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Kim HS, Ng DK, Matheson MB, Atkinson MA, Akhtar Y, Warady BA, Furth SL, Ruebner RL. Pubertal luteinizing hormone levels in children with chronic kidney disease and association with change in glomerular filtration rate. Pediatr Nephrol 2024; 39:1543-1549. [PMID: 37996757 DOI: 10.1007/s00467-023-06210-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 10/18/2023] [Accepted: 10/19/2023] [Indexed: 11/25/2023]
Abstract
BACKGROUND Children with chronic kidney disease (CKD) are at risk for abnormalities in pubertal development. We aimed to describe the timing of pubertal onset by luteinizing hormone (LH) levels and the association between hormonal onset of puberty with changes in GFR. METHODS Data from the Chronic Kidney Disease in Children (CKiD) study were collected prospectively. GFR was estimated at annual visits and measured by iohexol clearance every other year. LH was measured from stored repository serum samples in a nested sample of 124 participants. Hormonal onset of puberty was defined as LH level greater than or equal to 0.3 IU/L. A mixed effects model with random intercepts and slopes was used to compare the slope of decline of GFR before and after hormonal onset of puberty. The model was adjusted for age, glomerular disease diagnosis, baseline proteinuria on the log scale, and BMI. RESULTS Median age at hormonal onset of puberty was 9.9 years (IQR 8.1, 11.9) in girls and 10.2 years (IQR 9.2, 11.0) in boys. The mixed effects model showed faster decline in both estimated GFR and measured GFR in boys after hormonal onset of puberty (p < 0.001), and a similar but attenuated accelerated estimated GFR decline was observed for girls with no difference for measured GFR. CONCLUSIONS LH levels in the post-pubertal range were observed prior to clinical manifestations of puberty in children with CKD. Hormonal onset of puberty was associated with faster decline in GFR, particularly among boys with CKD.
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Affiliation(s)
- Hannah S Kim
- Division of Pediatric Nephrology, Weill Cornell Medicine, 505 East 70th St, 3rd floor, New York, NY, 10021, USA.
| | - Derek K Ng
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Matthew B Matheson
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Meredith A Atkinson
- Division of Pediatric Nephrology, Johns Hopkins University, Baltimore, MD, USA
| | - Yasmin Akhtar
- Division of Pediatric Endocrinology, Johns Hopkins University, Baltimore, MD, USA
| | - Bradley A Warady
- Division of Pediatric Nephrology, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Susan L Furth
- Pediatric Nephrology, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Rebecca L Ruebner
- Division of Pediatric Nephrology, Johns Hopkins University, Baltimore, MD, USA
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Duan J, Wen P, Zhao Y, van de Leemput J, Lai Yee J, Fermin D, Warady BA, Furth SL, Ng DK, Sampson MG, Han Z. A Drosophila model to screen Alport syndrome COL4A5 variants for their functional pathogenicity. bioRxiv 2024:2024.03.06.583697. [PMID: 38559272 PMCID: PMC10979928 DOI: 10.1101/2024.03.06.583697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Alport syndrome is a hereditary chronic kidney disease, attributed to rare pathogenic variants in either of three collagen genes (COL4A3/4/5) with most localized in COL4A5. Trimeric type IV Collagen α3α4α5 is essential for the glomerular basement membrane that forms the kidney filtration barrier. A means to functionally assess the many candidate variants and determine pathogenicity is urgently needed. We used Drosophila, an established model for kidney disease, and identify Col4a1 as the functional homolog of human COL4A5 in the fly nephrocyte (equivalent of human podocyte). Fly nephrocytes deficient for Col4a1 showed an irregular and thickened basement membrane and significantly reduced nephrocyte filtration function. This phenotype was restored by expressing human reference (wildtype) COL4A5, but not by COL4A5 carrying any of three established pathogenic patient-derived variants. We then screened seven additional patient COL4A5 variants; their ClinVar classification was either likely pathogenic or of uncertain significance. The findings support pathogenicity for four of these variants; the three others were found benign. Thus, demonstrating the effectiveness of this Drosophila in vivo kidney platform in providing the urgently needed variant-level functional validation.
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Affiliation(s)
- Jianli Duan
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
| | - Pei Wen
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
| | - Yunpo Zhao
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
| | - Joyce van de Leemput
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
| | - Jennifer Lai Yee
- Division of Nephrology, Department of Pediatric, University of Michigan School of Medicine, Ann Arbor, MI 48105, USA
| | - Damian Fermin
- Division of Nephrology, Department of Internal Medicine, University of Michigan School of Medicine, Ann Arbor, MI 48105, USA
| | - Bradley A Warady
- Division of Pediatric Nephrology, Children’s Mercy Kansas City, Kansas City, MO 64108, USA
| | - Susan L Furth
- Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA
- Division of Nephrology, Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Derek K Ng
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, MD 21205, USA
| | - Matthew G Sampson
- Division of Nephrology, Department of Pediatrics, Boston Children’s Hospital, Boston, MA 02115, USA
- Harvard Medical School Boston, MA 02115, USA
- Kidney Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Zhe Han
- Center for Precision Disease Modeling, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, MD 21201, USA
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Ren X, Chen J, Abraham AG, Xu Y, Siewe A, Warady BA, Kimmel PL, Vasan RS, Rhee EP, Furth SL, Coresh J, Denburg M, Rebholz CM. Plasma Metabolomics of Dietary Intake of Protein-Rich Foods and Kidney Disease Progression in Children. J Ren Nutr 2024; 34:95-104. [PMID: 37944769 PMCID: PMC10960708 DOI: 10.1053/j.jrn.2023.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 09/12/2023] [Accepted: 10/21/2023] [Indexed: 11/12/2023] Open
Abstract
OBJECTIVE Evidence regarding the efficacy of a low-protein diet for patients with CKD is inconsistent and recommending a low-protein diet for pediatric patients is controversial. There is also a lack of objective biomarkers of dietary intake. The purpose of this study was to identify plasma metabolites associated with dietary intake of protein and to assess whether protein-related metabolites are associated with CKD progression. METHODS Nontargeted metabolomics was conducted in plasma samples from 484 Chronic Kidney Disease in Children (CKiD) participants. Multivariable linear regression estimated the cross-sectional association between 949 known, nondrug metabolites and dietary intake of total protein, animal protein, plant protein, chicken, dairy, nuts and beans, red and processed meat, fish, and eggs, adjusting for demographic, clinical, and dietary covariates. Cox proportional hazards models assessed the prospective association between protein-related metabolites and CKD progression defined as the initiation of kidney replacement therapy or 50% eGFR reduction, adjusting for demographic and clinical covariates. RESULTS One hundred and twenty-seven (26%) children experienced CKD progression during 5 years of follow-up. Sixty metabolites were significantly associated with dietary protein intake. Among the 60 metabolites, 10 metabolites were significantly associated with CKD progression (animal protein: n = 1, dairy: n = 7, red and processed meat: n = 2, nuts and beans: n = 1), including one amino acid, one cofactor and vitamin, 4 lipids, 2 nucleotides, one peptide, and one xenobiotic. 1-(1-enyl-palmitoyl)-2-oleoyl-glycerophosphoethanolamine (GPE, P-16:0/18:1) was positively associated with dietary intake of red and processed meat, and a doubling of its abundance was associated with 88% higher risk of CKD progression. 3-ureidopropionate was inversely associated with dietary intake of red and processed meat, and a doubling of its abundance was associated with 48% lower risk of CKD progression. CONCLUSIONS Untargeted plasma metabolomic profiling revealed metabolites associated with dietary intake of protein and CKD progression in a pediatric population.
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Affiliation(s)
- Xuyuehe Ren
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Jingsha Chen
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Alison G Abraham
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland; Department of Epidemiology, University of Colorado School of Public Health, Aurora, Colorado
| | - Yunwen Xu
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Aisha Siewe
- Division of Cardiology, Department of Medicine, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Bradley A Warady
- Department of Pediatrics, University of Missouri-Kansas City School of Medicine, Children's Mercy Kansas City, Kansas City, Missouri
| | - Paul L Kimmel
- Division of Kidney, Urologic, and Hematologic Diseases, National Institute of Diabetes, Digestive, and Kidney Disorders, National Institutes of Health, Bethesda, Maryland; Division of Renal Diseases and Hypertension, Department of Medicine, George Washington University Medical Center, Washington, District of Columbia
| | | | - Eugene P Rhee
- Nephrology Division and Endocrinology Unit, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts
| | - Susan L Furth
- Division of Nephrology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Josef Coresh
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Michelle Denburg
- Division of Nephrology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Center for Pediatric Clinical Effectiveness, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Casey M Rebholz
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
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Fino NF, Adingwupu OM, Coresh J, Greene T, Haaland B, Shlipak MG, Costa E Silva VT, Kalil R, Mindikoglu AL, Furth SL, Seegmiller JC, Levey AS, Inker LA. Evaluation of novel candidate filtration markers from a global metabolomic discovery for glomerular filtration rate estimation. Kidney Int 2024; 105:582-592. [PMID: 38006943 PMCID: PMC10932836 DOI: 10.1016/j.kint.2023.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 10/31/2023] [Accepted: 11/10/2023] [Indexed: 11/27/2023]
Abstract
Creatinine and cystatin-C are recommended for estimating glomerular filtration rate (eGFR) but accuracy is suboptimal. Here, using untargeted metabolomics data, we sought to identify candidate filtration markers for a new targeted assay using a novel approach based on their maximal joint association with measured GFR (mGFR) and with flexibility to consider their biological properties. We analyzed metabolites measured in seven diverse studies encompasing 2,851 participants on the Metabolon H4 platform that had Pearson correlations with log mGFR and used a stepwise approach to develop models to < -0.5 estimate mGFR with and without inclusion of creatinine that enabled selection of candidate markers. In total, 456 identified metabolites were present in all studies, and 36 had correlations with mGFR < -0.5. A total of 2,225 models were developed that included these metabolites; all with lower root mean square errors and smaller coefficients for demographic variables compared to estimates using untargeted creatinine. Seventeen metabolites were chosen, including 12 new candidate filtration markers. The selected metabolites had strong associations with mGFR and little dependence on demographic factors. Candidate metabolites were identified with maximal joint association with mGFR and minimal dependence on demographic variables across many varied clinical settings. These metabolites are excreted in urine and represent diverse metabolic pathways and tubular handling. Thus, our data can be used to select metabolites for a multi-analyte eGFR determination assay using mass spectrometry that potentially offers better accuracy and is less prone to non-GFR determinants than the current eGFR biomarkers.
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Affiliation(s)
- Nora F Fino
- Division of Biostatistics, Department of Population Health Sciences, University of Utah Health, Salt Lake City, Utah, USA
| | - Ogechi M Adingwupu
- Division of Nephrology, Tufts Medical Center, Boston, Massachusetts, USA
| | - Josef Coresh
- Department of Population Health, NYU Langone, New York, New York, USA
| | - Tom Greene
- Division of Biostatistics, Department of Population Health Sciences, University of Utah Health, Salt Lake City, Utah, USA
| | - Ben Haaland
- Division of Biostatistics, Department of Population Health Sciences, University of Utah Health, Salt Lake City, Utah, USA
| | - Michael G Shlipak
- Kidney Health Research Collaborative, San Francisco Veterans Affair Medical Center and University of California, San Francisco, San Francisco, California, USA
| | - Veronica T Costa E Silva
- Serviço de Nefrologia, Instituto do Câncer do Estado de São Paulo, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil; Laboratório de Investigação Médica 16, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Roberto Kalil
- Division of Nephrology, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Ayse L Mindikoglu
- Margaret M. and Albert B. Alkek Department of Medicine, Section of Gastroenterology and Hepatology, Baylor College of Medicine, Houston, Texas, USA; Michael E. DeBakey Department of Surgery, Division of Abdominal Transplantation, Baylor College of Medicine, Houston, Texas, USA
| | - Susan L Furth
- Department of Pediatrics, Children's Hospital of Philadelphia, and the Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jesse C Seegmiller
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota, USA
| | - Andrew S Levey
- Division of Nephrology, Tufts Medical Center, Boston, Massachusetts, USA
| | - Lesley A Inker
- Division of Nephrology, Tufts Medical Center, Boston, Massachusetts, USA.
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Thomas E, Klomhaus AM, Laster ML, Furth SL, Warady BA, Salusky IB, Hanudel MR. Associations between anemia and FGF23 in the CKiD study. Pediatr Nephrol 2024; 39:837-847. [PMID: 37752381 PMCID: PMC10817837 DOI: 10.1007/s00467-023-06160-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 08/13/2023] [Accepted: 09/02/2023] [Indexed: 09/28/2023]
Abstract
BACKGROUND Fibroblast growth factor 23 (FGF23) is a bone-derived hormone that plays a central role in chronic kidney disease-mineral bone disorder and is associated with CKD progression and cardiovascular morbidity. Factors related to CKD-associated anemia, including iron deficiency, can increase FGF23 production. This study aimed to assess whether anemia and/or iron deficiency are associated with increased circulating concentrations of FGF23 in the large, well-characterized Chronic Kidney Disease in Children (CKiD) study cohort. METHODS Hemoglobin concentrations, iron parameters, C-terminal (total) FGF23, intact FGF23, and relevant covariables were measured in cross-sectional analysis of CKiD study subjects. RESULTS In 493 pediatric patients with CKD (median [interquartile range] age 13 [9, 16] years), the median estimated glomerular filtration rate was 48 [35, 61] ml/min/1.73 m2, and 103 patients (21%) were anemic. Anemic subjects had higher total FGF23 concentrations than non-anemic subjects (204 [124, 390] vs. 109 [77, 168] RU/ml, p < 0.001). In multivariable linear regression modeling, anemia was independently associated with higher total FGF23, after adjustment for demographic, kidney-related, mineral metabolism, and inflammatory covariables (standardized β (95% confidence interval) 0.10 (0.04, 0.17), p = 0.002). In the subset of subjects with available iron parameters (n = 191), iron deficiency was not associated with significantly higher total FGF23 concentrations. In the subgroup that had measurements of both total and intact FGF23 (n = 185), in fully adjusted models, anemia was significantly associated with higher total FGF23 (standardized β (95% CI) 0.16 (0.04, 0.27), p = 0.008) but not intact FGF23 (standardized β (95% CI) 0.02 (-0.12, 0.15), p = 0.81). CONCLUSIONS In this cohort of pediatric patients with CKD, anemia was associated with increased total FGF23 levels but was not independently associated with elevated intact FGF23, suggesting possible effects on both FGF23 production and cleavage. Further studies are warranted to investigate non-mineral factors affecting FGF23 production and metabolism in CKD.
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Affiliation(s)
- Elizabeth Thomas
- Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Alexandra M Klomhaus
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Marciana L Laster
- Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Susan L Furth
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Bradley A Warady
- Department of Pediatrics, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Isidro B Salusky
- Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Mark R Hanudel
- Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
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Inker LA, Tighiouart H, Adingwupu OM, Ng DK, Estrella MM, Maahs D, Yang W, Froissart M, Mauer M, Kalil R, Torres V, de Borst M, Klintmalm G, Poggio ED, Seegmiller JC, Rossing P, Furth SL, Warady BA, Schwartz GJ, Velez R, Coresh J, Levey AS. Performance of GFR Estimating Equations in Young Adults. Am J Kidney Dis 2024; 83:272-276. [PMID: 37717845 DOI: 10.1053/j.ajkd.2023.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/08/2023] [Accepted: 06/21/2023] [Indexed: 09/19/2023]
Affiliation(s)
- Lesley A Inker
- Department of Medicine, Division of Nephrology, Tufts Medical Center, Boston, Massachusetts.
| | - Hocine Tighiouart
- Institute for Clinical Research and Health Policy Studies, Tufts Medical Center, Boston, Massachusetts; Tufts Clinical and Translational Science Institute, Tufts University, Boston, Massachusetts
| | - Ogechi M Adingwupu
- Department of Medicine, Division of Nephrology, Tufts Medical Center, Boston, Massachusetts
| | - Derek K Ng
- Department of Epidemiology, John Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Michelle M Estrella
- Department of Medicine, Division of Nephrology, San Francisco VA Health Care System and University of California, San Francisco, California
| | - David Maahs
- Division of Endocrinology, Department of Pediatrics, and Stanford Diabetes Research Center, Stanford School of Medicine, Palo Alto, California
| | - Wei Yang
- Departments of Biostatistics, Epidemiology and Informatics, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Marc Froissart
- Clinical Trial Unit, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Michael Mauer
- Divisions of Pediatric and Adult Nephrology, University of Minnesota, Minneapolis, Minnesota
| | - Roberto Kalil
- Department of Medicine, Division of Nephrology, University of Maryland School of Medicine, Baltimore, Maryland
| | - Vicente Torres
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota
| | - Martin de Borst
- Faculty of Medical Sciences, University Medical Center Groningen, Groningen, the Netherlands
| | | | - Emilio D Poggio
- Department of Nephrology and Hypertension, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
| | - Jesse C Seegmiller
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota
| | - Peter Rossing
- Steno Diabetes Center Copenhagen and the Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Susan L Furth
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, and Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Bradley A Warady
- Division of Pediatric Nephrology, Children's Mercy Kansas City, Kansas City, Missouri
| | - George J Schwartz
- Department of Pediatrics, Pediatric Nephrology, University of Rochester Medical Center, Rochester, New York
| | | | - Josef Coresh
- Department of Epidemiology, John Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Andrew S Levey
- Department of Medicine, Division of Nephrology, Tufts Medical Center, Boston, Massachusetts
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Byfield RL, Xiao R, Shimbo D, Kronish IM, Furth SL, Amaral S, Cohen JB. Antihypertensive medication nonadherence and target organ damage in children with chronic kidney disease. Pediatr Nephrol 2024; 39:221-231. [PMID: 37442816 PMCID: PMC10790151 DOI: 10.1007/s00467-023-06059-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/30/2023] [Accepted: 05/31/2023] [Indexed: 07/15/2023]
Abstract
BACKGROUND Nonadherence is common in children with chronic kidney disease (CKD). This may contribute to inadequate blood pressure control and adverse outcomes. This study examined associations between antihypertensive medication nonadherence, ambulatory blood pressure monitoring (ABPM) parameters, kidney function, and cardiac structure among children with CKD. METHODS We performed secondary analyses of data from the CKD in Children (CKiD) study, including participants with treated hypertension who underwent ABPM, laboratory testing, and echocardiography biannually. Nonadherence was defined by self-report of any missed antihypertensive medication 7 days prior to the study visit. Linear regression and mixed-effects models were used to assess the association of nonadherence with baseline and time-updated ABPM profiles, estimated glomerular filtration rate (eGFR), urine protein to creatinine ratio (UPCR), and left ventricular mass index (LVMI). RESULTS Five-hundred and eight participants met inclusion criteria, followed for a median of 2.9 years; 212 (42%) were female, with median age 13 years (IQR 10-16), median baseline eGFR 49 (33-64) ml/min/1.73 m2 and median UPCR 0.4 (0.1-1.0) g/g. Nonadherence occurred in 71 (14%) participants. Baseline nonadherence was not significantly associated with baseline 24-h ABPM parameters (for example, mean 24-h SBP [β - 0.1, 95% CI - 2.7, 2.5]), eGFR (β 1.0, 95% CI - 0.9, 1.2), UCPR (β 1.1, 95% CI - 0.8, 1.5), or LVMI (β 0.6, 95% CI - 1.6, 2.9). Similarly, there were no associations between baseline nonadherence and time-updated outcome measures. CONCLUSIONS Self-reported antihypertensive medication nonadherence occurred in 1 in 7 children with CKD. We found no associations between nonadherence and kidney function or cardiac structure over time. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Rushelle L Byfield
- Division of Pediatric Nephrology and Hypertension, Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons, 622 West 168th Street, PH17-102E, NY, 10032, New York, USA.
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, PA, USA.
| | - Rui Xiao
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Daichi Shimbo
- Columbia Hypertension Center, Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | - Ian M Kronish
- Center for Behavioral Cardiovascular Health, Columbia University Irving Medical Center, New York, NY, USA
| | - Susan L Furth
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Sandra Amaral
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jordana B Cohen
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Renal-Electrolyte and Hypertension Division, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
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8
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Bae S, Schwartz GJ, Mendley SR, Warady BA, Furth SL, Muñoz A. Trajectories of eGFR after kidney transplantation according to trajectories of eGFR prior to kidney replacement therapies in children with chronic kidney disease. Pediatr Nephrol 2023; 38:4157-4164. [PMID: 37353626 PMCID: PMC10591981 DOI: 10.1007/s00467-023-06056-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 06/02/2023] [Accepted: 06/08/2023] [Indexed: 06/25/2023]
Abstract
BACKGROUND In children with chronic kidney disease (CKD), certain risk factors are associated with faster eGFR decline and earlier kidney failure. Whether these factors have lingering effects on post-transplant eGFR trajectory remains unclear. We characterized pre- and post-transplant eGFR trajectories in pediatric kidney transplant recipients by their pre-kidney replacement therapy (KRT) risk factors. METHODS We studied eGFR trajectories before KRT initiation and after transplantation among Chronic Kidney Disease in Children (CKiD) Study participants. We used mixed-effects models to compare pre-KRT versus post-transplant eGFR trajectories within individual participants by 7 pre-KRT risk factors: glomerular/non-glomerular etiology, race, preemptive transplant, proteinuria, albuminuria, and systolic/diastolic blood pressure (SBP/DBP). RESULTS We analyzed 1602 pre-KRT and 592 post-transplant eGFR measurements from 246 transplant recipients. Mean annual eGFR decline was decreased from 18.0% pre-KRT (95%CI, 16.1-19.8) to 5.0% post-transplant (95%CI, 3.3-6.7). All 7 pre-KRT risk factors showed strong associations with faster pre-KRT eGFR decline, but not with post-transplant eGFR decline; only albuminuria, high SBP, and high DBP reached statistical significance with notably attenuated associations. In our multivariable model of the pre-KRT risk factors, post-transplant eGFR decline was more rapid only when albuminuria and high SBP were both present. CONCLUSIONS eGFR decline substantially slows down after transplant even among children with rapidly progressing forms of CKD. Nonetheless, those who had albuminuria and high SBP before KRT might continue to show faster eGFR decline after transplant, specifically when both risk factors were present. This subgroup might benefit from intensive pre-transplant management for at least one of the two risk factors. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Sunjae Bae
- Department of Surgery, NYU Grossman School of Medicine, 1 Park Avenue, 6th Fl, New York, NY, 10016, USA.
| | - George J Schwartz
- Department of Pediatrics, Pediatric Nephrology, University of Rochester Medical Center, Rochester, NY, USA
| | - Susan R Mendley
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Bradley A Warady
- Division of Pediatric Nephrology, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Susan L Furth
- Children's Hospital of Philadelphia, Department of Pediatrics, Division of Nephrology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Alvaro Muñoz
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
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9
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Furth SL. Trials and Tribulations - The Challenges of Clinical Trials in Children. NEJM Evid 2023; 2:EVIDe2300280. [PMID: 38320507 DOI: 10.1056/evide2300280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
In this issue of NEJM Evidence, we see the results of a randomized clinical trial of dapagliflozin or saxagliptin in pediatric type 2 diabetes (T2D). In children and adolescents with T2D, dapagliflozin achieved significant improvements in glycemia in the trial.1 In June 2023, following another pivotal trial, the U.S. Food and Drug Administration (FDA) approved empagliflozin and the combination of empagliflozin and metformin as additions to diet and exercise to improve blood sugar control in children 10 years and older with T2D. Metformin, the only other oral therapy available for the treatment of children with T2D, was first approved for pediatric use in 2000.
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Affiliation(s)
- Susan L Furth
- Research Institute, Children's Hospital of Philadelphia, Philadelphia
- Division of Nephrology, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia
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10
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Schwaderer AL, Maier P, Greenbaum LA, Furth SL, Schwartz GJ. Application of GFR estimating equations to children with normal, near-normal, or discordant GFR. Pediatr Nephrol 2023; 38:4051-4059. [PMID: 37418011 DOI: 10.1007/s00467-023-06045-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 05/22/2023] [Accepted: 05/22/2023] [Indexed: 07/08/2023]
Abstract
BACKGROUND The objective was to determine the extent that eGFR formulas correspond to measured plasma iohexol clearance (iGFR) in children with normal or near normal kidney function, particularly how different eGFR formulas yield discordant results. METHODS iGFR from 2 (iGFR-2pt) and 4 (iGFR-4pt) time points along with creatinine and/or cystatin C-based eGFR were measured in children with mild CKD, stages 1-2. eGFR was calculated using 6 equations: 3 under 25 (U25) formulas from the Chronic Kidney Disease in Children (CKiD) study, the full age-combined cystatin C (cysC) and creatinine spectrum (FAS-combined), the European Kidney Function Consortium (EKFC-creatinine) equation, and the Chronic Kidney Disease Epidemiology Collaboration (CKD-epi) cysC-based equation. RESULTS Twenty-nine children were included, of which 22 had discordant creatinine vs. cystatin C-based eGFR by ≥ 15mL/min/1.73 m2. Overall, the FAS-combined had the least bias, while the U25 most accurately identified children with an eGFR < 90 mL/min/1.73 m2. When Cr-eGFR was ≥ 15 mL/min higher than CysC-eGFR, the U25 creatinine eGFR was closest to iGFR-4pt. When CysC eGFR was higher, the U25-combined was closest to iGFR-4pt. CONCLUSION The formulas that most closely approximated the measured GFR varied depending on the pattern of discordant eGFR results. Based on the results, we recommend using the CKiD U25-combined formula to screen for children with a low GFR. Either the CKiD U25-combined or FAS-combined would be recommended for changes in eGFR longitudinally. However, because all formulas were discordant from the iGFR-4pt in over a third of participants, further refinement of pediatric eGFR formulas is needed at the normal/near-normal range. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Andrew L Schwaderer
- Department of Pediatrics, Division of Nephrology, Indiana University, Indianapolis, USA
| | - Paula Maier
- Department of Pediatrics, Division of Nephrology, University of Rochester Medical Center, Room 4-8105, 601 Elmwood Avenue, Box 777, Rochester, NY, 14642, USA
| | - Larry A Greenbaum
- Department of Pediatrics, Division of Nephrology, Emory University and Children's Healthcare of Atlanta, Atlanta, USA
| | - Susan L Furth
- Departments of Pediatrics and Epidemiology, Perelman School of Medicine at the University of Pennsylvania, and the Children's Hospital of Philadelphia, Philadelphia, USA
| | - George J Schwartz
- Department of Pediatrics, Division of Nephrology, University of Rochester Medical Center, Room 4-8105, 601 Elmwood Avenue, Box 777, Rochester, NY, 14642, USA.
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11
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Brown DD, Roem J, Ng DK, Coghlan RF, Johnstone B, Horton W, Furth SL, Warady BA, Melamed ML, Dauber A. Associations between collagen X biomarker and linear growth velocity in a pediatric chronic kidney disease cohort. Pediatr Nephrol 2023; 38:4145-4156. [PMID: 37466864 PMCID: PMC10642619 DOI: 10.1007/s00467-023-06047-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 05/16/2023] [Accepted: 06/07/2023] [Indexed: 07/20/2023]
Abstract
BACKGROUND Collagen X biomarker (CXM) is a novel biomarker of linear growth velocity. We investigated whether CXM correlated with measured growth velocity in children with impaired kidney function. METHODS We used data from children aged 2 through 16 years old enrolled in the Chronic Kidney Disease in Children (CKiD) study. We assessed the association between CXM level and growth velocity based on height measurements obtained at study visits using linear regression models constructed separately by sex, with and without adjustment for CKD covariates. Linear mixed-effects models were used to capture the between-individual and within-individual CXM changes over time associated with concomitant changes in growth velocity from baseline through follow-up. RESULTS A total of 967 serum samples from 209 participants were assayed for CXM. CXM correlated more strongly in females compared to male participants. After adjustment for growth velocity and CKD covariates, only proteinuria in male participants affected CXM levels. Finally, we quantified the between- and within-participant associations between CXM level and growth velocity. A between-participant increase of 24% and 15% in CXM level in females and males, respectively, correlated with a 1 cm/year higher growth velocity. Within an individual participant, on average, 28% and 13% increases in CXM values in females and males, respectively, correlated with a 1 cm/year change in measured growth. CONCLUSIONS CXM measurement is potentially a valuable aid for monitoring growth in pediatric CKD. However, future research, including studies of CXM metabolism, is needed to clarify whether CXM can be a surrogate of growth in children with CKD. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Denver D Brown
- Division of Nephrology, Children's National Hospital/Department of Pediatrics, George Washington School of Medicine, 111 Michigan Ave, Washington, NWDC, USA.
| | - Jennifer Roem
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Derek K Ng
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Ryan F Coghlan
- Research Center, Shriners Hospital for Children, Portland, OR, USA
| | - Brian Johnstone
- Research Center, Shriners Hospital for Children, Portland, OR, USA
- Department of Orthopaedics & Rehabilitation, Oregon Health & Science University, Portland, OR, USA
- Department of Molecular & Medical Genetics, Oregon Health & Science University, Portland, OR, USA
| | - William Horton
- Research Center, Shriners Hospital for Children, Portland, OR, USA
- Department of Molecular & Medical Genetics, Oregon Health & Science University, Portland, OR, USA
| | - Susan L Furth
- Division of Pediatric Nephrology, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Bradley A Warady
- Division of Pediatric Nephrology, Children's Mercy Hospital, Kansas City, MO, USA
| | - Michal L Melamed
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Andrew Dauber
- Division of Endocrinology, Children's National Hospital/Department of Pediatrics, George Washington School of Medicine, Washington, DC, USA
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12
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Kula AJ, Flynn JT, Prince DK, Furth SL, Warady B, Isakova T, Christenson R, Bansal N. Descriptions and Determinants of N-Terminal Pro-B-Type Natriuretic Peptide in Pediatric CKD: The Chronic Kidney Disease in Children (CKiD) Study. Am J Kidney Dis 2023; 82:776-778. [PMID: 37393051 PMCID: PMC10989192 DOI: 10.1053/j.ajkd.2023.03.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 03/28/2023] [Indexed: 07/03/2023]
Affiliation(s)
- Alexander J Kula
- Division of Pediatric Nephrology, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois.
| | - Joseph T Flynn
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington; Division of Nephrology, Seattle Children's Hospital, Seattle, Washington
| | - David K Prince
- Kidney Research Institute, Division of Nephrology, University of Washington, Seattle, Washington
| | - Susan L Furth
- Division of Pediatric Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Bradley Warady
- Division of Pediatric Nephrology, Children's Mercy Kansas City, Kansas City, Missouri
| | - Tamara Isakova
- Division of Nephrology, Department of Medicine, Northwestern University, Chicago, Illinois
| | - Robert Christenson
- Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
| | - Nisha Bansal
- Kidney Research Institute, Division of Nephrology, University of Washington, Seattle, Washington
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13
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Stone HK, Mitsnefes M, Dickinson K, Burrows EK, Razzaghi H, Luna IY, Gluck CA, Dixon BP, Dharnidharka VR, Smoyer WE, Somers MJ, Flynn JT, Furth SL, Bailey C, Forrest CB, Denburg M, Nehus E. Clinical course and management of children with IgA vasculitis with nephritis. Pediatr Nephrol 2023; 38:3721-3733. [PMID: 37316676 PMCID: PMC10514113 DOI: 10.1007/s00467-023-06023-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 04/25/2023] [Accepted: 05/04/2023] [Indexed: 06/16/2023]
Abstract
BACKGROUND IgA vasculitis is the most common vasculitis in children and is often complicated by acute nephritis (IgAVN). Risk of chronic kidney disease (CKD) among children with IgAVN remains unknown. This study aimed to describe the clinical management and kidney outcomes in a large cohort of children with IgAVN. METHODS This observational cohort study used the PEDSnet database to identify children diagnosed with IgAV between January 1, 2009, and February 29, 2020. Demographic and clinical characteristics were compared among children with and without kidney involvement. For children followed by nephrology, clinical course, and management patterns were described. Patients were divided into four categories based on treatment: observation, renin-angiotensin-aldosterone system (RAAS) blockade, corticosteroids, and other immunosuppression, and outcomes were compared among these groups. RESULTS A total of 6802 children had a diagnosis of IgAV, of whom 1139 (16.7%) were followed by nephrology for at least 2 visits over a median follow-up period of 1.7 years [0.4,4.2]. Conservative management was the most predominant practice pattern, consisting of observation in 57% and RAAS blockade in 6%. Steroid monotherapy was used in 29% and other immunosuppression regimens in 8%. Children receiving immunosuppression had higher rates of proteinuria and hypertension compared to those managed with observation (p < 0.001). At the end of follow-up, 2.6 and 0.5% developed CKD and kidney failure, respectively. CONCLUSIONS Kidney outcomes over a limited follow-up period were favorable in a large cohort of children with IgAV. Immunosuppressive medications were used in those with more severe presentations and may have contributed to improved outcomes. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Hillarey K Stone
- Division of Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, MLC 7022, Cincinnati, OH, 45229, USA.
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
| | - Mark Mitsnefes
- Division of Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, MLC 7022, Cincinnati, OH, 45229, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Kimberley Dickinson
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Evanette K Burrows
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Hanieh Razzaghi
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Ingrid Y Luna
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Caroline A Gluck
- Division of Pediatric Nephrology, Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Bradley P Dixon
- Renal Section, Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Vikas R Dharnidharka
- Division of Pediatric Nephrology, Washington University School of Medicine, Saint Louis, MO, USA
| | - William E Smoyer
- Center for Clinical and Translational Research, Abigail Wexner Research Institute, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Michael J Somers
- Division of Nephrology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Joseph T Flynn
- Division of Nephrology, Department of Pediatrics, Seattle Children's Hospital and University of Washington School of Medicine, Seattle, WA, USA
| | - Susan L Furth
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Epidemiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Charles Bailey
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Christopher B Forrest
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Michelle Denburg
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Epidemiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Edward Nehus
- Department of Pediatrics, West Virginia University Charleston Campus, Charleston, WV, USA
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14
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Faulkner SC, Matheson MB, Greenberg JH, Garimella PS, Furth SL, Ix JH, Bakhoum CY. Association of clinical characteristics with urine uromodulin in children with chronic kidney disease. Pediatr Nephrol 2023; 38:3859-3862. [PMID: 36988691 PMCID: PMC10528151 DOI: 10.1007/s00467-023-05947-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/06/2023] [Accepted: 03/10/2023] [Indexed: 03/30/2023]
Abstract
BACKGROUND Uromodulin is the most abundant protein in the urine of healthy adults, and higher urine concentrations mark better tubular health. Greater kidney size and function are predictors of higher uromodulin levels in adults. Urine uromodulin has not yet been studied in children with chronic kidney disease (CKD). Thus, we sought to determine the relationship between age and kidney function with urine uromodulin levels in children with CKD. METHODS In the CKD in Children (CKiD) cohort, we utilized multivariable linear regression to evaluate the relationship of age and eGFR with urine uromodulin levels. The primary outcome was uromodulin indexed to urine creatinine (Umod/Cr, mg/g), which was log2-transformed given its skewed distribution. RESULTS Among 677 CKiD participants, the median age was 11.8 years (8.2-15.3), the median eGFR was 49 ml/min/1.73 m2 (37-63), the etiology of CKD was glomerular disease in 31%, and the median Umod/Cr level was 0.114 mg/g (0.045-0.226). In the multivariable models, each one-year older age was associated with 0.18 (12%) lower log2(Umod/Cr) and 0.20 (13%) lower log2(Umod/Cr) among those with non-glomerular and glomerular disease, respectively (p < 0.001). However, we did not find a statistically significant association between eGFR and Umod/Cr in either participants with non-glomerular or glomerular disease (p = 0.13 and p = 0.58, respectively). CONCLUSIONS Among children with CKD, older age is significantly associated with lower Umod/Cr, independent of eGFR. Further studies are needed to comprehensively evaluate age-specific reference ranges for urine uromodulin and to evaluate the longitudinal relationship of uromodulin with both age and eGFR in children with CKD. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Sophia C Faulkner
- Clinical and Translational Research Accelerator, Yale University, New Haven, CT, USA
| | - Matthew B Matheson
- Bloomberg School of Public Health, John Hopkins University, Baltimore, MD, USA
| | - Jason H Greenberg
- Clinical and Translational Research Accelerator, Yale University, New Haven, CT, USA
- Department of Pediatrics, Section of Pediatric Nephrology, Yale University, New Haven, CT, USA
| | - Pranav S Garimella
- Division of Nephrology and Hypertension, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Susan L Furth
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Joachim H Ix
- Division of Nephrology and Hypertension, Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Nephrology Section, Medicine Service, Veterans Affairs San Diego Healthcare System, La Jolla, CA, USA
| | - Christine Y Bakhoum
- Clinical and Translational Research Accelerator, Yale University, New Haven, CT, USA.
- Department of Pediatrics, Section of Pediatric Nephrology, Yale University, New Haven, CT, USA.
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15
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Ng DK, Matheson MB, Schwartz GJ, Wang FM, Mendley SR, Furth SL, Warady BA. Development of an adaptive clinical web-based prediction tool for kidney replacement therapy in children with chronic kidney disease. Kidney Int 2023; 104:985-994. [PMID: 37391041 PMCID: PMC10592093 DOI: 10.1016/j.kint.2023.06.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 05/31/2023] [Accepted: 06/08/2023] [Indexed: 07/02/2023]
Abstract
Clinicians need improved prediction models to estimate time to kidney replacement therapy (KRT) for children with chronic kidney disease (CKD). Here, we aimed to develop and validate a prediction tool based on common clinical variables for time to KRT in children using statistical learning methods and design a corresponding online calculator for clinical use. Among 890 children with CKD in the Chronic Kidney Disease in Children (CKiD) study, 172 variables related to sociodemographics, kidney/cardiovascular health, and therapy use, including longitudinal changes over one year were evaluated as candidate predictors in a random survival forest for time to KRT. An elementary model was specified with diagnosis, estimated glomerular filtration rate and proteinuria as predictors and then random survival forest identified nine additional candidate predictors for further evaluation. Best subset selection using these nine additional candidate predictors yielded an enriched model additionally based on blood pressure, change in estimated glomerular filtration rate over one year, anemia, albumin, chloride and bicarbonate. Four additional partially enriched models were constructed for clinical situations with incomplete data. Models performed well in cross-validation, and the elementary model was then externally validated using data from a European pediatric CKD cohort. A corresponding user-friendly online tool was developed for clinicians. Thus, our clinical prediction tool for time to KRT in children was developed in a large, representative pediatric CKD cohort with an exhaustive evaluation of potential predictors and supervised statistical learning methods. While our models performed well internally and externally, further external validation of enriched models is needed.
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Affiliation(s)
- Derek K Ng
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA.
| | - Matthew B Matheson
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - George J Schwartz
- Department of Pediatrics, University of Rochester Medical Center, Rochester, New York, USA
| | - Frances M Wang
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Susan R Mendley
- Division of Kidney, Urologic and Hematologic Diseases, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Susan L Furth
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA; Department of Pediatrics, Division of Nephrology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Bradley A Warady
- Division of Pediatric Nephrology, Children's Mercy Kansas City, Kansas City, Missouri, USA
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16
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Lee AM, Xu Y, Hooper SR, Abraham AG, Hu J, Xiao R, Matheson MB, Brunson C, Rhee EP, Coresh J, Vasan RS, Schrauben S, Kimmel PL, Warady BA, Furth SL, Hartung EA, Denburg MR. Circulating Metabolomic Associations with Neurocognitive Outcomes in Pediatric CKD. Clin J Am Soc Nephrol 2023; 19:01277230-990000000-00269. [PMID: 37871960 PMCID: PMC10843217 DOI: 10.2215/cjn.0000000000000318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 10/16/2023] [Indexed: 10/25/2023]
Abstract
BACKGROUND Children with CKD are at risk for impaired neurocognitive functioning. We investigated metabolomic associations with neurocognition in children with CKD. METHODS We leveraged data from the Chronic Kidney Disease in Children (CKiD) study and the Neurocognitive Assessment and Magnetic Resonance Imaging Analysis of Children and Young Adults with Chronic Kidney Disease (NiCK) study. CKiD is a multi-institutional cohort that enrolled children aged 6 months to 16 years with eGFR 30-90 ml/min per 1.73 m 2 ( n =569). NiCK is a single-center cross-sectional study of participants aged 8-25 years with eGFR<90 ml/min per 1.73 m 2 ( n =60) and matched healthy controls ( n =67). Untargeted metabolomic quantification was performed on plasma (CKiD, 622 metabolites) and serum (NiCK, 825 metabolites) samples. Four neurocognitive domains were assessed: intelligence, attention regulation, working memory, and parent ratings of executive function. Repeat assessments were performed in CKiD at 2-year intervals. Linear regression and linear mixed-effects regression analyses adjusting for age, sex, delivery history, hypertension, proteinuria, CKD duration, and glomerular versus nonglomerular diagnosis were used to identify metabolites associated with neurocognitive z-scores. Analyses were performed with and without adjustment for eGFR. RESULTS There were multiple metabolite associations with neurocognition observed in at least two of the analytic samples (CKiD baseline, CKiD follow-up, and NiCK CKD). Most of these metabolites were significantly elevated in children with CKD compared with healthy controls in NiCK. Notable signals included associations with parental ratings of executive function: phenylacetylglutamine, indoleacetylglutamine, and trimethylamine N-oxide-and with intelligence: γ -glutamyl amino acids and aconitate. CONCLUSIONS Several metabolites were associated with neurocognitive dysfunction in pediatric CKD, implicating gut microbiome-derived substances, mitochondrial dysfunction, and altered energy metabolism, circulating toxins, and redox homeostasis.
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Affiliation(s)
- Arthur M. Lee
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Yunwen Xu
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland
| | - Stephen R. Hooper
- Department of Health Sciences, School of Medicine, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina
| | - Alison G. Abraham
- Department of Epidemiology, Colorado University School of Public Health, Aurora, Colorado
| | - Jian Hu
- Department of Human Genetics, Emory University School of Medicine, Atlanta, Georgia
| | - Rui Xiao
- Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Matthew B. Matheson
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland
| | - Celina Brunson
- Division of Nephrology, Children's National Hospital, Washington, DC
| | - Eugene P. Rhee
- Division of Nephrology, Massachusetts General Hospital, Boston, Massachusetts
- Harvard School of Medicine, Boston, Massachusetts
| | - Josef Coresh
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland
- Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ramachandran S. Vasan
- Boston University School of Medicine, Boston, Massachusetts
- Boston University School of Public Health, Boston, Massachusetts
| | - Sarah Schrauben
- Perelman School of Medicine at the University of Pennsylvania, Department of Medicine and Department of Biostatistics, Epidemiology, and Informatics, Philadelphia, Pennsylvania
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Paul L. Kimmel
- Division of Kidney, Urologic, and Hematologic Diseases, National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland
| | - Bradley A. Warady
- Division of Nephrology, Children's Mercy Kansas City, Kansas City, Missouri
- University of Missouri-Kansas City School of Medicine, Kansas City, Missouri
| | - Susan L. Furth
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania
- Perelman School of Medicine at the University of Pennsylvania, Department of Pediatrics and Department of Biostatistics, Epidemiology, and Informatics, Philadelphia, Pennsylvania
| | - Erum A. Hartung
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Perelman School of Medicine at the University of Pennsylvania, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Michelle R. Denburg
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Perelman School of Medicine at the University of Pennsylvania, Department of Pediatrics and Department of Biostatistics, Epidemiology, and Informatics, Philadelphia, Pennsylvania
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17
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Harshman LA, Ward RC, Matheson MB, Dawson A, Kogon AJ, Lande MB, Molitor SJ, Johnson RJ, Wilson C, Warady BA, Furth SL, Hooper SR. The Impact of Pediatric CKD on Educational and Employment Outcomes. Kidney360 2023; 4:1389-1396. [PMID: 37418621 PMCID: PMC10615373 DOI: 10.34067/kid.0000000000000206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 06/29/2023] [Indexed: 07/09/2023]
Abstract
Key Points This study evaluates educational and employment outcomes in patients with pediatric kidney disease and assesses predictors of educational attainment and employment in young adulthood. Despite high rates of high school graduation, nearly 20% of patients with CKD are unemployed or receiving disability at long-term follow-up. Background Pediatric patients with CKD are at risk for neurocognitive deficits and academic underachievement. This population may be at risk for lower educational attainment and higher rates of unemployment; however, published data have focused on patients with advanced CKD and exist in isolation from assessment of neurocognition and kidney function. Methods Data from the CKD in Children (CKiD) cohort study were used to characterize educational attainment and employment status in young adults with CKD. We used ratings of executive function as a predictor of future educational attainment and employment status. Linear regression models predicted the highest grade level completed. Logistic regression models predicted unemployment. Results A total of 296 CKiD participants aged 18 years or older had available educational data. In total, 220 of 296 had employment data. By age 22 years, 97% had completed high school and 48% completed 2+ years of college. Among those reporting employment status, 58% were part-time or full-time employed, 22% were nonworking students, and 20% were unemployed and/or receiving disability. In adjusted models, lower kidney function (P = 0.02), worse executive function (P = 0.02), and poor performance on achievement testing (P = 0.004) predicted lower grade level completed relative to expectation for age. Conclusions CKiD study patients appear to have a better high school graduation rates (97%) than the adjusted national high school graduation rate (86%). Conversely, roughly 20% of participants were unemployed or receiving disability at study follow-up. Tailored interventions may benefit patients with CKD with lower kidney function and/or executive function deficits to optimize educational/employment outcomes in adulthood.
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Affiliation(s)
- Lyndsay A. Harshman
- Stead Family Department of Pediatrics, University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Ryan C. Ward
- Stead Family Department of Pediatrics, University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Matthew B. Matheson
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Anne Dawson
- Section of Pediatric Psychology and Neuropsychology, Nationwide Children's Hospital, Columbus, Ohio
| | - Amy J. Kogon
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | | | - Stephen J. Molitor
- Medical College of Wisconsin, Department of Pediatrics, Division of Pediatric Psychology, Milwaukee, Wisconsin
| | - Rebecca J. Johnson
- Division of Nephrology, Children's Mercy Kansas City, Kansas City, Missouri
| | - Camille Wilson
- Section of Pediatric Psychology and Neuropsychology, Nationwide Children's Hospital, Columbus, Ohio
| | - Bradley A. Warady
- Division of Nephrology, Children's Mercy Kansas City, Kansas City, Missouri
| | - Susan L. Furth
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Stephen R. Hooper
- Department of Health Sciences, School of Medicine, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina
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18
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Ku E, McCulloch CE, Bicki A, Lin F, Lopez I, Furth SL, Warady BA, Grimes BA, Amaral S. Association Between Dialysis Facility Ownership and Mortality Risk in Children With Kidney Failure. JAMA Pediatr 2023; 177:1065-1072. [PMID: 37669042 PMCID: PMC10481326 DOI: 10.1001/jamapediatrics.2023.3414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 07/13/2023] [Indexed: 09/06/2023]
Abstract
Importance In adults, treatment at profit dialysis facilities has been associated with a higher risk of death. Objective To determine whether profit status of dialysis facilities is associated with the risk of death in children with kidney failure treated with dialysis and whether any such association is mediated by differences in access to transplant. Design, Setting, and Participants This retrospective cohort study reviewed US Renal Data System records of 15 359 children who began receiving dialysis for kidney failure between January 1, 2000, and December 31, 2019, in US dialysis facilities. The data analysis was performed between May 2, 2022, and June 15, 2023. Exposure Time-updated profit status of dialysis facilities. Main Outcomes and Measures Adjusted Fine-Gray models were used to determine the association of time-updated profit status of dialysis facilities with risk of death, treating kidney transplant as a competing risk. Cox proportional hazards regression models were also used to determine time-updated profit status with risk of death regardless of transplant status. Results The final cohort included 8465 boys (55.3%) and 6832 girls (44.7%) (median [IQR] age, 12 [3-15] years). During a median follow-up of 1.4 (IQR, 0.6-2.7) years, with censoring at transplant, the incidence of death was higher at profit vs nonprofit facilities (7.03 vs 4.06 per 100 person-years, respectively). Children treated at profit facilities had a 2.07-fold (95% CI, 1.83-2.35) higher risk of death compared with children at nonprofit facilities in adjusted analyses accounting for the competing risk of transplant. When follow-up was extended regardless of transplant status, the risk of death remained higher for children treated in profit facilities (hazard ratio, 1.47; 95% CI, 1.35-1.61). Lower access to transplant in profit facilities mediated 67% of the association between facility profit status and risk of death (95% CI, 45%-100%). Conclusions and Relevance Given the higher risk of death associated with profit dialysis facilities that is partially mediated by lower access to transplant, the study's findings indicate a need to identify root causes and targeted interventions that can improve mortality outcomes for children treated in these facilities.
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Affiliation(s)
- Elaine Ku
- Division of Nephrology, Department of Medicine and Pediatrics, University of California, San Francisco, San Francisco
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco
| | - Charles E. McCulloch
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco
| | - Alexandra Bicki
- Division of Nephrology, Department of Medicine and Pediatrics, University of California, San Francisco, San Francisco
| | - Feng Lin
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco
| | - Isabelle Lopez
- Division of Nephrology, Department of Medicine and Pediatrics, University of California, San Francisco, San Francisco
| | - Susan L. Furth
- Division of Pediatric Nephrology, Department of Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia
| | - Bradley A. Warady
- Children’s Mercy Kansas City, Division of Nephrology, University of Missouri-Kansas City School of Medicine, Kansas City, Missouri
| | - Barbara A. Grimes
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco
| | - Sandra Amaral
- Division of Pediatric Nephrology, Department of Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia
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19
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Canney M, Induruwage D, Tang M, Alencar de Pinho N, Er L, Zhao Y, Djurdjev O, Ahn YH, Behnisch R, Calice-Silva V, Chesnaye NC, de Borst MH, Dember LM, Dionne J, Ebert N, Eder S, Fenton A, Fukagawa M, Furth SL, Hoy WE, Imaizumi T, Jager KJ, Jha V, Kang HG, Kitiyakara C, Mayer G, Oh KH, Onu U, Pecoits-Filho R, Reichel H, Richards A, Schaefer F, Schaeffner E, Scheppach JB, Sola L, Ulasi I, Wang J, Yadav AK, Zhang J, Feldman HI, Taal MW, Stengel B, Levin A. Regional Variation in Hemoglobin Distribution Among Individuals With CKD: the ISN International Network of CKD Cohorts. Kidney Int Rep 2023; 8:2056-2067. [PMID: 37850014 PMCID: PMC10577366 DOI: 10.1016/j.ekir.2023.07.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 07/31/2023] [Indexed: 10/19/2023] Open
Abstract
Introduction Despite recognized geographic and sex-based differences in hemoglobin in the general population, these factors are typically ignored in patients with chronic kidney disease (CKD) in whom a single therapeutic range for hemoglobin is recommended. We sought to compare the distribution of hemoglobin across international nondialysis CKD populations and evaluate predictors of hemoglobin. Methods In this cross-sectional study, hemoglobin distribution was evaluated in each cohort overall and stratified by sex and estimated glomerular filtration rate (eGFR). Relationships between candidate predictors and hemoglobin were assessed from linear regression models in each cohort. Estimates were subsequently pooled in a random effects model. Results A total of 58,613 participants from 21 adult cohorts (median eGFR range of 17-49 ml/min) and 3 pediatric cohorts (median eGFR range of 26-45 ml/min) were included with broad geographic representation. Hemoglobin values varied substantially among the cohorts, overall and within eGFR categories, with particularly low mean hemoglobin observed in women from Asian and African cohorts. Across the eGFR range, women had a lower hemoglobin compared to men, even at an eGFR of 15 ml/min (mean difference 5.3 g/l, 95% confidence interval [CI] 3.7-6.9). Lower eGFR, female sex, older age, lower body mass index, and diabetic kidney disease were all independent predictors of a lower hemoglobin value; however, this only explained a minority of variance (R2 7%-44% across cohorts). Conclusion There are substantial regional differences in hemoglobin distribution among individuals with CKD, and the majority of variance is unexplained by demographics, eGFR, or comorbidities. These findings call for a renewed interest in improving our understanding of hemoglobin determinants in specific CKD populations.
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Affiliation(s)
- Mark Canney
- Department of Medicine, University of Ottawa and the Ottawa Hospital Research Institute, Ontario, Canada
| | | | - Mila Tang
- Division of Nephrology, Department of Pediatrics, University of British Columbia, Canada
| | | | - Lee Er
- Methodology and Analytics, BC Renal, Vancouver, British Columbia, Canada
| | - Yinshan Zhao
- School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
| | - Ognjenka Djurdjev
- Methodology and Analytics, BC Renal, Vancouver, British Columbia, Canada
| | - Yo Han Ahn
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, South Korea
| | - Rouven Behnisch
- Institute of Medical Biometry, University Hospital Heidelberg, Germany
| | - Viviane Calice-Silva
- Research Department, Pro-rim Foundation, Joinville-SC, Brazil
- School of Medicine, UNIVILLE, Joinville-SC, Brazil
| | - Nicholas C. Chesnaye
- Amsterdam Public Health Research Institute, Quality of Care, Amsterdam, the Netherlands
- ERA Registry, Amsterdam UMC Location University of Amsterdam, Medical Informatics, Amsterdam, Netherlands
| | - Martin H. de Borst
- Department of Internal Medicine, Division of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Laura M. Dember
- Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
- Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Janis Dionne
- Division of Nephrology, Department of Pediatrics, University of British Columbia, Canada
| | - Natalie Ebert
- Institute of Public Health, Charité Universitätsmedizin Berlin, Germany
| | - Susanne Eder
- Department of Internal Medicine IV (Nephrology and Hypertension), Medical University of Innsbruck, Innsbruck, Austria
| | - Anthony Fenton
- Institute of Applied Health Sciences, University of Birmingham, Birmingham, UK
| | - Masafumi Fukagawa
- Division of Nephrology, Endocrinology, and Metabolism, Tokai University School of Medicine, Isehara, Japan
| | - Susan L. Furth
- Division of Nephrology, Children’s Hospital of Philadelphia, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Wendy E. Hoy
- University of Mississippi Medical Center, Jackson, Mississippi, USA
- Department of Anatomy and Cell Biology, Monash University, Clayton, Victoria, Australia
- Centre for Chronic Disease, University of Queensland, Brisbane, Queensland, Australia
| | - Takahiro Imaizumi
- Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. Department of Advanced Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Kitty J. Jager
- Amsterdam Public Health Research Institute, Quality of Care, Amsterdam, the Netherlands
- ERA Registry, Amsterdam UMC Location University of Amsterdam, Medical Informatics, Amsterdam, Netherlands
| | - Vivekanand Jha
- George Institute for Global Health, UNSW, New Delhi, India
- School of Public Health, Imperial College, London, UK
- Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, India
| | - Hee Gyung Kang
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, South Korea
| | - Chagriya Kitiyakara
- Departments of Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Gert Mayer
- Department of Internal Medicine IV (Nephrology and Hypertension), Medical University of Innsbruck, Innsbruck, Austria
| | - Kook-Hwan Oh
- Department of Internal Medicine, Seoul National University, Seoul, South Korea
| | - Ugochi Onu
- Department of Medicine, University of Nigeria Teaching Hospital, Enugu, Nigeria
| | - Roberto Pecoits-Filho
- DOPPS Program Area, Arbor Research Collaborative for Health, Ann Arbor, Michigan, USA
- School of Medicine, Pontifica Universidade Catolica do Parana, Curitiba, Brazil
| | | | - Anna Richards
- Value Evidence and Outcomes, GSK, Brentford, Middlesex, UK
| | - Franz Schaefer
- Pediatric Nephrology Division, University Children's Hospital, Heidelberg, Germany
| | - Elke Schaeffner
- Institute of Public Health, Charité Universitätsmedizin Berlin, Germany
| | | | - Laura Sola
- Hemodialysis Unit, CASMU-IAMPP, Montevideo, Uruguay
| | - Ifeoma Ulasi
- Department of Medicine, University of Nigeria Teaching Hospital, Enugu, Nigeria
- Renal Unit, Department of Medicine, College of Medicine, University of Nigeria, Ituku-Ozalla, Enugu, Nigeria
| | - Jinwei Wang
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing, China
- Peking University Institute of Nephrology, Peking University Health Science Center, Beijing, China
| | - Ashok K. Yadav
- Department of Experimental Medicine and Biotechnology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Jianzhen Zhang
- Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Harold I. Feldman
- Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
- Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
| | - Maarten W. Taal
- Centre for Kidney Research and Innovation, Academic Unit for Translational Medical Sciences, University of Nottingham School of Medicine, Nottingham, UK
| | - Bénédicte Stengel
- CESP, University Paris-Saclay, UVSQ, Inserm, Clinical Epidemiology Team, Villejuif, France
| | - Adeera Levin
- Division of Nephrology, Department of Pediatrics, University of British Columbia, Canada
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20
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Kurzinski KL, Xu Y, Ng DK, Furth SL, Schwartz GJ, Warady BA. Hyperkalemia in pediatric chronic kidney disease. Pediatr Nephrol 2023; 38:3083-3090. [PMID: 36939915 PMCID: PMC10550342 DOI: 10.1007/s00467-023-05912-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/18/2023] [Accepted: 02/07/2023] [Indexed: 03/21/2023]
Abstract
BACKGROUND While hyperkalemia is well described in adult chronic kidney disease (CKD), large studies evaluating potassium trends and risk factors for hyperkalemia in pediatric CKD are lacking. This study aimed to characterize hyperkalemia prevalence and risk factors in pediatric CKD. METHODS Cross-sectional analysis of Chronic Kidney Disease in Children (CKiD) study data evaluated median potassium levels and percentage of visits with hyperkalemia (K ≥5.5 mmoL/L) in relation to demographics, CKD stage, etiology, proteinuria, and acid-base status. Multiple logistic regression was used to identify risk factors for hyperkalemia. RESULTS One thousand and fifty CKiD participants with 5183 visits were included (mean age 13.1 years, 62.7% male, 32.9% self-identifying as African American or Hispanic). A percentage of 76.6% had non-glomerular disease, 18.7% had CKD stage 4/5, 25.8% had low CO2, and 54.2% were receiving ACEi/ARB therapy. Unadjusted analysis identified a median serum potassium level of 4.5 mmol/L (IQR 4.1-5.0, p <0.001) and hyperkalemia in 6.6% of participants with CKD stage 4/5. Hyperkalemia was present in 14.3% of visits with CKD stage 4/5 and glomerular disease. Hyperkalemia was associated with low CO2 (OR 7.72, 95%CI 3.05-19.54), CKD stage 4/5 (OR 9.17, 95%CI 4.02-20.89), and use of ACEi/ARB therapy (OR 2.14, 95%CI 1.36-3.37). Those with non-glomerular disease were less frequently hyperkalemic (OR 0.52, 95%CI 0.34-0.80). Age, sex, and race/ethnicity were not associated with hyperkalemia. CONCLUSIONS Hyperkalemia was observed more frequently in children with advanced stage CKD, glomerular disease, low CO2, and ACEi/ARB use. These data can help clinicians identify high-risk patients who may benefit from earlier initiation of potassium-lowering therapies. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Katherine L Kurzinski
- Division of Pediatric Nephrology, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Yunwen Xu
- Department of Epidemiology, John's Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Derek K Ng
- Department of Epidemiology, John's Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Susan L Furth
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - George J Schwartz
- Division of Pediatric Nephrology, University of Rochester Medical Center, Rochester, NY, USA
| | - Bradley A Warady
- Division of Pediatric Nephrology, Children's Mercy Kansas City, Kansas City, MO, USA.
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21
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Ng DK, Carroll MK, Furth SL, Warady BA, Flynn JT. Blood Pressure Classification Status in Children With CKD Following Adoption of the 2017 American Academy of Pediatrics Guideline. Am J Kidney Dis 2023; 81:545-553. [PMID: 36521780 PMCID: PMC10122698 DOI: 10.1053/j.ajkd.2022.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 10/04/2022] [Indexed: 12/14/2022]
Abstract
RATIONALE & OBJECTIVE Accurate detection of hypertension is crucial for clinical management of pediatric chronic kidney disease (CKD). The 2017 American Academy of Pediatrics (AAP) clinical practice guideline for childhood hypertension included new normative blood pressure (BP) values and revised definitions of BP categories. In this study, we examined the effect of applying the AAP guideline's normative data and definitions to the Chronic Kidney Disease in Children (CKiD) cohort compared with use of normative data and definitions from the 2004 Fourth Report on the Diagnosis, Evaluation, and Treatment of High Blood Pressure in Children and Adolescents. STUDY DESIGN Observational cohort study. SETTING & PARTICIPANTS Children and adolescents in the CKiD cohort. EXPOSURE Clinic BP measurements. OUTCOME BP percentiles and hypertension stages calculated using the 2017 AAP guideline and the Fourth Report from 2004. ANALYTICAL APPROACH Agreement analysis compared the estimated percentile and prevalence of high BP based on the 2017 guideline and 2004 report to clinic and combined ambulatory BP readings. RESULTS The proportion of children classified as having normal clinic BP was similar using the 2017 and 2004 systems, but the use of the 2017 normative data classified more participants as having stages 1-2 hypertension (22% vs 11%), with marginal reproducibility (κ=0.569 [95% CI, 0.538-0.599]). Those identified as having stage 2 hypertension by the 2017 guideline had higher levels of proteinuria compared with those identified using the 2004 report. Comparing use of the 2017 guideline and the 2004 report in terms of ambulatory BP monitoring categories, there were substantially more participants with white coat (3.5% vs 1.5%) and ambulatory (15.5% vs 7.9%) hypertension, but the proportion with masked hypertension was lower (40.2% vs 47.8%, respectively), and the percentage of participants who were normotensive was similar (40.9% vs 42.9%, respectively). Overall, there was good reproducibility (κ=0.799 [95% CI, 0.778-0.819]) of classification by ambulatory BP monitoring. LIMITATIONS Relationship with long-term progression and target organ damage was not assessed. CONCLUSIONS A greater percentage of children with CKD were identified as having hypertension based on both clinic and ambulatory BP when using the 2017 AAP guideline versus the Fourth Report from 2004, and the 2017 guideline better discriminated those with higher levels of proteinuria. The substantial differences in the classification of hypertension when using the 2017 guideline should inform clinical care.
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Affiliation(s)
- Derek K Ng
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Megan K Carroll
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Susan L Furth
- Division of Nephrology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Bradley A Warady
- Division of Nephrology, Department of Pediatrics, Children's Mercy Kansas City, Kansas City, Missouri
| | - Joseph T Flynn
- Division of Nephrology, Seattle Children's Hospital; Department of Pediatrics, School of Medicine, University of Washington, Seattle, Washington.
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22
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Douglas CE, Roem J, Flynn JT, Furth SL, Warady BA, Halbach SM. Effect of Age on Hypertension Recognition in Children With Chronic Kidney Disease: A Report From the Chronic Kidney Disease in Children Study. Hypertension 2023; 80:1048-1056. [PMID: 36861464 PMCID: PMC10133176 DOI: 10.1161/hypertensionaha.122.20354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 02/20/2023] [Indexed: 03/03/2023]
Abstract
BACKGROUND Young age has been associated with poorer control of hypertension in children with chronic kidney disease (CKD). Using data from the CKiD Study (Chronic Kidney Disease in Children), we examined the relationship between age, hypertensive blood pressure (BP) recognition, and pharmacologic BP control in children with nondialysis-dependent CKD. METHODS Participants included 902 CKiD Study participants with CKD stages 2 to 4. A total of 3550 annual study visits met inclusion criteria and participants were stratified by age (0 to <7, ≥7 to <13, ≥13 to ≤18 years). Generalized estimating equations to account for repeated measures were applied to logistic regression analyses to evaluate the association of age with unrecognized hypertensive BP and medication use. RESULTS Children <7 years of age had a higher prevalence of hypertensive BP and a lower prevalence of antihypertensive medication use compared with older children. At visits where participants <7 years of age had hypertensive BP readings, 46% had unrecognized, untreated hypertensive BP compared with 21% of visits for children ≥13 years of age. The youngest age group was associated with higher odds of unrecognized hypertensive BP (adjusted odds ratio, 2.11 [95% CI, 1.37-3.24]) and lower odds of antihypertensive medication use among those with unrecognized hypertensive BP (adjusted OR, 0.51 [95% CI, 0.27-0.996]). CONCLUSIONS Children younger than 7 years of age with CKD are more likely to have both undiagnosed and undertreated hypertensive BP. Efforts to improve BP control in young children with CKD are needed to minimize development of cardiovascular disease and slow CKD progression.
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Affiliation(s)
| | - Jennifer Roem
- Department of Epidemiology, Johns Hopkins Bloomberg School
of Public Health, Baltimore, MD
| | - Joseph T Flynn
- Division of Nephrology, Seattle Children’s Hospital,
WA
- Department of Pediatrics, University of Washington School
of Medicine, Seattle
| | - Susan L Furth
- Departments of Pediatrics and Epidemiology, Perelman School
of Medicine at the University of Pennsylvania, Division of Nephrology, Children's
Hospital of Philadelphia
| | - Bradley A Warady
- Division of Pediatric Nephrology, Children’s Mercy
Kansas City, MO
| | - Susan M Halbach
- Division of Nephrology, Seattle Children’s Hospital,
WA
- Department of Pediatrics, University of Washington School
of Medicine, Seattle
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23
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Warady BA, Feldman DL, Bell LE, Bacchetta J, Denburg MR, Flynn JT, Haffner D, Johnson RJ, Mitsnefes MM, Schaefer F, Jaure A, Furth SL. Improving Clinical Care for Children With CKD: A Report From a National Kidney Foundation Scientific Workshop. Am J Kidney Dis 2023; 81:466-474. [PMID: 36410592 DOI: 10.1053/j.ajkd.2022.09.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 09/14/2022] [Indexed: 11/22/2022]
Abstract
Development of clinical guidelines and recommendations to address the care of pediatric patients with chronic kidney disease (CKD) has rarely included the perspectives of providers from a variety of health care disciplines or the patients and parents themselves. Accordingly, the National Kidney Foundation hosted an in-person, one and a half-day workshop that convened a multidisciplinary group of physicians, allied health care professionals, and pediatric patients with CKD and their parents, with the goal of developing key clinical recommendations regarding best practices for the clinical management of pediatric patients living with CKD. The key clinical recommendations pertained to 5 broad topics: addressing the needs of patients and parents/caregivers; modifying the progression of CKD; clinical management of CKD-mineral and bone disorder and growth retardation; clinical management of anemia, cardiovascular disease, and hypertension; and transition and transfer of pediatric patients to adult nephrology care. This report describes the recommendations generated by the participants who attended the workshop.
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Affiliation(s)
- Bradley A Warady
- Division of Pediatric Nephrology, Children's Mercy Kansas City, Kansas City, Missouri.
| | | | - Lorraine E Bell
- Department of Pediatrics, McGill University Health Centre, Montreal, Quebec, Canada
| | - Justine Bacchetta
- Department of Pediatric Nephrology Rheumatology and Dermatology, Reference Center for Rare Renal Diseases, INSERM 1033, Hospices Civils de Lyon, Lyon, France
| | - Michelle R Denburg
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, and Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Joseph T Flynn
- Department of Pediatrics, University of Washington School of Medicine and Seattle Children's Hospital, Seattle, Washington
| | - Dieter Haffner
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School Children's Hospital, Hannover
| | - Rebecca J Johnson
- Division of Developmental and Behavioral Health, Children's Mercy Kansas City, Kansas City, Missouri
| | - Mark M Mitsnefes
- Division of Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Franz Schaefer
- Pediatric Nephrology Division, Heidelberg University Medical Center, Heidelberg, Germany
| | - Allison Jaure
- School of Public Health, University of Sydney and The Children's Hospital at Westmead, Westmead, NSW, Australia
| | - Susan L Furth
- Division Pediatric Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
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24
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Akchurin O, Molino AR, Schneider MF, Atkinson MA, Warady BA, Furth SL. Longitudinal Relationship Between Anemia and Statural Growth Impairment in Children and Adolescents With Nonglomerular CKD: Findings From the Chronic Kidney Disease in Children (CKiD) Study. Am J Kidney Dis 2023; 81:457-465.e1. [PMID: 36481700 PMCID: PMC10038884 DOI: 10.1053/j.ajkd.2022.09.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 09/27/2022] [Indexed: 12/09/2022]
Abstract
RATIONALE & OBJECTIVE Anemia and statural growth impairment are both prevalent in children with nonglomerular chronic kidney disease (CKD) and are associated with poor quality of life and increased morbidity and mortality. However, to date no longitudinal studies have demonstrated a relationship between anemia and statural growth in this population. STUDY DESIGN The CKD in Children (CKiD) study is a multicenter prospective cohort study with over 15 years of follow-up observation. SETTING & PARTICIPANTS CKiD participants younger than 22 years with nonglomerular CKD who had not reached final adult height. EXPOSURE Age-, sex-, and race-specific hemoglobin z score. OUTCOME Age- and sex-specific height z score. ANALYTICAL APPROACH The relationship between hemoglobin and height was quantified using (1) multivariable repeated measures paired person-visit analysis, and (2) multivariable repeated measures linear mixed model analysis. Both models were adjusted for age, sex, body mass index, estimated glomerular filtration rate, acidosis, and medication use. RESULTS Overall, 67% of the 510 participants studied had declining hemoglobin z score trajectories over the follow-up period, which included 1,763 person-visits. Compared with average hemoglobin z scores of≥0, average hemoglobin z scores of less than -1.0 were independently associated with significant growth impairment at the subsequent study visit, with height z score decline ranging from 0.24 to 0.35. Importantly, in 50% of cases hemoglobin z scores of less than -1.0 corresponded to hemoglobin values higher than those used as cutoffs defining anemia in the KDIGO clinical practice guideline for anemia in CKD. When stratified by age, the magnitude of the association peaked in participants aged 9 years. In line with paired-visit analyses, our mixed model analysis demonstrated that in participants with baseline hemoglobin z score less than -1.0, a hemoglobin z score decline over the follow-up period was associated with a statistically significant concurrent decrease in height z score. LIMITATIONS Limited ability to infer causality. CONCLUSIONS Hemoglobin decline is associated with growth impairment over time in children with mild to moderate nonglomerular CKD, even before hemoglobin levels reach the cutoffs that are currently used to define anemia in this population.
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Affiliation(s)
- Oleh Akchurin
- Department of Pediatrics, Weill Cornell Medicine and New York-Presbyterian Hospital, New York, New York.
| | - Andrea R Molino
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Michael F Schneider
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | | | | | - Susan L Furth
- Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
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Kogon AJ, Roem J, Schneider MF, Mitsnefes MM, Zemel BS, Warady BA, Furth SL, Rodig NM. Associations of body mass index (BMI) and BMI change with progression of chronic kidney disease in children. Pediatr Nephrol 2023; 38:1257-1266. [PMID: 36018433 PMCID: PMC10044533 DOI: 10.1007/s00467-022-05655-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 06/03/2022] [Accepted: 06/03/2022] [Indexed: 10/15/2022]
Abstract
BACKGROUND Obesity is prevalent among children with chronic kidney disease (CKD) and is associated with cardiovascular disease and reduced quality of life. Its relationship with pediatric CKD progression has not been described. METHODS We evaluated relationships between both body mass index (BMI) category (normal, overweight, obese) and BMI z-score (BMIz) change on CKD progression among participants of the Chronic Kidney Disease in Children study. Kaplan-Meier survival curves and multivariable parametric failure time models depict the association of baseline BMI category on time to kidney replacement therapy (KRT). Additionally, the annualized percentage change in estimated glomerular filtration rate (eGFR) was modeled against concurrent change in BMIz using multivariable linear regression with generalized estimating equations which allowed for quantification of the effect of BMIz change on annualized eGFR change. RESULTS Participants had median age of 10.9 years [IQR: 6.5, 14.6], median eGFR of 50 ml/1.73 m2 [IQR: 37, 64] and 63% were male. 160 (27%) of 600 children with non-glomerular and 77 (31%) of 247 children with glomerular CKD progressed to KRT over a median of 5 years [IQR: 2, 8]. Times to KRT were not significantly associated with baseline BMI category. Children with non-glomerular CKD who were obese experienced significant improvement in eGFR (+ 0.62%; 95% CI: + 0.17%, + 1.08%) for every 0.1 standard deviation concurrent decrease in BMI. In participants with glomerular CKD who were obese, BMIz change was not significantly associated with annualized eGFR change. CONCLUSION Obesity may represent a target of intervention to improve kidney function in children with non-glomerular CKD. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Amy J Kogon
- Pediatrics, Division of Nephrology, Children's Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania Philadelphia, Philadelphia, PA, USA.
| | - Jennifer Roem
- Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Michael F Schneider
- Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Mark M Mitsnefes
- Pediatrics, Division of Nephrology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Babette S Zemel
- Pediatrics, Division of Gastroenterology, Hepatology and Nutrition, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA, USA
| | - Bradley A Warady
- Pediatrics, Division of Nephrology, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Susan L Furth
- Pediatrics, Division of Nephrology, Children's Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania Philadelphia, Philadelphia, PA, USA
| | - Nancy M Rodig
- Pediatrics, Division of Nephrology, Boston Children's Hospital, Boston, MA, USA
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Ren X, Chen J, Abraham AG, Xu Y, Siewe A, Warady BA, Rhee EP, Furth SL, Coresh J, Denburg M, Rebholz CM. Abstract P212: Plasma Metabolomics of Dietary Intake of Protein-Rich Foods and Kidney Disease Progression in Children. Circulation 2023. [DOI: 10.1161/circ.147.suppl_1.p212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
Abstract
Introduction:
There is inconsistent evidence on the efficacy of a low-protein diet for patients with chronic kidney disease (CKD) and there is a lack of objective biomarkers of dietary intake. The purpose of this study was to identify plasma metabolites associated with dietary intake of protein among children with CKD and to assess whether protein-related metabolites are associated with CKD progression.
Methods:
We conducted non-targeted metabolomics using plasma samples from 484 Chronic Kidney Disease in Children (CKiD) participants. Multivariable linear regression estimated the cross-sectional association between 949 known, non-drug metabolites and dietary intake of dairy, nuts and beans, red and processed meat, fish, chicken, and eggs, adjusting for demographic, clinical, and dietary covariates. Cox proportional hazards regression models assessed the prospective association between protein-related metabolites and CKD progression defined as kidney replacement therapy or 50% eGFR reduction, adjusting for demographic and clinical covariates. We used a false discovery rate <0.05 as the statistical significance threshold to account for multiple comparisons.
Results:
Fifty-seven unique metabolites were significantly associated with dietary protein intake (dairy: n=21; nuts and beans: n=13; red and processed meat: n=20; fish: n=2; chicken: n=3; eggs: n=0). Among them, ten metabolites were significantly associated with CKD progression
(TABLE)
, including one amino acid, one cofactor and vitamin, four lipids, two nucleotides, one peptide, and one xenobiotic. 1-(1-enyl-palmitoyl)-2-oleoyl-GPE (P-16:0/18:1) was positively associated with dietary intake of red and processed meat and CKD progression, and 3-ureidopropionate was inversely associated with dietary intake of red and processed meat and CKD progression.
Conclusion:
Untargeted plasma metabolomic profiling revealed metabolites associated with dietary intake of protein and CKD progression in a pediatric population.
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Affiliation(s)
- Xuyuehe Ren
- Johns Hopkins Bloomberg Sch of Public Health, Baltimore, MD
| | - Jingsha Chen
- Johns Hopkins Bloomberg Sch of Public Health, Baltimore, MD
| | | | - Yunwen Xu
- Johns Hopkins Bloomberg Sch of Public Health, Baltimore, MD
| | - Aisha Siewe
- Johns Hopkins Bloomberg Sch of Public Health, Baltimore, MD
| | | | | | - Susan L Furth
- The Children’s Hosp of Philadelphia, Philadelphia, PA
| | - Josef Coresh
- Johns Hopkins Bloomberg Sch of Public Health, Baltimore, MD
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Schwartz GJ, Roem JL, Hooper SR, Furth SL, Weaver DJ, Warady BA, Schneider MF. Longitudinal changes in uric acid concentration and their relationship with chronic kidney disease progression in children and adolescents. Pediatr Nephrol 2023; 38:489-497. [PMID: 35650320 PMCID: PMC9712592 DOI: 10.1007/s00467-022-05620-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/29/2022] [Accepted: 05/04/2022] [Indexed: 01/10/2023]
Abstract
BACKGROUND Elevated serum uric acid concentration is a risk factor for CKD progression. Its change over time and association with CKD etiology and concomitant changes in estimated glomerular filtration rate (eGFR) in children and adolescents are unknown. METHODS Longitudinal study of 153 children/adolescents with glomerular (G) and 540 with non-glomerular (NG) etiology from the CKD in Children (CKiD) study. Baseline serum uric acid, change in uric acid and eGFR over time, CKD etiology, and comorbidities were monitored. Adjusted linear mixed-effects regression models quantified the relationship between within-person changes in uric acid and concurrent within-person changes in eGFR. RESULTS Participants with stable uric acid over follow-up had CKD progression which became worse for increased baseline uric acid (average annual percentage changes in eGFR were - 1.4%, - 7.7%, and - 14.7% in those with G CKD with baseline uric acid < 5.5 mg/dL, 5.5 - 7.5 mg/dL, and > 7.5 mg/dL, respectively; these changes were - 1.4%, - 4.1%, and - 8.6% in NG CKD). Each 1 mg/dL increase in uric acid over follow-up was independently associated with significant concomitant eGFR decreases of - 5.7% (95%CI - 8.4 to - 3.0%) (G) and - 5.1% (95%CI - 6.3 to - 4.0%) (NG) for those with baseline uric acid < 5.5 mg/dL and - 4.3% (95%CI - 6.8 to - 1.6%) (G) and - 3.3% (95%CI - 4.1 to - 2.6%) (NG) with baseline uric acid between 5.5 and 7.5 mg/dL. CONCLUSIONS Higher uric acid levels and increases in uric acid over time are risk factors for more severe progression of CKD in children and adolescents. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- George J Schwartz
- Pediatrics, University of Rochester Medical Center, 601 Elmwood Avenue Box 777, Rochester, NY, USA.
| | - Jennifer L Roem
- Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Stephen R Hooper
- Allied Health Sciences, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA
| | - Susan L Furth
- Pediatrics, University of Pennsylvania, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Donald J Weaver
- Pediatrics, Atrium Health Levine Hospital, Charlotte, NC, USA
| | - Bradley A Warady
- Pediatrics, University of Missouri-Kansas City School of Medicine, Children's Mercy Hospital, Kansas City, MO, USA
| | - Michael F Schneider
- Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
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Gluck CA, Forrest CB, Davies AG, Maltenfort M, Mcdonald JR, Mitsnefes M, Dharnidharka VR, Dixon BP, Flynn JT, Somers MJ, Smoyer WE, Neu A, Hovinga CA, Skversky AL, Eissing T, Kaiser A, Breitenstein S, Furth SL, Denburg MR. Evaluating Kidney Function Decline in Children with Chronic Kidney Disease Using a Multi-Institutional Electronic Health Record Database. Clin J Am Soc Nephrol 2023; 18:173-182. [PMID: 36754006 PMCID: PMC10103199 DOI: 10.2215/cjn.0000000000000051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 12/03/2022] [Indexed: 01/22/2023]
Abstract
BACKGROUND The objectives of this study were to use electronic health record data from a US national multicenter pediatric network to identify a large cohort of children with CKD, evaluate CKD progression, and examine clinical risk factors for kidney function decline. METHODS This retrospective cohort study identified children seen between January 1, 2009, to February 28, 2022. Data were from six pediatric health systems in PEDSnet. We identified children aged 18 months to 18 years who met criteria for CKD: two eGFR values <90 and ≥15 ml/min per 1.73 m2 separated by ≥90 days without an intervening value ≥90. CKD progression was defined as a composite outcome: eGFR <15 ml/min per 1.73 m2, ≥50% eGFR decline, long-term dialysis, or kidney transplant. Subcohorts were defined based on CKD etiology: glomerular, nonglomerular, or malignancy. We assessed the association of hypertension (≥2 visits with hypertension diagnosis code) and proteinuria (≥1 urinalysis with ≥1+ protein) within 2 years of cohort entrance on the composite outcome. RESULTS Among 7,148,875 children, we identified 11,240 (15.7 per 10,000) with CKD (median age 11 years, 50% female). The median follow-up was 5.1 (interquartile range 2.8-8.3) years, the median initial eGFR was 75.3 (interquartile range 61-83) ml/min per 1.73 m2, 37% had proteinuria, and 35% had hypertension. The following were associated with CKD progression: lower eGFR category (adjusted hazard ratio [aHR] 1.44 [95% confidence interval (95% CI), 1.23 to 1.69], aHR 2.38 [95% CI, 2.02 to 2.79], aHR 5.75 [95% CI, 5.05 to 6.55] for eGFR 45-59 ml/min per 1.73 m2, 30-44 ml/min per 1.73 m2, 15-29 ml/min per 1.73 m2 at cohort entrance, respectively, when compared with eGFR 60-89 ml/min per 1.73 m2), glomerular disease (aHR 2.01 [95% CI, 1.78 to 2.28]), malignancy (aHR 1.79 [95% CI, 1.52 to 2.11]), proteinuria (aHR 2.23 [95% CI, 1.89 to 2.62]), hypertension (aHR 1.49 [95% CI, 1.22 to 1.82]), proteinuria and hypertension together (aHR 3.98 [95% CI, 3.40 to 4.68]), count of complex chronic comorbidities (aHR 1.07 [95% CI, 1.05 to 1.10] per additional comorbid body system), male sex (aHR 1.16 [95% CI, 1.05 to 1.28]), and younger age at cohort entrance (aHR 0.95 [95% CI, 0.94 to 0.96] per year older). CONCLUSIONS In large-scale real-world data for children with CKD, disease etiology, albuminuria, hypertension, age, male sex, lower eGFR, and greater medical complexity at start of follow-up were associated with more rapid decline in kidney function.
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Affiliation(s)
- Caroline A. Gluck
- Division of Pediatric Nephrology, Nemours Children's Health, Wilmington, Delaware
| | - Christopher B. Forrest
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Amy Goodwin Davies
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Mitchell Maltenfort
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Jill R. Mcdonald
- Applied Clinical Research Center, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Mark Mitsnefes
- Division of Pediatric Nephrology, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio
| | - Vikas R. Dharnidharka
- Division of Pediatric Nephrology, Hypertension, Pheresis, St. Louis Children's Hospital, Washington University in St. Louis, St. Louis, Missouri
| | - Bradley P. Dixon
- Division of Pediatric Nephrology, University of Colorado School of Medicine, Aurora, Colorado
| | - Joseph T. Flynn
- Division of Pediatric Nephrology, Seattle Children's Hospital, Seattle, Washington
| | - Michael J. Somers
- Division of Pediatric Nephrology, Boston Children's, Boston, Massachusetts
| | - William E. Smoyer
- Division of Pediatric Nephrology, Nationwide Children's Hospital, Columbus, Ohio
| | - Alicia Neu
- Division of Pediatric Nephrology, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Collin A. Hovinga
- Clinical and Scientific Development, Institute for Advanced Clinical Trials for Children, Rockville, Maryland
| | - Amy L. Skversky
- Bayer AG, Pharmaceuticals Research & Development, Leverkusen/Wuppertal/Berlin, Germany
| | - Thomas Eissing
- Bayer AG, Pharmaceuticals Research & Development, Leverkusen/Wuppertal/Berlin, Germany
| | - Andreas Kaiser
- Bayer AG, Pharmaceuticals Research & Development, Leverkusen/Wuppertal/Berlin, Germany
| | - Stefanie Breitenstein
- Bayer AG, Pharmaceuticals Research & Development, Leverkusen/Wuppertal/Berlin, Germany
| | - Susan L. Furth
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Michelle R. Denburg
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
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Collaco JM, St Geme JW, Abman SH, Furth SL. It Takes a Team to Make Team Science a Success: Career Development within Multicenter Networks. J Pediatr 2023; 252:3-6.e1. [PMID: 36049523 DOI: 10.1016/j.jpeds.2022.08.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 08/24/2022] [Indexed: 11/16/2022]
Affiliation(s)
- Joseph M Collaco
- Department of Pediatrics, Johns Hopkins Medical Institutions, Baltimore, MD.
| | - Joseph W St Geme
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA; Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Steven H Abman
- Department of Pediatrics, University of Colorado School of Medicine and Children's Hospital Colorado, Aurora, CO
| | - Susan L Furth
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA; Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
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Fleischer LT, Ballester L, Dutt M, Howarth K, Poznick L, Darge K, Furth SL, Hartung EA. Evaluation of galectin-3 and intestinal fatty acid binding protein as serum biomarkers in autosomal recessive polycystic kidney disease. J Nephrol 2023; 36:133-145. [PMID: 35980535 DOI: 10.1007/s40620-022-01416-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 07/27/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND Autosomal recessive polycystic kidney disease (ARPKD) causes fibrocystic kidney disease, congenital hepatic fibrosis, and portal hypertension. Serum galectin-3 (Gal-3) and intestinal fatty acid binding protein (I-FABP) are potential biomarkers of kidney fibrosis and portal hypertension, respectively. We examined whether serum Gal-3 associates with kidney disease severity and serum I-FABP associates with liver disease severity in ARPKD. METHODS Cross-sectional study of 29 participants with ARPKD (0.2-21 years old) and presence of native kidneys (Gal-3 analyses, n = 18) and/or native livers (I-FABP analyses, n = 21). Serum Gal-3 and I-FABP were analyzed using enzyme linked immunosorbent assay. Kidney disease severity variables included estimated glomerular filtration rate (eGFR) and height-adjusted total kidney volume (htTKV). Liver disease severity was characterized using ultrasound elastography to measure liver fibrosis, and spleen length and platelet count as markers of portal hypertension. Simple and multivariable linear regression examined associations between Gal-3 and kidney disease severity (adjusted for liver disease severity) and between I-FABP and liver disease severity (adjusted for eGFR). RESULTS Serum Gal-3 was negatively associated with eGFR; 1 standard deviation (SD) lower eGFR was associated with 0.795 SD higher Gal-3 level (95% CI - 1.116, - 0.473; p < 0.001). This association remained significant when adjusted for liver disease severity. Serum Gal-3 was not associated with htTKV in adjusted analyses. Overall I-FABP levels were elevated, but there were no linear associations between I-FABP and liver disease severity in unadjusted or adjusted models. CONCLUSIONS Serum Gal-3 is associated with eGFR in ARPKD, suggesting its value as a possible novel biomarker of kidney disease severity. We found no associations between serum I-FABP and ARPKD liver disease severity despite overall elevated I-FABP levels.
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Affiliation(s)
| | - Lance Ballester
- Biostatistics and Data Management Core, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Mohini Dutt
- Division of Nephrology, Children's Hospital of Philadelphia, 3401 Civic Center Boulevard, Philadelphia, PA, 19104, USA
| | - Kathryn Howarth
- Division of Nephrology, Children's Hospital of Philadelphia, 3401 Civic Center Boulevard, Philadelphia, PA, 19104, USA
| | - Laura Poznick
- Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Kassa Darge
- Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, PA, USA.,Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Susan L Furth
- Division of Nephrology, Children's Hospital of Philadelphia, 3401 Civic Center Boulevard, Philadelphia, PA, 19104, USA.,Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Erum A Hartung
- Division of Nephrology, Children's Hospital of Philadelphia, 3401 Civic Center Boulevard, Philadelphia, PA, 19104, USA. .,Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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Goodwin Davies AJ, Xiao R, Razzaghi H, Bailey LC, Utidjian L, Gluck C, Eckrich D, Dixon BP, Deakyne Davies SJ, Flynn JT, Ranade D, Smoyer WE, Kitzmiller M, Dharnidharka VR, Magnusen B, Mitsnefes M, Somers M, Claes DJ, Burrows EK, Luna IY, Furth SL, Forrest CB, Denburg MR. Skeletal Outcomes in Children and Young Adults with Glomerular Disease. J Am Soc Nephrol 2022; 33:2233-2246. [PMID: 36171052 PMCID: PMC9731624 DOI: 10.1681/asn.2021101372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 08/10/2022] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Children with glomerular disease have unique risk factors for compromised bone health. Studies addressing skeletal complications in this population are lacking. METHODS This retrospective cohort study utilized data from PEDSnet, a national network of pediatric health systems with standardized electronic health record data for more than 6.5 million patients from 2009 to 2021. Incidence rates (per 10,000 person-years) of fracture, slipped capital femoral epiphysis (SCFE), and avascular necrosis/osteonecrosis (AVN) in 4598 children and young adults with glomerular disease were compared with those among 553,624 general pediatric patients using Poisson regression analysis. The glomerular disease cohort was identified using a published computable phenotype. Inclusion criteria for the general pediatric cohort were two or more primary care visits 1 year or more apart between 1 and 21 years of age, one visit or more every 18 months if followed >3 years, and no chronic progressive conditions defined by the Pediatric Medical Complexity Algorithm. Fracture, SCFE, and AVN were identified using SNOMED-CT diagnosis codes; fracture required an associated x-ray or splinting/casting procedure within 48 hours. RESULTS We found a higher risk of fracture for the glomerular disease cohort compared with the general pediatric cohort in girls only (incidence rate ratio [IRR], 1.6; 95% CI, 1.3 to 1.9). Hip/femur and vertebral fracture risk were increased in the glomerular disease cohort: adjusted IRR was 2.2 (95% CI, 1.3 to 3.7) and 5 (95% CI, 3.2 to 7.6), respectively. For SCFE, the adjusted IRR was 3.4 (95% CI, 1.9 to 5.9). For AVN, the adjusted IRR was 56.2 (95% CI, 40.7 to 77.5). CONCLUSIONS Children and young adults with glomerular disease have significantly higher burden of skeletal complications than the general pediatric population.
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Affiliation(s)
- Amy J Goodwin Davies
- Division of General Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Rui Xiao
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Hanieh Razzaghi
- Division of General Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - L Charles Bailey
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Levon Utidjian
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Caroline Gluck
- Division of Nephrology, Nemours/Alfred I. DuPont Hospital for Children, Wilmington, Delaware
| | - Daniel Eckrich
- Division of Nephrology, Nemours/Alfred I. DuPont Hospital for Children, Wilmington, Delaware
| | - Bradley P Dixon
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
- Children's Hospital Colorado, Aurora, Colorado
| | | | - Joseph T Flynn
- Department of Pediatrics, University of Washington, Seattle, Washington
- Seattle Children's Hospital, Seattle, Washington
| | | | - William E Smoyer
- Department of Pediatrics, The Ohio State University, Columbus, Ohio
- Nationwide Children's Hospital, Columbus, Ohio
| | | | - Vikas R Dharnidharka
- Department of Pediatrics, Washington University in St. Louis, St. Louis, Missouri
- St. Louis Children's Hospital, St. Louis, Missouri
| | | | - Mark Mitsnefes
- Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, Ohio
| | - Michael Somers
- Boston Children's Hospital, Harvard University, Boston, Massachusetts
| | - Donna J Claes
- Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, Ohio
| | - Evanette K Burrows
- Division of General Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Ingrid Y Luna
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Susan L Furth
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Christopher B Forrest
- Division of General Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Michelle R Denburg
- Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Center for Pediatric Clinical Effectiveness, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
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Bakhoum CY, Phadke M, Deng Y, Samuels JA, Garimella PS, Furth SL, Wilson FP, Ix JH. Nocturnal Dipping and Kidney Function Decline: Findings From the CKD in Children Study. Kidney Int Rep 2022; 7:2446-2453. [PMID: 36531891 PMCID: PMC9751682 DOI: 10.1016/j.ekir.2022.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/02/2022] [Accepted: 08/08/2022] [Indexed: 10/15/2022] Open
Abstract
Introduction Normally, blood pressure (BP) declines by at least 10% from daytime to nighttime. In adults, blunted nocturnal dipping has been associated with more rapid decline in kidney function. Nondipping is prevalent in children with chronic kidney disease (CKD). We sought to determine whether nondipping is associated with proteinuria and progression to kidney failure in children with CKD. Methods In the prospective CKD in children (CKiD) cohort, Cox proportional hazards models were used to evaluate the relationship between baseline nondipping and progression to kidney failure. Linear mixed effects models were used to evaluate the relationship between nondipping and changes in iohexol glomerular filtration rate (GFR) and urine protein-to-creatinine ratio (log-UPCR, mg/mg) over time. Results Among 620 participants, mean age was 11 (± 4) years, mean iohexol GFR was 52 (± 22) ml/min per 1.73 m2, and 40% were nondippers at baseline. There were 169 kidney failure events during 2.9 years (median) of follow-up. Dipping status was not significantly associated with kidney failure overall (hazard ratio [HR] 1.08; 95% confidence interval [CI] 0.77, 1.51) or in those with (HR 1.21; 95% CI 0.53, 2.77) or without (HR 1.05; 95% CI 0.71, 1.55) glomerular disease. Dipping status did not modify the relationship between time and change in iohexol GFR or log (UPCR) from baseline (interaction P values = 0.20 and 0.054, respectively). Conclusion Nondipping is not associated with end-stage kidney disease, GFR decline, or change in proteinuria within the CKiD cohort.
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Affiliation(s)
- Christine Y. Bakhoum
- Department of Pediatrics, Section of Pediatric Nephrology, Yale University, New Haven, Connecticut, USA
| | - Manali Phadke
- Yale School of Public Health, Yale University, New Haven, Connecticut, USA
| | - Yanhong Deng
- Yale School of Public Health, Yale University, New Haven, Connecticut, USA
| | - Joshua A. Samuels
- Division of Pediatric Nephrology and Hypertension, McGovern Medical School at UTHealth, Houston, Texas, USA
| | - Pranav S. Garimella
- Division of Nephrology and Hypertension, Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Susan L. Furth
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Division of Nephrology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - F. Perry Wilson
- Department of Internal Medicine, Clinical and Translational Research Accelerator, Yale University, New Haven, Connecticut, USA
| | - Joachim H. Ix
- Division of Nephrology and Hypertension, Department of Medicine, University of California San Diego, La Jolla, California, USA
- Nephrology Section, Medicine Service, Veterans Affairs San Diego Health Care System, La Jolla, California, USA
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Bakhoum CY, Matheson MB, Greenberg JH, Furth SL, Ix JH, Garimella PS. Urine Uromodulin Is Not Associated With Blood Pressure in the Chronic Kidney Disease in Children Cohort. Hypertension 2022; 79:2298-2304. [PMID: 35920156 PMCID: PMC9458625 DOI: 10.1161/hypertensionaha.122.19566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 07/12/2022] [Indexed: 11/16/2022]
Abstract
BACKGROUND Uromodulin regulates activity of the sodium-potassium-two-chloride transporter in the loop of Henle. In adults, higher urine uromodulin levels are associated with greater rise in blood pressure (BP) in response to salt intake. We hypothesized that higher urine uromodulin levels would be associated with higher BP in children with chronic kidney disease, and that there would be an interaction of dietary sodium on this association. METHODS In the chronic kidney disease in children Cohort, we utilized univariable and multivariable linear regression models to evaluate the relationship between baseline spot urine uromodulin levels indexed to urine creatinine (Umod/Cr mg/g) and 24-hour mean systolic and diastolic BP, as well as baseline clinic BP. We also tested whether sodium intake (g/day) modified these relationships. RESULTS Among 436 participants, the median age was 12.4 years (8.9-15.2), median estimated glomerular filtration rate was 50 mL/min per 1.73 m2 (36-62), and median 24-hour mean systolic BP was 112 mm Hg (104-119). The etiology of chronic kidney disease was glomerular disease in 27%. In univariable models, each 2-fold higher Umod/Cr ratio was associated with a 1.66 mm Hg (95% CI, -2.31 to -1.00) lower 24-hour mean systolic and a 1.71 mm Hg (-2.45 to -0.97) lower clinic systolic BP. However, there was no statistically significant association between Umod/Cr and either 24-hour or clinic BP in multivariable models. We did not find a significant interaction between uromodulin and sodium intake in their effect on BP (P>0.05 in all models). CONCLUSIONS Urine uromodulin levels are not associated with BP in the chronic kidney disease in children cohort. Further studies are needed to confirm this finding in healthy pediatric cohorts.
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Affiliation(s)
- Christine Y Bakhoum
- Department of Pediatrics, Section of Pediatric Nephrology, Yale University, New Haven, CT (C.Y.B., J.H.G.)
| | - Matthew B Matheson
- Bloomberg School of Public Health, John Hopkins University, Baltimore, MD (M.B.M.)
| | - Jason H Greenberg
- Department of Pediatrics, Section of Pediatric Nephrology, Yale University, New Haven, CT (C.Y.B., J.H.G.)
| | - Susan L Furth
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania and Division of Nephrology, Children's Hospital of Philadelphia (S.L.F.)
| | - Joachim H Ix
- Nephrology Section, Medicine Service, Veterans Affairs San Diego Healthcare System, La Jolla, CA (J.H.I.)
| | - Pranav S Garimella
- Division of Nephrology and Hypertension, Department of Medicine, University of California San Diego, La Jolla (J.H.I., P.S.G.)
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Guzman-Limon ML, Jiang S, Ng D, Flynn JT, Warady B, Furth SL, Samuels JA. Nocturnal Hypertension in Children With Chronic Kidney Disease Is Common and Associated With Progression to Kidney Replacement Therapy. Hypertension 2022; 79:2288-2297. [PMID: 35979846 PMCID: PMC9458620 DOI: 10.1161/hypertensionaha.121.18101] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 06/17/2022] [Indexed: 11/16/2022]
Abstract
BACKGROUND Nocturnal hypertension is a risk factor for chronic kidney disease (CKD) progression among adults. In children, effects of nocturnal hypertension on CKD progression is less studied. METHODS We investigated the relationships between nocturnal, daytime, or sustained hypertension and progression to kidney replacement therapy in children using Cox proportional hazards models. Nocturnal and diurnal hypertension respectively defined as: mean blood pressure >95th percentile and/or load >25% for either systolic or diastolic blood pressure within sleep or wake periods. RESULTS One thousand five hundred seventy-seven ambulatory blood pressure monitoring studies from 701 CKiD participants were reviewed. Nighttime, daytime, and both types of hypertension were 19%, 7%, and 33%, respectively. Participants with both daytime and nocturnal hypertension had the highest risk of kidney replacement therapy. Among children with CKD, compared with those who were normotensive, those with isolated nocturnal hypertension had a hazard ratio of 1.49 ([CI, 0.97-2.28]; P=0.068) while those with both daytime and nocturnal hypertension had a HR of 2.23 ([CI, 1.60-3.11]; P<0.001) when adjusted for age, race, sex, and baseline proteinuria and glomerular filtration. Estimates for risk were similar among glomerular and nonglomerular participants but not significant in glomerular due to smaller sample size. CONCLUSIONS The presence of both daytime and nocturnal hypertension is significantly associated with risk of kidney replacement therapy. Our study confirms the utility of ambulatory blood pressure monitoring in children with CKD. Identifying and controlling both daytime and nocturnal hypertension using ambulatory blood pressure monitoring may improve outcomes and delay CKD progression in this population.
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Affiliation(s)
- Monica L Guzman-Limon
- McGovern Medical School at UTHealth, Pediatric Nephrology & Hypertension, Houston, TX (M.L.G.-L., J.A.S.)
| | - Shuai Jiang
- Johns Hopkins University, Baltimore, MD (S.J., D.N.)
| | - Derek Ng
- Johns Hopkins University, Baltimore, MD (S.J., D.N.)
| | - Joseph T Flynn
- Department of Pediatrics, University of Washington, and Division of Nephrology, Seattle Children's Hospital, WA (J.T.F.)
| | | | - Susan L Furth
- The Children's Hospital of Philadelphia, PA (S.L.F.)
| | - Joshua A Samuels
- McGovern Medical School at UTHealth, Pediatric Nephrology & Hypertension, Houston, TX (M.L.G.-L., J.A.S.)
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Bae S, Samuels JA, Flynn JT, Mitsnefes MM, Furth SL, Warady BA, Ng DK. Machine Learning-Based Prediction of Masked Hypertension Among Children With Chronic Kidney Disease. Hypertension 2022; 79:2105-2113. [PMID: 35862083 PMCID: PMC9378451 DOI: 10.1161/hypertensionaha.121.18794] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Ambulatory blood pressure monitoring (ABPM) is routinely performed in children with chronic kidney disease to identify masked hypertension, a risk factor for accelerated chronic kidney disease progression. However, ABPM is burdensome, and developing an accurate prediction of masked hypertension may allow using ABPM selectively rather than routinely. METHODS To create a prediction model for masked hypertension using clinic blood pressure (BP) and other clinical characteristics, we analyzed 809 ABPM studies with nonhypertensive clinic BP among the participants of the Chronic Kidney Disease in Children study. RESULTS Masked hypertension was identified in 170 (21.0%) observations. We created prediction models for masked hypertension via gradient boosting, random forests, and logistic regression using 109 candidate predictors and evaluated its performance using bootstrap validation. The models showed C statistics from 0.660 (95% CI, 0.595-0.707) to 0.732 (95% CI, 0.695-0.786) and Brier scores from 0.148 (95% CI, 0.141-0.154) to 0.167 (95% CI, 0.152-0.183). Using the possible thresholds identified from this model, we stratified the dataset by clinic systolic/diastolic BP percentiles. The prevalence of masked hypertension was the lowest (4.8%) when clinic systolic/diastolic BP were both <20th percentile, and relatively low (9.0%) with clinic systolic BP<20th and diastolic BP<80th percentiles. Above these thresholds, the prevalence was higher with no discernable pattern. CONCLUSIONS ABPM could be used selectively in those with low clinic BP, for example, systolic BP<20th and diastolic BP<80th percentiles, although careful assessment is warranted as masked hypertension was not completely absent even in this subgroup. Above these clinic BP levels, routine ABPM remains recommended.
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Affiliation(s)
- Sunjae Bae
- Department of Surgery, Johns Hopkins University, Baltimore, Maryland
| | | | - Joseph T. Flynn
- Department of Pediatrics, University of Washington; Division of Nephrology, Seattle Children’s Hospital; Seattle, Washington
| | - Mark M. Mitsnefes
- Division of Nephrology, Department of Pediatrics, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
| | - Susan L. Furth
- Division of Nephrology, Department of Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Bradley A. Warady
- Division of Nephrology, Department of Pediatrics, Children’s Mercy Kansas City, Kansas City, Missouri
| | - Derek K. Ng
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
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Kerklaan J, Hanson CS, Carter S, Tong A, Sinha A, Dart A, Eddy AA, Guha C, Gipson DS, Bockenhauer D, Hannan E, Yap HK, Groothoff J, Zappitelli M, Amir N, Alexander SI, Furth SL, Samuel S, Gutman T, Craig JC. Perspectives of Clinicians on Shared Decision Making in Pediatric CKD: A Qualitative Study. Am J Kidney Dis 2022; 80:241-250. [PMID: 35085686 DOI: 10.1053/j.ajkd.2021.12.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 12/06/2021] [Indexed: 01/27/2023]
Abstract
RATIONALE & OBJECTIVE Clinical decision-making priorities may differ among children, their parents, and their clinicians. This study describes clinicians' perspectives on shared decision making in pediatric chronic kidney disease (CKD) and identifies opportunities to improve shared decision making and care for children with CKD and their families. STUDY DESIGN Semistructured interviews. SETTING & PARTICIPANTS Fifty clinicians participated, including pediatric nephrologists, nurses, social workers, surgeons, dietitians, and psychologists involved in providing care to children with CKD. They worked at 18 hospitals and 4 university research departments across 11 countries (United States of America, Canada, Australia, People's Republic of China, United Kingdom, Germany, France, Italy, Lithuania, New Zealand, and Singapore). ANALYTICAL APPROACH Interview transcripts were analyzed thematically. RESULTS We identified 4 themes: (1) striving to blend priorities (minimizing treatment burden, emphasizing clinical long-term risks, achieving common goals), (2) focusing on medical responsibilities (carrying decisional burden and pressure of expectations, working within system constraints, ensuring safety is foremost concern), (3) collaborating to achieve better long-term outcomes (individualizing care, creating partnerships, encouraging ownership and participation in shared decision making, sensitive to parental distress), and (4) forming cumulative knowledge (balancing reassurance and realistic expectations, building understanding around treatment, harnessing motivation for long-term goals). LIMITATIONS Most clinicians were from high-income countries, so the transferability of the findings to other settings is uncertain. CONCLUSIONS Clinicians reported striving to minimize treatment burden and working with children and their families to manage their expectations and support their decision making. However, they are challenged with system constraints and sometimes felt the pressure of being responsible for the child's long-term outcomes. Further studies are needed to test whether support for shared decision making would promote strategies to establish and improve the quality of care for children with CKD.
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Affiliation(s)
- Jasmijn Kerklaan
- Department of Pediatric Nephrology, Emma Children's Hospital, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands; Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, Australia.
| | - Camilla S Hanson
- Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, Australia; Sydney School of Public Health, University of Sydney, Sydney, Australia
| | - Simon Carter
- Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, Australia; Sydney School of Public Health, University of Sydney, Sydney, Australia
| | - Allison Tong
- Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, Australia; Sydney School of Public Health, University of Sydney, Sydney, Australia
| | - Aditi Sinha
- Division of Nephrology, Department of Pediatrics, All India Institute of Medical Sciences, Nagpur, India
| | - Allison Dart
- Department of Pediatrics and Child Health, Children's Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Allison A Eddy
- Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Chandana Guha
- Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, Australia; Sydney School of Public Health, University of Sydney, Sydney, Australia
| | - Debbie S Gipson
- Division of Nephrology, Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
| | - Detlef Bockenhauer
- Department of Renal Medicine University College London, and Great Ormond Street Hospital for Children, National Health Service Foundation Trust, London, United Kingdom
| | - Elyssa Hannan
- Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, Australia; Sydney School of Public Health, University of Sydney, Sydney, Australia
| | - Hui-Kim Yap
- Department of Pediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Jaap Groothoff
- Department of Pediatric Nephrology, Emma Children's Hospital, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Michael Zappitelli
- Department of Pediatrics, Division of Nephrology, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Noa Amir
- Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, Australia; Sydney School of Public Health, University of Sydney, Sydney, Australia
| | - Stephen I Alexander
- Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, Australia
| | - Susan L Furth
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Susan Samuel
- Department of Pediatrics, Section of Nephrology, University of Calgary, Calgary, Alberta, Canada
| | - Talia Gutman
- Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, Australia; Sydney School of Public Health, University of Sydney, Sydney, Australia
| | - Jonathan C Craig
- College of Medicine and Public Health, Flinders University, Adelaide, Australia
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Boynton SA, Matheson MB, Ng DK, Hidalgo G, Warady BA, Furth SL, Atkinson MA. The Relationship Between Neighborhood Disadvantage and Kidney Disease Progression in the Chronic Kidney Disease in Children (CKiD) Cohort. Am J Kidney Dis 2022; 80:207-214. [PMID: 35085688 PMCID: PMC9309183 DOI: 10.1053/j.ajkd.2021.12.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 12/03/2021] [Indexed: 01/27/2023]
Abstract
RATIONALE & OBJECTIVE To examine the relationship between neighborhood poverty and deprivation, chronic kidney disease (CKD) comorbidities, and disease progression in children with CKD. STUDY DESIGN Observational cohort study. SETTING & PARTICIPANTS Children with mild to moderate CKD enrolled in the CKiD (Chronic Kidney Disease in Children) study with available US Census data. EXPOSURE Neighborhood poverty and neighborhood disadvantage. OUTCOME Binary outcomes of short stature, obesity, hypertension, and health care utilization for cross-sectional analysis; a CKD progression end point (incident kidney replacement therapy [KRT] or 50% loss in estimated glomerular filtration rate), and mode of first KRT for time-to-event analysis. ANALYTICAL APPROACH Cross-sectional analysis of health characteristics at time of first Census data collection using logistic regression to estimate odds ratios. Risk for CKD progression was analyzed using a Cox proportional hazard model. Multivariable models were adjusted for race, ethnicity, sex, and family income. RESULTS There was strong agreement between family and neighborhood socioeconomic characteristics. Risk for short stature, hospitalization, and emergency department (ED) use were significantly associated with lower neighborhood income. After controlling for race, ethnicity, sex, and family income, the odds of hospitalization (OR, 1.71 [95% CI, 1.08-2.71]) and ED use (OR, 1.56 [95% CI, 1.02-2.40]) remained higher for those with lower neighborhood income. The hazard ratio of reaching the CKD progression outcome for participants living in lower income neighborhoods was significantly increased in the unadjusted model only (1.38 [95% CI, 1.02-1.87]). Likelihood of undergoing a preemptive transplant was decreased with lower neighborhood income (OR, 0.47 [95% CI, 0.24-0.96]) and higher neighborhood deprivation (OR, 0.31 [95% CI, 0.10-0.97]), but these associations did not persist after controlling for participant characteristics. LIMITATIONS Limited generalizability, as only those with consistent longitudinal nephrology care were studied. CONCLUSIONS Neighborhood-level socioeconomic status (SES) was associated with poorer health characteristics and CKD progression in univariable analysis. However, the relationships were attenuated after accounting for participant-level factors including race. A persistent association of neighborhood poverty with hospitalizations and ED suggests an independent effect of SES on health care utilization, the causes for which deserve additional study.
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Affiliation(s)
- Sara A. Boynton
- Senior Research Program Supervisor, Division of Pediatric Nephrology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Matthew B. Matheson
- Senior Biostatistician, Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Derek K. Ng
- Assistant Professor, Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD
| | - Guillermo Hidalgo
- Professor, Division of Pediatric Nephrology, Hackensack Meridian Health School of Medicine, Neptune, NJ
| | - Bradley A. Warady
- Professor, Division of Pediatric Nephrology, Children’s Mercy Kansas City, Kansas City, MO
| | - Susan L. Furth
- Professor, Division of Nephrology, Children’s Hospital of Philadelphia, Philadelphia, PA; Department of Biostatistics and Epidemiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Meredith A. Atkinson
- Associate Professor, Division of Pediatric Nephrology, Johns Hopkins University School of Medicine, Baltimore, MD
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Ng DK, Furth SL, Warady BA, Crews DC, Seegmiller JC, Schwartz GJ. Self-reported Race, Serum Creatinine, Cystatin C, and GFR in Children and Young Adults With Pediatric Kidney Diseases: A Report From the Chronic Kidney Disease in Children (CKiD) Study. Am J Kidney Dis 2022; 80:174-185.e1. [PMID: 34974031 PMCID: PMC9243196 DOI: 10.1053/j.ajkd.2021.10.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 10/24/2021] [Indexed: 01/27/2023]
Abstract
RATIONALE & OBJECTIVE Recent reassessment of the use of race in estimated glomerular filtration rate (eGFR) in adults has instigated questions about the role of race in eGFR expressions for children. Little research has examined the associations of self-reported race with measured GFR (mGFR) adjusting for serum creatinine or cystatin C in children and young adults with chronic kidney disease (CKD). This study examined these associations and evaluated the performance of the previously published "U25" (under the age of 25 years) eGFR equations in a large cohort of children and young adults with CKD. STUDY DESIGN Observational cohort study. SETTING & PARTICIPANTS Participants in the Chronic Kidney Disease in Children (CKiD) study including 190 Black and 675 non-Black participants contributing 473 and 1,897 annual person-visits, respectively. EXPOSURE Self- or parental-reported race (Black, non-Black). Adjustment for serum creatinine or cystatin C, body size, and socioeconomic status. OUTCOME mGFR based on iohexol clearance. ANALYTICAL APPROACH Linear regression with generalized estimating equations, stratified by age (<6, 6-12, 12-18, and ≥18 years) incorporating serum creatinine or serum cystatin C. Contrasting performance in different self-reported racial groups of the U25 eGFR equations. RESULTS Self-reported Black race was significantly associated with 12.8% higher mGFR among children in regression models including serum creatinine. Self-reported Black race was significantly associated with 3.5% lower mGFR after adjustment for cystatin C overall but was not significant for those over 12 years. The results were similar after adjustment for body size and socioeconomic factors. The average of creatinine- and cystatin C-based U25 equations was unbiased by self-reported race groups. LIMITATIONS Small number of children < 6 years; lean body mass was estimated. CONCLUSIONS Differences in the creatinine-mGFR relationship by self-reported race were observed in children and young adults with CKD and were consistent with findings in adults. Smaller and opposite differences were observed for the cystatin C-mGFR relationship, especially in the younger age group. We recommend inclusion of children for future investigations of biomarkers to estimate GFR. Importantly, for GFR estimation among those under 25 years of age, the average of the new U25 creatinine and cystatin C equations without race coefficients yields unbiased estimates of mGFR.
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Affiliation(s)
- Derek K. Ng
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Susan L. Furth
- Children’s Hospital of Philadelphia, Philadelphia, PA, USA,Department of Pediatrics, Division of Nephrology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Bradley A. Warady
- Division of Pediatric Nephrology, Children’s Mercy Kansas City, Kansas City, MO, USA
| | - Deidra C. Crews
- Division of Nephrology, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Jesse C. Seegmiller
- Department of Laboratory Medicine and Pathology, School of Medicine, University of Minnesota, Minneapolis, MN
| | - George J. Schwartz
- Department of Pediatrics, University of Rochester Medical Center, Rochester, NY, USA
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Shah LN, Matheson MB, Furth SL, Schwartz GJ, Warady BA, Wong CJ. Low variability of plant protein intake in the CKiD cohort does not demonstrate changes in estimated GFR nor electrolyte balance. Pediatr Nephrol 2022; 37:1647-1655. [PMID: 34796391 PMCID: PMC9114168 DOI: 10.1007/s00467-021-05334-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/12/2021] [Accepted: 10/12/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Vegetable or plant-based sources of protein may confer health benefits in children with progressive kidney disease. Our aims were to understand the effect of the proportion of vegetable protein intake on changes in estimated GFR and to understand the effect of the proportion of vegetable protein intake on serum levels of bicarbonate, phosphorus, and potassium. METHODS Children with baseline eGFR between 30 and 90 mL/min/1.73 m2 were recruited from 59 centers across North America as part of the chronic kidney disease in children (CKiD) study. The percentage of dietary vegetable protein (VP%) was gathered from annual Food Frequency Questionnaires. We performed longitudinal linear mixed models to determine the effect of VP% on eGFR and longitudinal logistic mixed models to determine the effect of VP% on electrolyte balance (potassium, phosphorus, bicarbonate). RESULTS Two thousand visits from 631 subjects. Across all dichotomized groups of children (sex, African American race, Hispanic ethnicity, glomerular etiology of CKD, hypertension, anemia, hyperkalemia, hyperphosphatemia, acidosis, BMI < 95th percentile), the median VP% was 32-35%. The longitudinal mixed model analysis did not show any effect of VP% on eGFR electrolyte (bicarbonate, phosphorus, and potassium) abnormalities (p > 0.1). CONCLUSIONS A diverse cohort of children with CKD has a narrow and homogeneous intake of vegetable protein. Due to the low variability of plant-based protein in the cohort, there were no associations between the percentage of plant protein intake and changes in eGFR nor electrolyte balance. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Lokesh N. Shah
- Stanford University School of Medicine, Stanford, CA, USA, Lucile Salter Packard Children’s Hospital at Stanford, Palo Alto, CA, USA
| | - Matthew B. Matheson
- Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA
| | - Susan L. Furth
- The Children’s Hospital of Philadelphia, Philadelphia, PA, USA, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | | | - Bradley A. Warady
- University of Missouri Kansas City School of Medicine, Kansas City, MO, USA, Children’s Mercy Hospitals and Clinics, Kansas City, MO, USA
| | - Cynthia J. Wong
- Stanford University School of Medicine, Stanford, CA, USA, Lucile Salter Packard Children’s Hospital at Stanford, Palo Alto, CA, USA
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Yu PK, Radcliffe J, Gerry Taylor H, Amin RS, Baldassari CM, Boswick T, Chervin RD, Elden LM, Furth SL, Garetz SL, George A, Ishman SL, Kirkham EM, Liu C, Mitchell RB, Kamal Naqvi S, Rosen CL, Ross KR, Shah JR, Tapia IE, Young LR, Zopf DA, Wang R, Redline S. Neurobehavioral morbidity of pediatric mild sleep-disordered breathing and obstructive sleep apnea. Sleep 2022; 45:zsac035. [PMID: 35554583 PMCID: PMC9113015 DOI: 10.1093/sleep/zsac035] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 12/20/2021] [Indexed: 11/13/2022] Open
Abstract
STUDY OBJECTIVES Obstructive sleep apnea is associated with neurobehavioral dysfunction, but the relationship between disease severity as measured by the apnea-hypopnea index and neurobehavioral morbidity is unclear. The objective of our study is to compare the neurobehavioral morbidity of mild sleep-disordered breathing versus obstructive sleep apnea. METHODS Children 3-12 years old recruited for mild sleep-disordered breathing (snoring with obstructive apnea-hypopnea index < 3) into the Pediatric Adenotonsillectomy Trial for Snoring were compared to children 5-9 years old recruited for obstructive sleep apnea (obstructive apnea-hypopnea 2-30) into the Childhood Adenotonsillectomy Trial. Baseline demographic, polysomnographic, and neurobehavioral outcomes were compared using univariable and multivariable analysis. RESULTS The sample included 453 participants with obstructive sleep apnea (median obstructive apnea-hypopnea index 5.7) and 459 participants with mild sleep-disordered breathing (median obstructive apnea-hypopnea index 0.5). By polysomnography, participants with obstructive sleep apnea had poorer sleep efficiency and more arousals. Children with mild sleep-disordered breathing had more abnormal executive function scores (adjusted odds ratio 1.96, 95% CI 1.30-2.94) compared to children with obstructive sleep apnea. There were also elevated Conners scores for inattention (adjusted odds ratio 3.16, CI 1.98-5.02) and hyperactivity (adjusted odds ratio 2.82, CI 1.83-4.34) in children recruited for mild sleep-disordered breathing. CONCLUSIONS Abnormal executive function, inattention, and hyperactivity were more common in symptomatic children recruited into a trial for mild sleep-disordered breathing compared to children recruited into a trial for obstructive sleep apnea. Young, snoring children with only minimally elevated apnea-hypopnea levels may still be at risk for deficits in executive function and attention. TRIAL REGISTRATION Pediatric Adenotonsillectomy for Snoring (PATS), NCT02562040; Childhood Adenotonsillectomy Trial (CHAT), NCT00560859.
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Affiliation(s)
- Phoebe K Yu
- Brigham and Women’s Hospital, Division of Sleep and Circadian Disorders, Boston, MA, USA
- Massachusetts Eye and Ear Infirmary, Department of Otolaryngology, Boston, MA, USA
| | - Jerilynn Radcliffe
- Division of Developmental and Behavioral Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - H Gerry Taylor
- Case Western Reserve University School of Medicine, Department of Pediatrics, Cleveland, OH, USA
| | - Raouf S Amin
- Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, Cincinnati, OH, USA
| | - Cristina M Baldassari
- Eastern Virginia Medical School, Department of Otolaryngology Head and Neck Surgery, Children’s Hospitals of The King’s Daughters Department of Pediatric Sleep Medicine, Norfolk, VA, USA
| | - Thomas Boswick
- Eastern Virginia Medical School, Department of Otolaryngology Head and Neck Surgery, Children’s Hospitals of The King’s Daughters Department of Pediatric Sleep Medicine, Norfolk, VA, USA
| | - Ronald D Chervin
- University of Michigan, Department of Neurology, Ann Arbor, MI, USA
| | - Lisa M Elden
- Children’s Hospital of Philadelphia, Division of Otolaryngology, Philadelphia, PA, USA
| | - Susan L Furth
- Children’s Hospital of Philadelphia, Department of Pediatrics, Division of Pulmonary and Sleep Medicine, Philadelphia, PA, USA
| | - Susan L Garetz
- University of Michigan, Department of Otolaryngology – Head and Neck Surgery, Ann Arbor, MI, USA
| | - Alisha George
- Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, Cincinnati, OH, USA
| | - Stacey L Ishman
- University of Cincinnati College of Medicine, Department of Otolaryngology – Head and Neck Surgery, Cincinnati, OH, USA
- Cincinnati Children’s Hospital Medical Center, Division of Otolaryngology – Head & Neck Surgery, Cincinnati, OH, USA
| | - Erin M Kirkham
- University of Michigan, Department of Otolaryngology – Head and Neck Surgery, Ann Arbor, MI, USA
| | - Christopher Liu
- University of Texas Southwestern, Department of Otolaryngology, Dallas, TX, USA
| | - Ron B Mitchell
- University of Texas Southwestern, Department of Otolaryngology, Dallas, TX, USA
- University of Texas Southwestern, Department of Pediatrics, Dallas, TX, USA
| | - S Kamal Naqvi
- University of Texas Southwestern, Department of Pediatrics, Dallas, TX, USA
| | - Carol L Rosen
- Case Western Reserve University School of Medicine, Department of Pediatrics, Cleveland, OH, USA
| | - Kristie R Ross
- University Hospitals Rainbow Babies & Children’s Hospital, Department of Pediatrics, Cleveland, OH, USA
| | - Jay R Shah
- University Hospitals Rainbow Babies & Children’s Hospital, Department of Otolaryngology, Cleveland, OH, USA
| | - Ignacio E Tapia
- Children’s Hospital of Philadelphia, Department of Pediatrics, Division of Pulmonary and Sleep Medicine, Philadelphia, PA, USA
| | - Lisa R Young
- Children’s Hospital of Philadelphia, Department of Pediatrics, Division of Pulmonary and Sleep Medicine, Philadelphia, PA, USA
| | - David A Zopf
- University of Michigan, Department of Otolaryngology – Head and Neck Surgery, Ann Arbor, MI, USA
| | - Rui Wang
- Brigham and Women’s Hospital, Division of Sleep and Circadian Disorders, Boston, MA, USA
| | - Susan Redline
- Brigham and Women’s Hospital, Division of Sleep and Circadian Disorders, Boston, MA, USA
- Harvard T.H. Chan School of Public Health, Department of Epidemiology, Boston, MA, USA
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Molino AR, Minnick MLG, Jerry-Fluker J, Karita Muiru J, Boynton SA, Furth SL, Warady BA, Ng DK. Health and Dental Insurance and Health Care Utilization Among Children, Adolescents, and Young Adults With CKD: Findings From the CKiD Cohort Study. Kidney Med 2022; 4:100455. [PMID: 35518833 PMCID: PMC9062328 DOI: 10.1016/j.xkme.2022.100455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Rationale & Objective To understand the association between health and dental insurance status and health and dental care utilization, and their relationship with disease severity in a population with childhood-onset chronic kidney disease (CKD). Study Design Observational cohort study. Settings & Participants Nine hundred fifty-three participants contributing 4,369 person-visits (unit of analysis) in the United States enrolled in the Chronic Kidney Disease in Children (CKiD) Study from 2005 to 2019. Exposures Health insurance (private vs public vs none) and dental insurance (presence vs absence) self-reported at annual visits. Outcomes Self-reported suboptimal health care utilization in the past year, defined separately as not visiting a private physician, visiting the emergency room, visiting the emergency room at least twice, being hospitalized, and self-reported suboptimal dental care utilization over the past year, defined as not receiving dental care. Analytical Approach Repeated measures Poisson regression models were fit to estimate and compare utilization by insurance type and disease severity at the prior visit. Additional unadjusted and adjusted models were fit, as well as models including interactions between insurance and Black race, maternal education, and income. Results Those with public health insurance were more likely to report suboptimal health care utilization across the CKD severity spectrum, and lack of dental insurance was strongly associated with lack of dental care. These relationships varied depending on strata of socioeconomic status and race but the effect measure modification was not significant. Limitations Details of insurance coverage were unavailable; reasons for emergency care or type of private physician visited were unknown. Conclusions Pediatric nephrology programs may consider interventions to help direct supportive resources to families with public insurance who are at higher risk for suboptimal utilization of care. Insurance providers should identify areas to expand access for families of children with CKD.
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Affiliation(s)
- Andrea R. Molino
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Maria Lourdes G. Minnick
- Department of Pediatrics, Division of Nephrology, The Children’s Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Judith Jerry-Fluker
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Jacqueline Karita Muiru
- Department of Pediatrics, Division of Nephrology, The Children’s Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Sara A. Boynton
- Department of Pediatrics, Division of Nephrology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Susan L. Furth
- Department of Pediatrics, Division of Nephrology, The Children’s Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Bradley A. Warady
- Department of Pediatrics, Division of Nephrology, Children’s Mercy Kansas City, Kansas City, MO
| | - Derek K. Ng
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Chronic Kidney Disease in Children Study
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
- Department of Pediatrics, Division of Nephrology, The Children’s Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
- Department of Pediatrics, Division of Nephrology, Johns Hopkins University School of Medicine, Baltimore, MD
- Department of Pediatrics, Division of Nephrology, Children’s Mercy Kansas City, Kansas City, MO
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42
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Brown DD, Carroll M, Ng DK, Levy RV, Greenbaum LA, Kaskel FJ, Furth SL, Warady BA, Melamed ML, Dauber A. Longitudinal Associations between Low Serum Bicarbonate and Linear Growth in Children with CKD. Kidney360 2022; 3:666-676. [PMID: 35721607 PMCID: PMC9136912 DOI: 10.34067/kid.0005402021] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 01/10/2022] [Indexed: 01/28/2023]
Abstract
Background Poor linear growth is a consequence of chronic kidney disease (CKD) that has been linked to adverse outcomes. Metabolic acidosis (MA) has been identified as a risk factor for growth failure. We investigated the longitudinal relationship between MA and linear growth in children with CKD and examined whether treatment of MA modified linear growth. Methods To describe longitudinal associations between MA and linear growth, we used serum bicarbonate levels, height measurements, and standard deviation (z scores) of children enrolled in the prospective cohort study Chronic Kidney Disease in Children. Analyses were adjusted for covariates recognized as correlating with poor growth, including demographic characteristics, glomerular filtration rate (GFR), proteinuria, calcium, phosphate, parathyroid hormone, and CKD duration. CKD diagnoses were analyzed by disease categories, nonglomerular or glomerular. Results The study population included 1082 children with CKD: 808 with nonglomerular etiologies and 274 with glomerular etiologies. Baseline serum bicarbonate levels ≤22 mEq/L were associated with worse height z scores in all children. Longitudinally, serum bicarbonate levels ≤18 and 19-22 mEq/L were associated with worse height z scores in children with nonglomerular CKD causes, with adjusted mean values of -0.39 (95% CI, -0.58 to -0.2) and -0.17 (95% CI, -0.28 to -0.05), respectively. Children with nonglomerular disease and more severe GFR impairment had a higher risk for worse height z score. A significant association was not found in children with glomerular diseases. We also investigated the potential effect of treatment of MA on height in children with a history of alkali therapy use, finding that only persistent users had a significant positive association between their height z score and higher serum bicarbonate levels. Conclusions We observed a longitudinal association between MA and lower height z score. Additionally, persistent alkali therapy use was associated with better height z scores. Future clinical trials of alkali therapy need to evaluate this relationship prospectively.
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Affiliation(s)
- Denver D. Brown
- Division of Nephrology, Children’s National Hospital, Washington, DC
| | - Megan Carroll
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Derek K. Ng
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Rebecca V. Levy
- Division of Pediatric Nephrology, University of Rochester Medical Center, Rochester, New York
| | - Larry A. Greenbaum
- Division of Pediatric Nephrology, Emory University School of Medicine and Children’s Healthcare of Atlanta, Atlanta, Georgia
| | - Frederick J. Kaskel
- Division of Pediatric Nephrology, The Children’s Hospital at Montefiore, Bronx, New York
| | - Susan L. Furth
- Division of Pediatric Nephrology, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Bradley A. Warady
- Division of Pediatric Nephrology, Children’s Mercy Hospital, Kansas City, Missouri
| | - Michal L. Melamed
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York
| | - Andrew Dauber
- Division of Endocrinology, Children’s National Hospital, Washington, DC
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43
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Hooper SR, Johnson RJ, Gerson AC, Lande MB, Shinnar S, Harshman LA, Kogon AJ, Matheson M, Bartosh S, Carlson J, Warady BA, Furth SL. Overview of the findings and advances in the neurocognitive and psychosocial functioning of mild to moderate pediatric CKD: perspectives from the Chronic Kidney Disease in Children (CKiD) cohort study. Pediatr Nephrol 2022; 37:765-775. [PMID: 34110493 PMCID: PMC8660930 DOI: 10.1007/s00467-021-05158-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 05/13/2021] [Accepted: 05/24/2021] [Indexed: 11/29/2022]
Abstract
The Chronic Kidney Disease in Children (CKiD) prospective cohort study was designed to address the neurocognitive, growth, cardiovascular, and disease progression of children and adolescents with mild to moderate CKD. The study has had continuous funding from NIDDK for 17 years and has contributed significant advances in pediatric CKD. The goals of this educational review are threefold: (1) to provide an overview of the neurocognitive and psychosocial studies from CKiD to date; (2) to provide best practice recommendations for those working with the neurocognitive and psychosocial aspects of pediatric CKD based on CKiD findings; and (3) to help chart future goals and directives for both research and clinical practice. This collection of 22 empirical studies has produced a number of key findings for children and adolescents with mild to moderate CKD. While various studies suggest a relatively positive presentation for this population as a whole, without evidence of significant impairment or deterioration, findings do indicate the presence of neurocognitive dysfunction, emotional-behavioral difficulties, and lower quality of life for many children with CKD. These findings support the promotion of best practices that are accompanied by additional future clinical and research initiatives with this patient population.
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Affiliation(s)
- Stephen R Hooper
- Department of Allied Health Sciences, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, USA.
| | - Rebecca J Johnson
- Division of Developmental and Behavioral Health, Department of Pediatrics, Children's Mercy Kansas City, UMKC School of Medicine, Kansas City, MO, USA
| | - Arlene C Gerson
- Department of Pediatrics, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Marc B Lande
- Department of Pediatrics, University of Rochester Medical Center, Rochester, NY, USA
| | - Shlomo Shinnar
- Departments of Neurology, Pediatrics and Epidemiology and Population Health, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Lyndsay A Harshman
- Division of Pediatric Nephrology, University of Iowa Stead Family Department of Pediatrics, University of Iowa, Iowa City, IA, USA
| | - Amy J Kogon
- Children's Hospital of Philadelphia, Division of Pediatric Nephrology, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Matthew Matheson
- Department of Epidemiology, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Sharon Bartosh
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Joann Carlson
- Division of Pediatric Nephrology and Hypertension, Department of Pediatrics, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Bradley A Warady
- Division of Pediatric Nephrology, Department of Pediatrics, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Susan L Furth
- Children's Hospital of Philadelphia, Division of Pediatric Nephrology, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
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44
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Lee AM, Hu J, Xu Y, Abraham AG, Xiao R, Coresh J, Rebholz C, Chen J, Rhee EP, Feldman HI, Ramachandran VS, Kimmel PL, Warady BA, Furth SL, Denburg MR. Using Machine Learning to Identify Metabolomic Signatures of Pediatric Chronic Kidney Disease Etiology. J Am Soc Nephrol 2022; 33:375-386. [PMID: 35017168 PMCID: PMC8819986 DOI: 10.1681/asn.2021040538] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 11/13/2021] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Untargeted plasma metabolomic profiling combined with machine learning (ML) may lead to discovery of metabolic profiles that inform our understanding of pediatric CKD causes. We sought to identify metabolomic signatures in pediatric CKD based on diagnosis: FSGS, obstructive uropathy (OU), aplasia/dysplasia/hypoplasia (A/D/H), and reflux nephropathy (RN). METHODS Untargeted metabolomic quantification (GC-MS/LC-MS, Metabolon) was performed on plasma from 702 Chronic Kidney Disease in Children study participants (n: FSGS=63, OU=122, A/D/H=109, and RN=86). Lasso regression was used for feature selection, adjusting for clinical covariates. Four methods were then applied to stratify significance: logistic regression, support vector machine, random forest, and extreme gradient boosting. ML training was performed on 80% total cohort subsets and validated on 20% holdout subsets. Important features were selected based on being significant in at least two of the four modeling approaches. We additionally performed pathway enrichment analysis to identify metabolic subpathways associated with CKD cause. RESULTS ML models were evaluated on holdout subsets with receiver-operator and precision-recall area-under-the-curve, F1 score, and Matthews correlation coefficient. ML models outperformed no-skill prediction. Metabolomic profiles were identified based on cause. FSGS was associated with the sphingomyelin-ceramide axis. FSGS was also associated with individual plasmalogen metabolites and the subpathway. OU was associated with gut microbiome-derived histidine metabolites. CONCLUSION ML models identified metabolomic signatures based on CKD cause. Using ML techniques in conjunction with traditional biostatistics, we demonstrated that sphingomyelin-ceramide and plasmalogen dysmetabolism are associated with FSGS and that gut microbiome-derived histidine metabolites are associated with OU.
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Affiliation(s)
- Arthur M. Lee
- Division of Nephrology, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Jian Hu
- Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Yunwen Xu
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore Maryland
| | - Alison G. Abraham
- School of Public Health, University of Colorado Denver, Denver, Colorado
| | - Rui Xiao
- Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Josef Coresh
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore Maryland
| | - Casey Rebholz
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore Maryland
| | - Jingsha Chen
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore Maryland
| | - Eugene P. Rhee
- Department of Medicine, Massachusetts General Hospital, Harvard University, Boston, Massachusetts
| | - Harold I. Feldman
- Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Vasan S. Ramachandran
- Department of Medicine, Boston University School of Medicine, Boston University School of Public Health, Boston University Center for Computing and Data Science, Boston, Massachusetts
| | - Paul L. Kimmel
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
| | - Bradley A. Warady
- Department of Pediatrics, Children’s Mercy Hospital, University of Missouri-Kansas City School of Medicine, Kansas City, Missouri
| | - Susan L. Furth
- Division of Nephrology, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania,Department of Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
| | - Michelle R. Denburg
- Division of Nephrology, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania,Department of Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
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45
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Hooper SR, Johnson RJ, Lande M, Matheson M, Shinnar S, Kogon AJ, Harshman L, Spinale J, Gerson AC, Warady BA, Furth SL. The Similarities and Differences Between Glomerular vs. Non-glomerular Diagnoses on Intelligence and Executive Functions in Pediatric Chronic Kidney Disease: A Brief Report. Front Neurol 2022; 12:787602. [PMID: 34987470 PMCID: PMC8720880 DOI: 10.3389/fneur.2021.787602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 11/30/2021] [Indexed: 11/27/2022] Open
Abstract
Pediatric chronic kidney disease (CKD) appears to be a heterogeneous group of conditions, but this heterogeneity has not been explored with respect to its impact on neurocognitive functioning. This study investigated the neurocognitive functioning of those with glomerular (G) vs. non-glomerular (NG) diagnoses. Data from the North American CKiD Study were employed and the current study included 1,003 children and adolescents with mild to moderate CKD. The G Group included 260 participants (median age = 14.7 years) and the NG Group included 743 individuals (median age = 9.0 years). Neurocognitive measures assessed IQ, inhibitory control, attention regulation, problem solving, working memory, and overall executive functioning. Data from all visits were included in the linear mixed model analyses. After adjusting for sociodemographic and CKD-related covariates, results indicated no differences between the diagnostic groups on measures of IQ, problem solving, working memory, and attention regulation. There was a trend for the G group to receive better parent ratings on their overall executive functions (p < 0.07), with a small effect size being present. Additionally, there was a significant G group X hypertension interaction (p < 0.003) for inhibitory control, indicating that those with both a G diagnosis and hypertension performed more poorly than the NG group with hypertension. These findings suggest that the separation of G vs. NG CKD produced minimal, but specific group differences were observed. Ongoing examination of the heterogeneity of pediatric CKD on neurocognition, perhaps at a different time point in disease progression or using a different model, appears warranted.
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Affiliation(s)
- Stephen R Hooper
- Department of Allied Health Sciences, School of Medicine, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States
| | - Rebecca J Johnson
- Department of Pediatrics, Children's Mercy Kansas City, School of Medicine, University of Missouri-Kansas City, Kansas City, MO, United States
| | - Marc Lande
- Department of Pediatrics, University of Rochester Medical Center, Rochester, NY, United States
| | - Matthew Matheson
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD, United States
| | - Shlomo Shinnar
- Department of Neurology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Amy J Kogon
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, United States
| | - Lyndsay Harshman
- Department of Pediatrics, University of Iowa Stead Family Children's Hospital, Iowa City, IA, United States
| | - Joann Spinale
- Department of Pediatrics, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, United States
| | - Arlene C Gerson
- Department of Pediatrics, Johns Hopkins Medical School, Baltimore, MD, United States
| | - Bradley A Warady
- Department of Pediatrics, Children's Mercy Kansas City, School of Medicine, University of Missouri-Kansas City, Kansas City, MO, United States
| | - Susan L Furth
- Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, United States
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Bakhoum CY, Katz R, Samuels JA, Al-Rousan T, Furth SL, Ix JH, Garimella PS. Nocturnal Dipping and Left Ventricular Mass Index in the Chronic Kidney Disease in Children Cohort. Clin J Am Soc Nephrol 2022; 17:75-82. [PMID: 34772729 PMCID: PMC8763165 DOI: 10.2215/cjn.09810721] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 11/01/2021] [Indexed: 01/03/2023]
Abstract
BACKGROUND AND OBJECTIVES The physiologic nocturnal BP decline is often blunted in patients with CKD; however, the consequences of BP nondipping in children are largely unknown. Our objective was to determine risk factors for nondipping and to investigate if nondipping is associated with higher left ventricular mass index in children with CKD. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS We conducted a cross-sectional analysis of ambulatory BP monitoring and echocardiographic data in participants of the Chronic Kidney Disease in Children study. Multivariable linear and spline regression analyses were used to evaluate the relationship of risk factors with dipping and of dipping with left ventricular mass index. RESULTS Within 552 participants, mean age was 11 (±4) years, mean eGFR was 53 (±20) ml/min per 1.73 m2, and 41% were classified as nondippers. In participants with nonglomerular CKD, female sex and higher sodium intake were significantly associated with less systolic and diastolic dipping (P≤0.05). In those with glomerular CKD, Black race and greater proteinuria were significantly associated with less systolic and diastolic dipping (P≤0.05). Systolic dipping and diastolic dipping were not significantly associated with left ventricular mass index; however, in spline regression plots, diastolic dipping appeared to have a nonlinear relationship with left ventricular mass index. As compared with diastolic dipping of 20%-25%, dipping of <20% was associated with 1.41-g/m2.7-higher left ventricular mass index (95% confidence interval, -0.47 to 3.29), and dipping of >25% was associated with 1.98-g/m2.7-higher left ventricular mass index (95% confidence interval, -0.77 to 4.73), although these relationships did not achieve statistical significance. CONCLUSIONS Black race, female sex, and greater proteinuria and sodium intake were significantly associated with blunted dipping in children with CKD. We did not find a statistically significant association between dipping and left ventricular mass index. PODCAST This article contains a podcast at https://www.asn-online.org/media/podcast/CJASN/2021_12_20_CJN09810721.mp3.
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Affiliation(s)
- Christine Y. Bakhoum
- Department of Pediatrics, Section of Pediatric Nephrology, Yale University, New Haven, Connecticut
| | - Ronit Katz
- Department of Obstetrics and Gynecology, University of Washington, Seattle, Washington
| | - Joshua A. Samuels
- Division of Pediatric Nephrology & Hypertension, McGovern Medical School at the University of Texas Health Science Center, Houston, Texas
| | - Tala Al-Rousan
- Division of Global Public Health, Department of Medicine, University of California San Diego, La Jolla, California
| | - Susan L. Furth
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania,Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Joachim H. Ix
- Division of Nephrology and Hypertension, Department of Medicine, University of California San Diego, La Jolla, California,Nephrology Section, Medicine Service, Veterans Affairs San Diego Healthcare System, La Jolla, California,Kidney Research Innovation Hub of San Diego, La Jolla, California
| | - Pranav S. Garimella
- Division of Nephrology and Hypertension, Department of Medicine, University of California San Diego, La Jolla, California,Kidney Research Innovation Hub of San Diego, La Jolla, California
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47
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Wenderfer SE, Chang JC, Goodwin Davies A, Luna IY, Scobell R, Sears C, Magella B, Mitsnefes M, Stotter BR, Dharnidharka VR, Nowicki KD, Dixon BP, Kelton M, Flynn JT, Gluck C, Kallash M, Smoyer WE, Knight A, Sule S, Razzaghi H, Bailey LC, Furth SL, Forrest CB, Denburg MR, Atkinson MA. Using a Multi-Institutional Pediatric Learning Health System to Identify Systemic Lupus Erythematosus and Lupus Nephritis: Development and Validation of Computable Phenotypes. Clin J Am Soc Nephrol 2022; 17:65-74. [PMID: 34732529 PMCID: PMC8763148 DOI: 10.2215/cjn.07810621] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 10/13/2021] [Indexed: 01/03/2023]
Abstract
BACKGROUND AND OBJECTIVES Performing adequately powered clinical trials in pediatric diseases, such as SLE, is challenging. Improved recruitment strategies are needed for identifying patients. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS Electronic health record algorithms were developed and tested to identify children with SLE both with and without lupus nephritis. We used single-center electronic health record data to develop computable phenotypes composed of diagnosis, medication, procedure, and utilization codes. These were evaluated iteratively against a manually assembled database of patients with SLE. The highest-performing phenotypes were then evaluated across institutions in PEDSnet, a national health care systems network of >6.7 million children. Reviewers blinded to case status used standardized forms to review random samples of cases (n=350) and noncases (n=350). RESULTS Final algorithms consisted of both utilization and diagnostic criteria. For both, utilization criteria included two or more in-person visits with nephrology or rheumatology and ≥60 days follow-up. SLE diagnostic criteria included absence of neonatal lupus, one or more hydroxychloroquine exposures, and either three or more qualifying diagnosis codes separated by ≥30 days or one or more diagnosis codes and one or more kidney biopsy procedure codes. Sensitivity was 100% (95% confidence interval [95% CI], 99 to 100), specificity was 92% (95% CI, 88 to 94), positive predictive value was 91% (95% CI, 87 to 94), and negative predictive value was 100% (95% CI, 99 to 100). Lupus nephritis diagnostic criteria included either three or more qualifying lupus nephritis diagnosis codes (or SLE codes on the same day as glomerular/kidney codes) separated by ≥30 days or one or more SLE diagnosis codes and one or more kidney biopsy procedure codes. Sensitivity was 90% (95% CI, 85 to 94), specificity was 93% (95% CI, 89 to 97), positive predictive value was 94% (95% CI, 89 to 97), and negative predictive value was 90% (95% CI, 84 to 94). Algorithms identified 1508 children with SLE at PEDSnet institutions (537 with lupus nephritis), 809 of whom were seen in the past 12 months. CONCLUSIONS Electronic health record-based algorithms for SLE and lupus nephritis demonstrated excellent classification accuracy across PEDSnet institutions.
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Affiliation(s)
- Scott E. Wenderfer
- Pediatric Nephrology, Baylor College of Medicine, Texas Children’s Hospital, Houston, Texas
| | - Joyce C. Chang
- Pediatric Rheumatology, Perelman School of Medicine at the University of Pennsylvania, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Amy Goodwin Davies
- Applied Clinical Research Center, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Ingrid Y. Luna
- Applied Clinical Research Center, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Rebecca Scobell
- Pediatric Nephrology, Baylor College of Medicine, Texas Children’s Hospital, Houston, Texas,Applied Clinical Research Center, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Cora Sears
- Pediatric Rheumatology, Perelman School of Medicine at the University of Pennsylvania, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Bliss Magella
- Pediatric Nephrology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
| | - Mark Mitsnefes
- Pediatric Nephrology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio,Pediatrics, University of Cincinnati, Cincinnati, Ohio
| | - Brian R. Stotter
- Pediatric Nephrology, Hypertension and Pheresis, St. Louis Children’s Hospital, Washington University in St. Louis, St. Louis, Missouri
| | - Vikas R. Dharnidharka
- Pediatric Nephrology, Hypertension and Pheresis, St. Louis Children’s Hospital, Washington University in St. Louis, St. Louis, Missouri
| | - Katherine D. Nowicki
- Pediatric Rheumatology, University of Colorado School of Medicine, Aurora, Colorado
| | - Bradley P. Dixon
- Pediatric Nephrology, University of Colorado School of Medicine, Aurora, Colorado
| | - Megan Kelton
- Pediatrics, University of Washington, Seattle, Washington,Nephrology, Seattle Children’s Hospital, Seattle, Washington
| | - Joseph T. Flynn
- Pediatrics, University of Washington, Seattle, Washington,Nephrology, Seattle Children’s Hospital, Seattle, Washington
| | - Caroline Gluck
- Pediatric Nephrology, Nemours/Alfred I. DuPont Hospital for Children, Wilmington, Delaware
| | - Mahmoud Kallash
- Center for Clinical and Translational Research, Nationwide Children’s Hospital, Columbus, Ohio,Department of Pediatrics, Nationwide Children’s Hospital, The Ohio State University, Columbus, Ohio
| | - William E. Smoyer
- Center for Clinical and Translational Research, Nationwide Children’s Hospital, Columbus, Ohio,Department of Pediatrics, Nationwide Children’s Hospital, The Ohio State University, Columbus, Ohio
| | - Andrea Knight
- Pediatric Rheumatology, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Sangeeta Sule
- Pediatric Rheumatology, George Washington University, Children’s National Medical Center, Washington, DC
| | - Hanieh Razzaghi
- Applied Clinical Research Center, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - L. Charles Bailey
- Applied Clinical Research Center, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania,Pediatrics, Perelman School of Medicine at the University of Pennsylvania, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Susan L. Furth
- Pediatrics, Perelman School of Medicine at the University of Pennsylvania, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania,Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Christopher B. Forrest
- Applied Clinical Research Center, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania,Pediatrics, Perelman School of Medicine at the University of Pennsylvania, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Michelle R. Denburg
- Pediatrics, Perelman School of Medicine at the University of Pennsylvania, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania,Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania,Center for Pediatric Clinical Effectiveness, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
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Herrington JD, Hartung EA, Laney NC, Hooper SR, Furth SL. Decreased Neural Connectivity in the Default Mode Network Among Youth and Young Adults With Chronic Kidney Disease. Semin Nephrol 2021; 41:455-461. [PMID: 34916007 DOI: 10.1016/j.semnephrol.2021.09.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
An increasing amount of literature has indicated that chronic kidney disease (CKD) is associated with cognitive deficits that increase with worsening disease severity. Although abnormalities in brain structure have been widely documented, few studies to date have examined the functioning of brain areas associated with the specific cognitive domains affected by CKD (namely, attention and executive functions). Furthermore, few studies have examined functional connectivity among CKD youth who are relatively early in the course of the disease. The present study used functional magnetic resonance imaging to examine the resting state connectivity in 67 youth with CKD (mean age, 17 y) and 58 age-matched healthy controls. Using seed-based multiple regression, decreased connectivity was observed within the anterior cingulate portion of the default mode network. In addition, decreased connectivity within the dorsolateral prefrontal cortex, paracingulate gyrus, and frontal pole were correlated significantly with disease severity. These data indicate that connectivity deficits in circuits implementing attentional processes may represent an early marker for cognitive decline in CKD.
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Affiliation(s)
- John D Herrington
- Center for Autism Research, Children's Hospital of Philadelphia, Philadelphia, PA; Department of Child Psychiatry and Behavioral Science, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.
| | - Erum A Hartung
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, PA; Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Nina C Laney
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, PA
| | - Stephen R Hooper
- Department of Allied Health Sciences, School of Medicine, University of North Carolina School-Chapel Hill, Chapel Hill, NC
| | - Susan L Furth
- Division of Nephrology, Children's Hospital of Philadelphia, Philadelphia, PA; Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA; Department of Epidemiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
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Ng DK, Carroll MK, Kaskel FJ, Furth SL, Warady BA, Greenbaum LA. Patterns of recombinant growth hormone therapy use and growth responses among children with chronic kidney disease. Pediatr Nephrol 2021; 36:3905-3913. [PMID: 34115207 PMCID: PMC8938997 DOI: 10.1007/s00467-021-05122-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 04/01/2021] [Accepted: 05/05/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Recombinant growth hormone (rGH) is an efficacious therapy for growth failure in children with chronic kidney disease (CKD). We described rGH use and estimated its relationship with growth and kidney function in the Chronic Kidney Disease in Children (CKiD) cohort. METHODS Participants included those with growth failure, prevalent rGH users, and rGH initiators who did not meet growth failure criteria. Among those with growth failure, height z scores and GFR were compared between rGH initiators and non-initiators across 42 months. Inverse probability weights accounted for differences in baseline variables in weighted linear regressions. RESULTS Among 148 children with growth failure and no previous rGH therapy, 42 (28%) initiated rGH therapy. Of the initiators, average age was 8.9 years, height z score was 2.50 standard deviations (SDs) (0.6th percentile), and GFR was 44 ml/min/1.73m2. They were compared to 106 children with growth failure who never initiated therapy (8.8 years, -2.33 SDs, and 51 ml/min/1.73m2). At 30 and 42 months after rGH, height increased +0.26 (95%CI: -0.11, +0.62) and +0.35 (95%CI: -0.17, +0.87) SDs, respectively, relative to those who did not initiate rGH. rGH was not associated with GFR. CONCLUSIONS Participants with growth failure receiving rGH experienced significant growth, although this was attenuated relative to RCTs, and were more likely to have higher household income and lower GFR. A substantial number of participants, predominantly boys, without diagnosed growth failure received rGH and had the highest achieved height relative to mid-parental height. Since rGH was not associated with accelerated GFR decline, increasing rGH use in this population is warranted.
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Affiliation(s)
- Derek K Ng
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, 615 N. Wolfe Street Room E7642, Baltimore, MD, 21205, USA.
| | - Megan K Carroll
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Frederick J Kaskel
- Division of Nephrology, Department of Pediatrics, Albert Einstein College of Medicine, New York, New York
| | - Susan L Furth
- Division of Nephrology, Department of Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania,Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia,0020Pennsylvania
| | - Bradley A Warady
- Division of Nephrology, Department of Pediatrics, Children’s Mercy Kansas City, Kansas City, Missouri
| | - Larry A Greenbaum
- Division of Pediatric Nephrology, Emory University School of Medicine and Children’s Healthcare of Atlanta
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50
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Abstract
[Figure: see text].
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Affiliation(s)
- Mark M Mitsnefes
- Cincinnati Children's Hospital Medical Center, OH (M.M.M., G.H.)
| | - Yunwen Xu
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD (Y.X., D.K.N.)
| | - Derek K Ng
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD (Y.X., D.K.N.)
| | - Garick Hill
- Cincinnati Children's Hospital Medical Center, OH (M.M.M., G.H.)
| | - Thomas Kimball
- Department of Pediatrics, Division of Cardiology, Louisiana State University Health Sciences Center, New Orleans, LA (T.K.)
| | - Susan L Furth
- Department of Pediatrics, Division of Nephrology, The Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania (S.L.F.)
| | - Bradley A Warady
- Department of Pediatrics, Division of Nephrology, Children's Mercy Kansas City, MO (B.A.W.)
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