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Vidavalur R, Bhutani VK. Georacial Epidemiological Estimates of Glucose-6-Phosphate Dehydrogenase Deficiency among Newborns in the United States. Am J Perinatol 2024; 41:e1841-e1849. [PMID: 37105226 DOI: 10.1055/a-2082-4859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
OBJECTIVE Glucose-6-phosphate dehydrogenase deficiency (G6PDd) is the most common inherited enzyme deficiency disorder worldwide and a major risk factor for the development of severe hyperbilirubinemia. Racial diversity of phenotypes and genotypes in affected individuals is likely to exist in the United States because of changing population demographics. The aim of the present study was to predict an empirical estimate of annual prevalence of G6PDd in newborns adjusted for geography (state of birth), maternal racial identity, and sex of the infant. STUDY DESIGN Birth statistics (2019) from National Center for Vital Statistics and CDC-WONDER data and race-specific prevalence of G6PDd in the United States were evaluated from published sources. We developed Simpson's diversity index (DI) for each State and correlated these to rates of G6PDd in neonates. Descriptive statistics including modeled prevalence and its association with DI were assessed using the Spearman's rho correlation test. We modeled state-specific prevalence for six states (California, Washington DC, Illinois, Massachusetts, New York, and Pennsylvania) using population-level allele frequencies and race, based on Hardy-Weinberg equilibrium. RESULTS We estimated 78,010 (95% confidence interval: 76,768-79,252) newborns had G6PDd at birth in 2019 with cumulative median prevalence of 17.3 (interquartile range: 12.4-23.2) per 1,000 live births for United States. A strong association was noted for DI and prevalence of G6PDd (p < 0.0005). Five states (Washington DC, Mississippi, Louisiana, Georgia, and Maryland) have the highest projected G6PDd prevalence, with a range of 35 to 48 per 1,000 live births. The probability of G6PDd for female heterozygotes, based on male prevalence, ranged from 1.1 to 7.5% for each cohort in the select six states. CONCLUSION States with diverse populations are likely to have higher rates of G6PDd. These prevalence estimates exceeded by several-fold when compared with disorders screened by existing state mandated newborn screening panels. These discrepancies are further confounded by known risk of severe neonatal hyperbilirubinemia that results with G6PDd and the life-long risk of hemolysis. Combined universal newborn predischarge screening for G6PDd and bilirubin could alert and guide a clinician's practices for parental education and closer medical surveillance during the vulnerable neonatal time period. KEY POINTS · G6PDd is a common X-linked disorder that can present with varied phenotypes among newborns.. · Prevalence of G6PDd and genotype distribution varies with sex, race, and ethnicity.. · We present regional race- and sex-based estimates of G6PDd in the United States..
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Affiliation(s)
- Ramesh Vidavalur
- Department of Neonatology, Cayuga Medical Center/Weill Cornell Medicine, Ithaca, New York
| | - Vinod K Bhutani
- Division of Neonatal and Developmental Medicine, Department of Pediatrics, Stanford Children's Health, Stanford University School of Medicine, Stanford, California
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Al Blewi SM, Alessa RA, Alzahrani LD, Kheder OM, Alissa RA, Alharbi LS, Alsanad LF, Almuzaini AS. Assessment of Parents' Knowledge Regarding Pediatric Glucose-6-Phosphate Dehydrogenase Deficiency in Saudi Arabia. Cureus 2023; 15:e50664. [PMID: 38229803 PMCID: PMC10790601 DOI: 10.7759/cureus.50664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2023] [Indexed: 01/18/2024] Open
Abstract
Introduction Glucose-6-phosphate dehydrogenase deficiency (G6PD) is recognized as the most common enzyme disorder globally, impacting over 400 million individuals. The disease is highly prevalent in Saudi Arabia. This study aimed to assess parents' awareness of G6PD in Saudi Arabia and identify misconceptions for targeted educational interventions, aiming to enhance awareness and condition management. Methods A structured online questionnaire was used to gather information from July 18th, 2023, to August 1st, 2023. The survey targeted parents of Saudi children who resided in various regions across Saudi Arabia and collected a total of 531 responses. Data analysis involved descriptive statistics, chi-square tests, and probit regression. A significance level of p<0.05 was employed to interpret the results. Results A statistically significant associations were found among parents with Glucose-6-phosphate dehydrogenase deficiency-deficient children, including gender-related (odd ratio = 2.91, 99% CI: 1.986-4.301), awareness of the genetic link (odd ratio = 2.49, 99% CI: 1.701-3.639), specific medications (odd ratio =1.890, 99% CI: 1.262-2.853), loss of appetite (odd ratio= 0.629, 95% CI: 0.398-0.990), jaundice (odd ratio = 3.01, 99% CI: 1.877-4.983), increased fluid intake (odd ratio= 1.53, 95% CI: 1.091-2.139), receiving blood transfusions (odd ratio = 1.54, 95% CI: 1.101-2.157), seeking online information (odd ratio = 1.92, 99% CI: 1.250-2.940), and consulting healthcare professionals (odd ratio = 3.24, 99% CI: 2.065-5.107). Conclusion Regional disparities in glucose-6-phosphate dehydrogenase deficiency awareness among parents in Saudi Arabia are evident, with the central region demonstrating the highest level of awareness. Understanding glucose-6-phosphate dehydrogenase deficiency risk factors, medication triggers, and clinical symptoms plays a significant role in parental knowledge, emphasizing the need for region-specific education and awareness programs.
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Affiliation(s)
- Sawsan M Al Blewi
- Pediatric Hematology Oncology/Faculty of Medicine, University of Tabuk, Tabuk, SAU
| | - Rawiyah A Alessa
- College of Medicine, Faculty of Medicine, University of Tabuk, Tabuk, SAU
| | - Lena D Alzahrani
- College of Medicine, Faculty of Medicine, University of Tabuk, Tabuk, SAU
| | - Omar M Kheder
- College of Medicine, Taibah University, Madinah, SAU
| | - Rand A Alissa
- College of Medicine, Majmaah University, Majmaah City, SAU
| | - Lama S Alharbi
- College of Medicine, Ibn Sina National College, Jeddah, SAU
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Al-Omran AM, Shapan HA, Al-Abdi SY. A retrospective comparison of phototherapy need in O-B versus O-A incompatibility in a single Saudi institution. J Neonatal Perinatal Med 2023:NPM221136. [PMID: 37182846 DOI: 10.3233/npm-221136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
BACKGROUND ABO incompatibility is a major risk factor for neonatal indirect hyperbilirubinemia (NIH), requiring treatment. It has been shown that there are racial differences in direct antiglobulin test (DAT) positivity and phototherapy need in the O--B versus (vs) O--A incompatibility. The comparison between the O--B and O--A incompatibility is not well studied in Saudi Arabia. AIMS We aimed to compare DAT positivity and phototherapy need in O-B vs O-A incompatibility in Saudi Arabia. METHODS This retrospective cohort study was conducted in one Saudi hospital. We included a convenience sample of neonates born between 01 January 2013 and 31 December 2021. We included healthy neonates admitted to the nursery care unit only, born at≥38 weeks gestation, and had normal G6PD levels. Neonates that had no G6PD level measurement or lost follow-up post-discharge were excluded. The data span was the first 14 days of life. RESULTS A total of 611 neonates met our inclusion criteria. Positive DAT was more prevalent in the O-B than the O-A incompatibility [43.5% vs 29.2%, p < 0.001). A greater odd of phototherapy need was observed in the O--B vs O-A incompatibility across various strata. Readmission for NIH, use of 360° exposure phototherapy, or intravenous immunoglobulin administration was more prevalent in the O-B than the O-A incompatibility (13.2% vs 5.0%, p < 0.001). A logistic regression analysis revealed that the O-B incompatibility modified the association between DAT positivity and phototherapy need. CONCLUSIONS The O-B incompatibility had a mediator effect on the relationship between DAT positivity and the need for phototherapy in the study population, which emphasizes that the O-B and O-A are not the same from the NIH point of view.
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Affiliation(s)
- A M Al-Omran
- Department of Pediatrics, Almana General Hospital, Al-Ahsa, Saudi Arabia
| | - H A Shapan
- Department of Pediatrics, Almana General Hospital, Al-Ahsa, Saudi Arabia
| | - S Y Al-Abdi
- Department of Pediatrics, King Abdulaziz Hospital, Ministry of National Guard Hospital, Al-Ahsa, Saudi Arabia
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Farhadi R, Keyhanian E, Naderisorki M, Nadi Ghara A. Effects of Two Different Doses of Ursodeoxycholic Acid on Indirect Hyperbilirubinemia in Neonates with Glucose-6-phosphate Dehydrogenase Deficiency Treated with Phototherapy: A Randomized Controlled Trial. Glob Pediatr Health 2023; 10:2333794X231156055. [PMID: 36814535 PMCID: PMC9940175 DOI: 10.1177/2333794x231156055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 01/22/2023] [Indexed: 02/19/2023] Open
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) deficiency is one of the causes of severe hyperbilirubinemia, prolonged jaundice, and bilirubin-induced encephalopathy in neonates. In a randomized controlled trial, we evaluated the effect of oral ursodeoxycholic acid (UDCA) on indirect hyperbilirubinemia in G6PD-deficient neonates requiring phototherapy. Intervention group I (N = 45; received phototherapy and 10 mg/kg/day UDCA), Intervention group II (N = 40; received phototherapy and 20 mg/kg/day UDCA), and a control group (N = 49; received phototherapy and placebo). Levels of total serum bilirubin (TSB) in all 3 groups decreased significantly over time (P = .001) but the level of TSB at different hours after admission and the duration of phototherapy did not differ significantly between the 3 groups. After discharge, the 2 intervention groups had a significantly lower rate of readmission than the control group (P = .001). No significant difference was observed between the 10 and 20 mg/kg/day groups. Further evaluation is recommended, especially in terms of the pharmacokinetics of UDCA in neonates. Trial registration number: IRCT20091201002801N4, prospectively registered on 2019-06-1.
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Affiliation(s)
- Roya Farhadi
- Pediatric Infectious Diseases Research Center, Mazandaran University of Medical Sciences, Sari, Iran,Roya Farhadi, Division of Neonatology, Department of Pediatrics, Boo Ali Sina Hospital, Mazandaran University of Medical Sciences, Pasdaran Boulevard, Sari 4816777145, Iran.
| | - Elham Keyhanian
- Pediatric Infectious Diseases Research Center, Mazandaran University of Medical Sciences, Sari, Iran
| | - Mohammad Naderisorki
- Thalassemia Research Center, Hemoglobinopathy Institute, Mazandaran University of Medical Sciences, Sari, Iran
| | - Aliasghar Nadi Ghara
- Health Science Research Center, Addiction Institute, Mazandaran University of Medical Sciences, Sari, Iran
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Al-Abdi SY, Al-Omran AM, Shapan HA. Cord Platelet Count of Full-Term Neonates in Relation to ABO Incompatibility and Glucose-6-Phosphate Dehydrogenase Levels: A Retrospective Cohort Study. Cureus 2022; 14:e30284. [PMID: 36407223 PMCID: PMC9654656 DOI: 10.7759/cureus.30284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/13/2022] [Indexed: 05/28/2023] Open
Abstract
Background The immunoglobulin G of mothers with O blood type may sensitize the platelets of their neonates with A (O-A incompatibility) or B (O-B incompatibility) blood type. As the expression and antigenicity of the B antigen on platelets is less than that of the A antigens, we have hypothesized that platelet count is higher in the O-B incompatibility group compared to the O-A incompatibility group. There is controversy about whether glucose-6-phosphate dehydrogenase (G6PD) deficiency, without evidence of hemolysis, is associated with a lower platelet count than G6PD-normal. Aim To assess whether platelet count is higher in the O-B than in the O-A incompatible neonates and whether it correlates with their G6PD levels. Methods This study was a retrospective cohort study on a sample of 835 healthy neonates born at ≥38 weeks gestation who were either A or B blood types with mothers that carried the blood type O Rh-positive. The platelet count (thousand per microliter) from umbilical cord venous blood (UCVB) was used. A G6PD level of 11.0 units/gram of hemoglobin (U/g Hb) was considered the lower reference limit. G6PD deficiency was defined as a G6PD level of <3.3 U/g Hb in both sexes. Intermediate G6PD deficiency in females was described as a G6PD level of 3.3-8.8 U/g Hb. Results The mean UCVB platelet count was higher in female neonates compared to male neonates (n=389, 283±65 versus n=446, 272±73, p=0.01). The mean UCVB platelet count was higher in the O-B incompatibility group in both male (n=114, 291±82 versus n=103, 266±63) and female neonates (n=83, 303±66 versus n=81, 278±58) with G6PD levels of >8.8 U/g Hb. There was a positive weak correlation between UCVB platelet counts and G6PD levels only in O-B incompatible female neonates (n=176, r=0.23, p=0.002). The partitioning and combined 95% reference intervals (RIs) of the UCVB platelet count were presented. Conclusion The platelet count was higher in the O-B incompatibility group compared to the O-A incompatibility group, but only when the G6PD level was >8.8 U/g Hb. A correlation between UCVB platelet count and G6PD levels was found only among O-B incompatible female neonates. These findings may have an important implication in estimating RIs of the UCVB platelet count, however, they need to be confirmed and explored in future research.
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Hamali HA. Glucose-6-Phosphate Dehydrogenase Deficiency: An Overview of the Prevalence and Genetic Variants in Saudi Arabia. Hemoglobin 2022; 45:287-295. [DOI: 10.1080/03630269.2022.2034644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Hassan A. Hamali
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Gizan, Saudi Arabia
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Garcia AA, Koperniku A, Ferreira JCB, Mochly-Rosen D. Treatment strategies for glucose-6-phosphate dehydrogenase deficiency: past and future perspectives. Trends Pharmacol Sci 2021; 42:829-844. [PMID: 34389161 DOI: 10.1016/j.tips.2021.07.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 06/19/2021] [Accepted: 07/13/2021] [Indexed: 01/20/2023]
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) maintains redox balance in a variety of cell types and is essential for erythrocyte resistance to oxidative stress. G6PD deficiency, caused by mutations in the G6PD gene, is present in ~400 million people worldwide, and can cause acute hemolytic anemia. Currently, there are no therapeutics for G6PD deficiency. We discuss the role of G6PD in hemolytic and nonhemolytic disorders, treatment strategies attempted over the years, and potential reasons for their failure. We also discuss potential pharmacological pathways, including glutathione (GSH) metabolism, compensatory NADPH production routes, transcriptional upregulation of the G6PD gene, highlighting potential drug targets. The needs and opportunities described here may motivate the development of a therapeutic for hematological and other chronic diseases associated with G6PD deficiency.
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Affiliation(s)
- Adriana A Garcia
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, Stanford, CA, USA
| | - Ana Koperniku
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, Stanford, CA, USA
| | - Julio C B Ferreira
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, Stanford, CA, USA; Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Daria Mochly-Rosen
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, Stanford, CA, USA.
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Albagshi MH, Alomran S, Sloma S, Albagshi M, Alsuweel A, AlKhalaf H. Prevalence of Glucose-6-Phosphate Dehydrogenase Deficiency Among Children in Eastern Saudi Arabia. Cureus 2020; 12:e11235. [PMID: 33269163 PMCID: PMC7704170 DOI: 10.7759/cureus.11235] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background Glucose-6-phosphate dehydrogenase (G6PD) deficiency is the most common red blood cell enzyme deficiency worldwide. The disease is widely distributed in regions where malaria is prevalent, affecting mostly males because the enzyme is inherited as an X-link recessive pattern. In Saudi Arabia, we lack newborn screening (NBS) for G6PD deficiency, despite early reports about high prevalence. Methods This is a 10-year retrospective study of children who were screened for G6PD deficiency during their hospitalization between January 2008 to December 2017. The test was carried out using a qualitative fluorescence test suitable for mass screening to determine the prevalence of G6PD deficiency among the admitted children between 0 and 14 years of age. Results A total of 48,889 patients were screened which included 27,634 (56.5%) males and 21,255 (43.5%) females with a mean age of 1.93 + 3.98 years. The overall prevalence of G6PD deficiency was 25%, whereas it was 33.8% in the male subset and 13.2% in the female subset. Male sex was significantly correlated with G6PD deficiency. A total of 25,628 newborns were screened, with 14,219 (55.5%) males and 11,409 (44.5%) females, who had a G6PD deficiency prevalence of 18.8%. There was a G6PD deficiency prevalence of 26% in males and 9.9% in females. Conclusion The present study confirms the high prevalence of G6PD deficiency in our community. Therefore, we need to establish an NBS program to screen for G6PD deficiency in order to prevent neonatal hyperbilirubinemia encephalopathy, avoidable hemolytic episodes, and to increase awareness among health practitioners.
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Affiliation(s)
- Muneer H Albagshi
- Department of Pediatric Hematology, Hereditary Blood Diseases Center, Al-Ahsa, SAU
| | - Suad Alomran
- Department of Laboratories and Blood Bank, Maternity and Children Hospital, Al-Ahsa, SAU
| | - Somaya Sloma
- Department of Laboratories and Blood Bank, Maternity and Children Hospital, Al-Ahsa, SAU
| | - Murtadha Albagshi
- Department of Pediatrics, Maternity and Children Hospital, Al-Ahsa, SAU
| | - Abdullah Alsuweel
- Department of Hematologic Technology, Maternity and Children Hospital, Al-Ahsa, SAU
| | - Helal AlKhalaf
- Department of Hematologic Technology, Maternity and Children Hospital, Al-Ahsa, SAU
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Roles of UGT1A1 Gly71Arg and TATA promoter polymorphisms in neonatal hyperbilirubinemia: A meta-analysis. Gene 2020; 736:144409. [DOI: 10.1016/j.gene.2020.144409] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 01/27/2020] [Indexed: 11/20/2022]
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Fei F, Marques MB, Staley EM, Williams LA. An Automated Method for Direct Antiglobulin Testing and the Resulting Amount of Phototherapy Used at a Large Academic Medical Center. Lab Med 2020; 51:50-55. [PMID: 31150549 DOI: 10.1093/labmed/lmz029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVE To evaluate how clinical practice was affected by the change in direct antiglobulin testing (DAT) methodologies and subsequent stronger reported DAT results at our large academic medical center. METHOD We retrospectively reviewed DAT results of umbilical cord blood from infants with blood type A or B born to mothers with antibody-negative type O blood, based on records kept at the University of Alabama at Birmingham (UAB) Hospital, a 1400-bed academic medical center. RESULTS We randomly chose 50 neonates with positive DAT results who had been tested using the tube method and 50 whose testing had used the gel method. Although 86% of results with the tube method were positive microscopically, 52% and 40% of the DAT results with the gel method were 1+ and 2+ positive, respectively. Further, we observed an increase in the number of neonates treated with phototherapy who had been tested using the gel method. CONCLUSION We report that DATs performed using the gel method had increased DAT strength compared with tube testing, which led to increased use of phototherapy by our clinical colleagues.
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Affiliation(s)
- Fei Fei
- Department of Pathology, University of Alabama at Birmingham
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Zhou H, Roberts PA, Dhaliwal SS, Della PR. Risk factors associated with paediatric unplanned hospital readmissions: a systematic review. BMJ Open 2019; 9:e020554. [PMID: 30696664 PMCID: PMC6352831 DOI: 10.1136/bmjopen-2017-020554] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 09/21/2018] [Accepted: 10/23/2018] [Indexed: 01/19/2023] Open
Abstract
OBJECTIVE To synthesise evidence on risk factors associated with paediatric unplanned hospital readmissions (UHRs). DESIGN Systematic review. DATA SOURCE CINAHL, EMBASE (Ovid) and MEDLINE from 2000 to 2017. ELIGIBILITY CRITERIA Studies published in English with full-text access and focused on paediatric All-cause, Surgical procedure and General medical condition related UHRs were included. DATA EXTRACTION AND SYNTHESIS Characteristics of the included studies, examined variables and the statistically significant risk factors were extracted. Two reviewers independently assessed study quality based on six domains of potential bias. Pooling of extracted risk factors was not permitted due to heterogeneity of the included studies. Data were synthesised using content analysis and presented in narrative form. RESULTS Thirty-six significant risk factors were extracted from the 44 included studies and presented under three health condition groupings. For All-cause UHRs, ethnicity, comorbidity and type of health insurance were the most frequently cited factors. For Surgical procedure related UHRs, specific surgical procedures, comorbidity, length of stay (LOS), age, the American Society of Anaesthesiologists class, postoperative complications, duration of procedure, type of health insurance and illness severity were cited more frequently. The four most cited risk factors associated with General medical condition related UHRs were comorbidity, age, health service usage prior to the index admission and LOS. CONCLUSIONS This systematic review acknowledges the complexity of readmission risk prediction in paediatric populations. This review identified four risk factors across all three health condition groupings, namely comorbidity; public health insurance; longer LOS and patients<12 months or between 13-18 years. The identification of risk factors, however, depended on the variables examined by each of the included studies. Consideration should be taken into account when generalising reported risk factors to other institutions. This review highlights the need to develop a standardised set of measures to capture key hospital discharge variables that predict unplanned readmission among paediatric patients.
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Affiliation(s)
- Huaqiong Zhou
- General Surgical Ward, Princess Margret Hospital for Children, Perth, Western Australia, Australia
- School of Nursing, Midwifery and Paramedicine, Curtin University, Perth, Western Australia, Australia
| | - Pam A Roberts
- School of Nursing, Midwifery and Paramedicine, Curtin University, Perth, Western Australia, Australia
| | | | - Phillip R Della
- School of Nursing, Midwifery and Paramedicine, Curtin University, Perth, Western Australia, Australia
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