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Mehta R, Hochberg M, Shardell M, Ryan A, Dong Y, Beamer BA, Peer J, Stuart EA, Schuler M, Gallo JJ, Rathbun AM. Evaluation of Dynamic Effects of Depressive Symptoms on Physical Function in Knee Osteoarthritis. Arthritis Care Res (Hoboken) 2024; 76:673-681. [PMID: 38200641 PMCID: PMC11039384 DOI: 10.1002/acr.25295] [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] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 11/01/2023] [Accepted: 01/04/2024] [Indexed: 01/12/2024]
Abstract
OBJECTIVE To assess how changes in depressive symptoms influence physical function over time among those with radiographic knee osteoarthritis (OA). METHODS Participants from the Osteoarthritis Initiative with radiographic knee OA (n = 2,212) and complete data were identified at baseline. Depressive symptoms were assessed as a time-varying score at baseline and the first three annual follow-up visits using the Center for Epidemiological Studies Depression Scale (CES-D) Scale. Physical function was measured at the first four follow-up visits using 20-meter gait speed meters per second. The following two marginal structural models were fit: one assessing the main effect of depressive symptoms on gait speed and another assessing time-specific associations. RESULTS Time-adjusted results indicated that higher CES-D scores were significantly associated with slower gait speed (-0.0048; 95% confidence interval -0.0082 to -0.0014), and time-specific associations of CES-D were largest during the first follow-up interval (-0.0082; 95% confidence interval -0.0128 to -0.0035). During subsequent follow-up time points, the influence of depressive symptoms on gait speed diminished. CONCLUSION The negative effect of depressive symptoms on physical function may decrease over time as knee OA progresses.
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Affiliation(s)
- Rhea Mehta
- PhD Program in Gerontology, University of Maryland, Baltimore and Baltimore County
| | - Marc Hochberg
- Department of Epidemiology and Public Health
- Department of Medicine, University of Maryland School of Medicine
- Medical Clinical Care Center, VA Maryland Health Care System
| | | | - Alice Ryan
- Department of Medicine, University of Maryland School of Medicine
- Geriatric Research Education and Clinical Center, VA Maryland Health Care System
| | - Yu Dong
- Department of Psychiatry, University of Maryland School of Medicine
| | - Brock A. Beamer
- Department of Medicine, University of Maryland School of Medicine
- Geriatric Research Education and Clinical Center, VA Maryland Health Care System
| | - Jason Peer
- Department of Psychiatry, University of Maryland School of Medicine
- Mental Health Clinical Care Center, VA Maryland Health Care System
| | - Elizabeth A. Stuart
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health
| | | | - Joseph J. Gallo
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health
| | - Alan M. Rathbun
- Department of Epidemiology and Public Health
- Department of Medicine, University of Maryland School of Medicine
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2
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Shen B, Ren H, Shardell M, Falvey J, Chen C. Analyzing risk factors for post-acute recovery in older adults with Alzheimer's disease and related dementia: A new semi-parametric model for large-scale medicare claims. Stat Med 2024; 43:1003-1018. [PMID: 38149345 PMCID: PMC10922471 DOI: 10.1002/sim.9982] [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: 04/09/2023] [Revised: 10/11/2023] [Accepted: 11/21/2023] [Indexed: 12/28/2023]
Abstract
Nearly 300,000 older adults experience a hip fracture every year, the majority of which occur following a fall. Unfortunately, recovery after fall-related trauma such as hip fracture is poor, where older adults diagnosed with Alzheimer's disease and related dementia (ADRD) spend a particularly long time in hospitals or rehabilitation facilities during the post-operative recuperation period. Because older adults value functional recovery and spending time at home versus facilities as key outcomes after hospitalization, identifying factors that influence days spent at home after hospitalization is imperative. While several individual-level factors have been identified, the characteristics of the treating hospital have recently been identified as contributors. However, few methodological rigorous approaches are available to help overcome potential sources of bias such as hospital-level unmeasured confounders, informative hospital size, and loss to follow-up due to death. This article develops a useful tool equipped with unsupervised learning to simultaneously handle statistical complexities that are often encountered in health services research, especially when using large administrative claims databases. The proposed estimator has a closed form, thus only requiring light computation load in a large-scale study. We further develop its asymptotic properties with stabilized inference assisted by unsupervised clustering. Extensive simulation studies demonstrate superiority of the proposed estimator compared to existing estimators.
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Affiliation(s)
- Biyi Shen
- Regeneron Pharmaceuticals, New Jersey, U.S.A
| | - Haoyu Ren
- Department of Mathematics and Statistics, University of Maryland, Baltimore County, Maryland, U.S.A
| | - Michelle Shardell
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Maryland, U.S.A
| | - Jason Falvey
- Department of Physical Therapy and Rehabilitation Science, University of Maryland School of Medicine, Maryland, U.S.A
| | - Chixiang Chen
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Maryland, U.S.A
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3
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Holm JB, France MT, Gajer P, Ma B, Brotman RM, Shardell M, Forney L, Ravel J. Correction: Integrating compositional and functional content to describe vaginal microbiomes in health and disease. Microbiome 2024; 12:21. [PMID: 38321533 PMCID: PMC10845452 DOI: 10.1186/s40168-024-01765-5] [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] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Affiliation(s)
- Johanna B Holm
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michael T France
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Pawel Gajer
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Bing Ma
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Rebecca M Brotman
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michelle Shardell
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Larry Forney
- Department of Biological Sciences, University of Idaho, Moscow, ID, USA
| | - Jacques Ravel
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA.
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA.
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Falvey JR, Chen C, Johnson A, Ryan KA, Shardell M, Ren H, Reider L, Magaziner J. Associations of Days Spent at Home Before Hip Fracture With Postfracture Days at Home and 1-Year Mortality Among Medicare Beneficiaries Living With Alzheimer's Disease or Related Dementias. J Gerontol A Biol Sci Med Sci 2023; 78:2356-2362. [PMID: 37402643 PMCID: PMC10692421 DOI: 10.1093/gerona/glad158] [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: 02/22/2023] [Indexed: 07/06/2023] Open
Abstract
BACKGROUND Hip fracture is a disabling event experienced disproportionately by older adults with Alzheimer's disease or related dementias (ADRD). Claims information recorded prior to a hip fracture could provide valuable insights into recovery potential for these patients. Thus, our objective was to identify distinct trajectories of claims-based days at home (DAH) before a hip fracture among older adults with ADRD and evaluate associations with postfracture DAH and 1-year mortality. METHODS We conducted a cohort study of 16 576 Medicare beneficiaries living with ADRD who experienced hip fracture between 2010 and 2017. Growth mixture modeling was used to estimate trajectories of DAH assessed from 180 days prior to fracture until index fracture admission, and their joint associations with postfracture DAH trajectories and 1-year mortality. RESULTS Before a hip fracture, a model with 3 distinct latent DAH trajectories was the best fit. Trajectories were characterized based on their temporal patterns as Consistently High (n = 14 980, 90.3%), Low but Increasing (n = 809, 5.3%), or Low and Decreasing (n = 787, 4.7%). Membership in the Low and Decreasing prefracture DAH trajectory was associated with less favorable postfracture DAH trajectories, and a 65% higher 1-year mortality rate (hazard ratio 1.65, 95% confidence interval 1.45-1.87) as compared to those in the Consistently High trajectory. Similar albeit weaker associations with these outcomes were observed for hip fracture survivors in the Low but Improving prefracture DAH trajectory. CONCLUSIONS Distinct prefracture DAH trajectories among hip fracture survivors with ADRD are strongly linked to postfracture DAH and 1-year mortality, which could guide development of tailored interventions.
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Affiliation(s)
- Jason R Falvey
- Department of Physical Therapy and Rehabilitation Science, University of Maryland School of Medicine, Baltimore, Maryland, USA
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Chixiang Chen
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Abree Johnson
- Department of Practice, Sciences and Health Outcomes Research, University of Maryland School of Pharmacy, Baltimore, Maryland, USA
| | - Kathleen A Ryan
- Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Michelle Shardell
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Haoyu Ren
- Department of Mathematics and Statistics, University of Maryland, Baltimore County, Baltimore, Maryland, USA
| | - Lisa Reider
- Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Jay Magaziner
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
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5
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Holm JB, France MT, Gajer P, Ma B, Brotman RM, Shardell M, Forney L, Ravel J. Integrating compositional and functional content to describe vaginal microbiomes in health and disease. Microbiome 2023; 11:259. [PMID: 38031142 PMCID: PMC10688475 DOI: 10.1186/s40168-023-01692-x] [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] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 10/07/2023] [Indexed: 12/01/2023]
Abstract
BACKGROUND A Lactobacillus-dominated vaginal microbiome provides the first line of defense against adverse genital tract health outcomes. However, there is limited understanding of the mechanisms by which the vaginal microbiome modulates protection, as prior work mostly described its composition through morphologic assessment and marker gene sequencing methods that do not capture functional information. To address this gap, we developed metagenomic community state types (mgCSTs) which use metagenomic sequences to describe and define vaginal microbiomes based on both composition and functional potential. RESULTS MgCSTs are categories of microbiomes classified using taxonomy and the functional potential encoded in their metagenomes. MgCSTs reflect unique combinations of metagenomic subspecies (mgSs), which are assemblages of bacterial strains of the same species, within a microbiome. We demonstrate that mgCSTs are associated with demographics such as age and race, as well as vaginal pH and Gram stain assessment of vaginal smears. Importantly, these associations varied between mgCSTs predominated by the same bacterial species. A subset of mgCSTs, including three of the six predominated by Gardnerella vaginalis mgSs, as well as mgSs of L. iners, were associated with a greater likelihood of bacterial vaginosis diagnosed by Amsel clinical criteria. This L. iners mgSs, among other functional features, encoded enhanced genetic capabilities for epithelial cell attachment that could facilitate cytotoxin-mediated cell lysis. Finally, we report a mgSs and mgCST classifier for which source code is provided and may be adapted for use by the microbiome research community. CONCLUSIONS MgCSTs are a novel and easily implemented approach to reduce the dimension of complex metagenomic datasets while maintaining their functional uniqueness. MgCSTs enable the investigation of multiple strains of the same species and the functional diversity in that species. Future investigations of functional diversity may be key to unraveling the pathways by which the vaginal microbiome modulates the protection of the genital tract. Importantly, our findings support the hypothesis that functional differences between vaginal microbiomes, including those that may look compositionally similar, are critical considerations in vaginal health. Ultimately, mgCSTs may lead to novel hypotheses concerning the role of the vaginal microbiome in promoting health and disease, and identify targets for novel prognostic, diagnostic, and therapeutic strategies to improve women's genital health. Video Abstract.
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Affiliation(s)
- Johanna B Holm
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michael T France
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Pawel Gajer
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Bing Ma
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Rebecca M Brotman
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michelle Shardell
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Larry Forney
- Department of Biological Sciences, University of Idaho, Moscow, ID, USA
| | - Jacques Ravel
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA.
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA.
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Estaki M, Langsetmo L, Shardell M, Mischel A, Jiang L, Zhong Y, Kaufmann C, Knight R, Stone K, Kado D. Association of Subjective and Objective Measures of Sleep With Gut Microbiota Composition and Diversity in Older Men: The Osteoporotic Fractures in Men Study. J Gerontol A Biol Sci Med Sci 2023; 78:1925-1932. [PMID: 36655399 PMCID: PMC10562887 DOI: 10.1093/gerona/glad011] [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: 08/09/2022] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Growing evidence suggests bidirectional links between gut microbiota and sleep quality as shared contributors to health. Little is known about the relationship between microbiota and sleep among older persons. METHODS We used 16S rRNA sequencing to characterize stool microbiota among men (n = 606, mean [standard deviation] age = 83.9 [3.8]) enrolled in the Osteoporotic Fractures in Men (MrOS) study from 2014 to 2016. Sleep was assessed concurrently by a questionnaire (Pittsburgh Sleep Quality index [PSQI]), and activity monitor to examine timing (acrophase) and regularity of patterns (F-statistic). Alpha diversity was measured using Faith's phylogenetic diversity (PD). Beta diversity was calculated with robust Aitchison distance with matrix completion (RPCA) and phylogenetic-RPCA (PRPCA). Their association with sleep variables was tested with partial distance-based redundancy analysis (dbRDA). Predictive-ratio biomarkers associated with sleep measurements were identified with CoDaCoRe. RESULTS In unadjusted analyses, men with poor sleep (PSQI >5) tended to have lower alpha diversity compared to men with normal sleep (Faith's PD, beta = -0.15; 95% confidence interval [CI]: -0.30 to 0.01, p = .06). Sleep regularity was significantly associated with RPCA and PRPCA, even after adjusting for site, batch, age, ethnicity, body mass index, diabetes, antidepressant and sleep medication use, and health behaviors (RPCA/PRPCA dbRDA; p = .033/.002). In taxonomic analysis, ratios of 7:6 bacteria for better regularity (p = .0004) and 4:7 for worse self-reported sleep (p = .005) were differentially abundant: some butyrate-producing bacteria were associated with better sleep characteristics. CONCLUSIONS Subjective and objective indicators of sleep quality suggest that older men with better sleep patterns are more likely to harbor butyrate-producing bacteria associated with better health.
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Affiliation(s)
- Mehrbod Estaki
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Lisa Langsetmo
- Center for Care Delivery and Outcomes Research, Minneapolis VA Health Care System, Minneapolis, Minnesota, USA
| | - Michelle Shardell
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Anna Mischel
- School of Medicine, University of California San Diego, La Jolla, California, USA
| | - Lingjing Jiang
- Janssen Research and Development Los Angeles, Los Angeles, California, USA
| | - Yuan Zhong
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, Michigan, USA
| | - Christopher Kaufmann
- Department of Aging and Geriatric Research, University of Florida College of Medicine, Gainesville, Florida, USA
| | - Rob Knight
- Department of Pediatrics, UC San Diego, La Jolla, California, USA
- UC San Diego Center for Microbiome Innovation, La Jolla, California, USA
- Department of Computer Science and Engineering, UC San Diego, La Jolla, California, USA
- Department of Bioengineering, UC San Diego, La Jolla, California, USA
| | - Katie Stone
- Department of Research, California Pacific Medical Center Research Institute, San Francisco, California, USA
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California, USA
| | - Deborah Kado
- Geriatrics Section, Stanford University School of Medicine, Palo Alto, California, USA
- Veterans Health Administration, Geriatrics Research Education and Clinical Center, Palo Alto, California, USA
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7
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Holm JB, France MT, Gajer P, Ma B, Brotman RM, Shardell M, Forney L, Ravel J. High-resolution functional description of vaginal microbiomes in health and disease. bioRxiv 2023:2023.03.24.533147. [PMID: 36993583 PMCID: PMC10055360 DOI: 10.1101/2023.03.24.533147] [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: 06/19/2023]
Abstract
Background A Lactobacillus-dominated vaginal microbiome provides the first line of defense against numerous adverse genital tract health outcomes. However, there is limited understanding of the mechanisms by which the vaginal microbiome modulates protection, as prior work mostly described its composition through morphologic assessment and marker gene sequencing methods that do not capture functional information. To address this limitation, we developed metagenomic community state types (mgCSTs) which uses metagenomic sequences to describe and define vaginal microbiomes based on both composition and function. Results MgCSTs are categories of microbiomes classified using taxonomy and the functional potential encoded in their metagenomes. MgCSTs reflect unique combinations of metagenomic subspecies (mgSs), which are assemblages of bacterial strains of the same species, within a microbiome. We demonstrate that mgCSTs are associated with demographics such as age and race, as well as vaginal pH and Gram stain assessment of vaginal smears. Importantly, these associations varied between mgCSTs predominated by the same bacterial species. A subset of mgCSTs, including three of the six predominated by Gardnerella mgSs, as well as a mgSs of L. iners, were associated with a greater likelihood of Amsel bacterial vaginosis diagnosis. This L. iners mgSs, among other functional features, encoded enhanced genetic capabilities for epithelial cell attachment that could facilitate cytotoxin-mediated cell lysis. Finally, we report a mgSs and mgCST classifier as an easily applied, standardized method for use by the microbiome research community. Conclusions MgCSTs are a novel and easily implemented approach to reducing the dimension of complex metagenomic datasets, while maintaining their functional uniqueness. MgCSTs enable investigation of multiple strains of the same species and the functional diversity in that species. Future investigations of functional diversity may be key to unraveling the pathways by which the vaginal microbiome modulates protection to the genital tract. Importantly, our findings support the hypothesis that functional differences between vaginal microbiomes, including those that may look compositionally similar, are critical considerations in vaginal health. Ultimately, mgCSTs may lead to novel hypotheses concerning the role of the vaginal microbiome in promoting health and disease, and identify targets for novel prognostic, diagnostic, and therapeutic strategies to improve women's genital health.
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Affiliation(s)
- Johanna B. Holm
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michael T. France
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Pawel Gajer
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Bing Ma
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Rebecca M. Brotman
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michelle Shardell
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Larry Forney
- Department of Biological Sciences, University of Idaho, Moscow, ID
| | - Jacques Ravel
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
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Bailey MD, Gambert S, Gruber-Baldini A, Guralnik J, Kozar R, Qato DM, Shardell M, Albrecht JS. Traumatic Brain Injury and Risk of Long-Term Nursing Home Entry among Older Adults: An Analysis of Medicare Administrative Claims Data. J Neurotrauma 2023; 40:86-93. [PMID: 35793112 PMCID: PMC10162579 DOI: 10.1089/neu.2022.0003] [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] [Indexed: 01/10/2023] Open
Abstract
Traumatic brain injury (TBI) is a leading cause of injury-related disability among older adults, and there is increasing interest in post-discharge management as this population grows. We evaluated the association between TBI and long-term nursing home (NH) entry among a nationally representative sample of older adults. We identified 207,355 adults aged ≥65 years who received a diagnosis of either a TBI, non-TBI trauma, or were uninjured between January 2008 and June 2015 from a 5% sample of Medicare beneficiaries. The NH entry was operationalized as the first NH admission that resulted in a stay ≥100 days. Time to NH entry was calculated as the difference between the NH entry date and the index date (the date of TBI, non-TBI trauma, or inpatient/outpatient visit in the uninjured group). We used cause-specific Cox proportional hazards models with stabilized inverse probability of exposure weights to model time to NH entry as a function of injury in the presence of death as a competing risk and generated hazard ratios (HR) and 95% confidence intervals (CI). After excluding beneficiaries living in a NH at index, there were 60,600 TBI, 63,762 non-TBI trauma, and 69,893 uninjured beneficiaries in the sample. In weighted models, beneficiaries with TBI entered NHs at higher rates relative to the non-TBI trauma (HR 1.15; 95% CI 1.10, 1.20) and uninjured (HR 1.67; 95% CI 1.60, 1.74) groups. Future research should focus on interventions to retain older adult TBI survivors within the community.
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Affiliation(s)
- M. Doyinsola Bailey
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Steven Gambert
- Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Ann Gruber-Baldini
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Jack Guralnik
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Rosemary Kozar
- R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Danya M. Qato
- Department of Pharmaceutical Health Services Research, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Michelle Shardell
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Jennifer S. Albrecht
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA
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Mehta R, Shardell M, Ryan A, Dong Y, Beamer B, Hochberg M, Rathbun A. ASSOCIATION OF PERSISTENT DEPRESSIVE SYMPTOMS WITH PHYSICAL ACTIVITY IN KNEE OSTEOARTHRITIS. Innov Aging 2022. [PMCID: PMC9767224 DOI: 10.1093/geroni/igac059.2597] [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] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Comorbid depression in knee osteoarthritis (OA) is associated with declines in physical activity, but how persistent depressive symptoms impact physical activity over time remains unclear. We aimed to determine how the persistence of depressive symptoms affects physical activity in knee OA. Participants (n=2,222) from the Osteoarthritis Initiative had radiographic disease (Kellgren-Lawrence grade ≥ 2) in at least one knee. The Center for Epidemiologic Studies Depression Scale (CES-D; range = 0-60) assessed depressive symptoms from baseline through the first three annual follow-up visits, and persistence was operationalized using the cumulative average severity of symptoms over time. Self-reported physical activity was measured from the first to fourth annual follow-up visit using the Physical Activity Scale for the Elderly (PASE; range = 0-793). The primary method of analysis utilized marginal structural models and included exposure by time interactions in the structural outcome model. Baseline depressive symptoms negatively impacted physical activity at the first follow-up (β = -0.7279; 95% CI: -1.1645, -0.2912), but at later time points, effect estimates were closer to the null and not statistically significant. The association between time-averaged CES-D scores from baseline through the first follow-up and physical activity at year two was -0.1410 (95% CI: -0.7105, 0.4286); and 0.2578 (95% CI: -0.3261, 0.8415) for average CES-D scores through follow-up visit two and physical activity at year three. Thus, the negative influence of persistent depressive symptoms on physical activity decreased over time. Physical activity may not consistently decline with persistent depressive symptoms in adults with knee OA.
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Affiliation(s)
- Rhea Mehta
- University of Maryland, Baltimore, Baltimore, Maryland, United States
| | - Michelle Shardell
- University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Alice Ryan
- University of Maryland Baltimore, Baltimore, Maryland, United States
| | - Yu Dong
- University of Maryland, Baltimore, Baltimore, Maryland, United States
| | - Brock Beamer
- University of Maryland Baltimore, Baltimore, Maryland, United States
| | - Marc Hochberg
- University of Maryland, Baltimore, Baltimore, Maryland, United States
| | - Alan Rathbun
- University of Maryland, Baltimore, Baltimore, Maryland, United States
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10
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Dias JP, Carlson O, Schweitzer M, Shardell M, Clark JM, Brown TT, Egan JM, Lee CJ. GDF15 and Cortisol Response to Meal Tolerance Test in Post-Sleeve Gastrectomy Patients with Weight Regain. Obes Surg 2022; 32:2641-2648. [PMID: 35672598 PMCID: PMC9972254 DOI: 10.1007/s11695-022-06140-7] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 05/26/2022] [Accepted: 06/01/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND Hormonal factors behind weight regain (WR) after surgical weight loss remain inadequately understood. Growth/differentiation factor 15 (GDF15) has emerged as a potential therapeutic target in obesity treatment. Cortisol, another stress hormone, has also been associated with weight gain at both low and high circulating concentrations. We aimed to compare meal-stimulated GDF15 and cortisol response in adults with and without WR after sleeve gastrectomy (SG). We hypothesized that GDF15 and cortisol response to meal tolerance test (MTT) will be lower in those with versus without WR after SG. METHODS Cross-sectional study comprised 21 adults without diabetes, who underwent SG. WR was defined as 100 × (current weight - nadir)/(preoperative weight - nadir) > 10%. GDF15, cortisol, insulin, glucose, and incretins (total glucagon-like peptide (GLP)-1 and glucose-dependent insulinotropic polypeptide (GIP) circulating concentrations) were measured during MTT (0-240 min) after 3-6 years post-bariatric surgery. RESULTS All participants were 48% White, 85% female, with mean (SD) age: 43(10) years, and BMI: 36.2(7.6) kg/m2. Compared to the non-WR group (n = 6), the WR group (n = 15) had significantly higher BMI (WR: 38.6 ± 7.6 kg/m2, non-WR: 30.3 ± 3.5 kg/m2, p = 0.02) and showed lower GDF15 response (WR AUC vs non-WR AUC (116143 ± 13973 vs 185798 ± 38884 ng*min/L, p = 0.047)) and lower cortisol response (WR AUC vs non-WR AUC (3492 ± 210 vs 4880 ± 655 µg*min/dL, p = 0.015)). Incretin response did not differ between the groups. CONCLUSIONS GDF15 and cortisol responses to MTT were lower in those who regained the weight after SG compared to those who did not, suggesting that dysregulation in GDF15 and cortisol response following bariatric surgery.
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Affiliation(s)
- Jenny Pena Dias
- Department of Medicine, Johns Hopkins University School of Medicine, 1830 E. Monument St., Baltimore, MD, 21205, USA. .,National Institute of Aging, NIH, Baltimore, MD, USA.
| | - Olga Carlson
- National Institute of Aging, NIH, Baltimore, MD, USA
| | - Michael Schweitzer
- Department of Surgery, Johns Hopkins University School of Medicine, 1830 E. Monument St., Baltimore, MD 21205, USA
| | - Michelle Shardell
- Department of Epidemiology and Public Health, School of Medicine, University of Maryland, Baltimore, MD, USA
| | - Jeanne M. Clark
- Department of Medicine, Johns Hopkins University School of Medicine, 1830 E. Monument St., Baltimore, MD 21205, USA,Department of Epidemiology, Johns Hopkins University, Bloomberg School of Public Health, Baltimore, MD, USA
| | - Todd T. Brown
- Department of Medicine, Johns Hopkins University School of Medicine, 1830 E. Monument St., Baltimore, MD 21205, USA,Department of Epidemiology, Johns Hopkins University, Bloomberg School of Public Health, Baltimore, MD, USA
| | | | - Clare J. Lee
- Department of Medicine, Johns Hopkins University School of Medicine, 1830 E. Monument St., Baltimore, MD 21205, USA
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11
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Mehta R, Shardell M, Ryan A, Dong Y, Beamer B, Gallo J, Stuart E, Schuler M, Hochberg M, Rathbun A. POS1138 PERSISTENCY OF DEPRESSIVE SYMPTOMS AND PHYSICAL PERFORMANCE IN KNEE OSTEOARTHRITIS. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.5250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundKnee osteoarthritis (OA) is the most prevalent arthritic disorder, characterized by joint paint, which is exacerbated by chronic depressive episodes. Depression in knee OA is also associated with declines in physical activity level and greater disability; however, the impact of persistent depressive symptoms on physical performance remains unclear.ObjectivesTo determine how the persistence of depressive symptoms affects functional capacity in knee OA.MethodsParticipants (n=2,212) were from the Osteoarthritis Initiative cohort and included individuals with radiographic disease (Kellgren-Lawrence grade ≥ 2) and complete data on study measures at baseline. Depressive symptoms were assessed using the Center for Epidemiologic Studies Depression Scale (CES-D; range 0-60) at baseline and the first three follow-up visits. Physical Performance was measured using 20-meter gait speed (meters per second) during follow-up at the first four annual visits. Persistency of depressive symptoms was operationalized as a cumulative exposure using average severity over time. Gait speed was standardized so that outcome estimates could be interpreted in standard deviations. Time-invariant confounders measured at study enrollment included demographic, socioeconomic, and lifestyle factors. Time-varying confounders assessed concurrent to CES-D scores were body mass index, analgesic medications, pain, and other knee OA signs and symptoms. Marginal structural models accounting for time-dependent confounding and selective attrition were the primary method of analysis. The outcome model included all potential statistical interactions between depressive symptoms and follow-up time indicators. Post-estimation linear combinations estimated time-specific effects of time-averaged CES-D scores on standardized gait speed and differences in physical performance between participants with (i.e., CES-D=16) and without (i.e., CES-D=0) depressive symptoms satisfying screening criteria for major depression.ResultsThe interaction between depressive symptoms and time was statistically significant (P=<0.001). Time-specific associations indicated that the largest negative impact of depressive symptoms on physical performance was from baseline through year one (β = -0.0077; 95% CI: -0.0125, 0.0030). However, the effect of persistent depressive symptoms decreased over time and reversed in magnitude and directionality, evidenced by the time-specific associations between time-averaged CES-D scores from baseline through year one and year two and gait speed at year two (β = -0.0033; 95% CI: -0.0084, 0.0019) and year three (β = 0.0014; 95% CI: -0.0046, 0.0074), respectively. Consequently, the strongest negative affect of depressive symptoms on gait speed (β = -0.1232; 95% CI: -0.1998, -0.0473) between participants with and without depressive symptoms satisfying screening criteria for major depression was when depressive symptoms were first measured closest to the initial gait speed assessment.ConclusionIn the contrast to the dose-dependent relationship between chronic depressive episodes and pain in knee OA, study findings imply that the negative effect of depressive symptoms on physical performance decreases over time with increasing depression persistency. These results may reflect diminishing marginal effects, where the largest impact on physical performance in knee OA is during the first depressive episode closest to initial gait speed assessment, especially when averaged against improvement in symptoms over the same duration.AcknowledgementsThe OAI is a public-private partnership comprised of five contracts (N01-AR-2-2258; N01-AR-2-2259; N01-AR-2-2260; N01-AR-2-2261; N01-AR-2-2262) funded by the National Institutes of Health, a branch of the Department of Health and Human Services, and conducted by the OAI Study Investigators. Private funding partners include Merck Research Laboratories; Novartis Pharmaceuticals Corporation, GlaxoSmithKline; and Pfizer, Inc. Private sector funding for the OAI is managed by the Foundation for the National Institutes of Health. This manuscript was prepared using an OAI public use data set and does not necessarily reflect the opinions or views of the OAI investigators, the NIH, or the private funding partners.Disclosure of InterestsRhea Mehta: None declared, Michelle Shardell: None declared, Alice Ryan: None declared, Yu Dong: None declared, Brock Beamer: None declared, Joseph Gallo: None declared, Elizabeth Stuart: None declared, Megan Schuler: None declared, Marc Hochberg Shareholder of: Dr. Marc C. Hochberg is the President of Rheumcon Corporation., Consultant of: Dr. Marc C. Hochberg receives consulting fees from Bioiberica SA, Bristol-Myers Squibb, Eli Lilly, EMD Serono, Galapagos, IBSA Biotechniq SA, Novartis Pharma AG, Pfizer, Plexxikon, Samumed LLC, Theralogix LLC, and TissueGene Inc., Alan Rathbun: None declared
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12
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Shardell M, Speiser JL. Waste Not, Want Not: Proper Design, Analysis, and Interpretation Are Essential to Advancing Aging Research Across the Translational Science Spectrum. J Gerontol A Biol Sci Med Sci 2022; 77:2165-2167. [PMID: 35588371 PMCID: PMC9678189 DOI: 10.1093/gerona/glac036] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Michelle Shardell
- Address correspondence to: Michelle Shardell, PhD, Department of Epidemiology and Public Health, Institute for Genome Sciences, 670 W Baltimore Street, Baltimore, MD 21201, USA. E-mail:
| | - Jaime Lynn Speiser
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
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13
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Kuo PL, Levine M, Schrack J, Shardell M, Ferrucci L. Longitudinal Profiling in Phenotypic Metric of Aging: Insights From the Baltimore Longitudinal Study of Aging. Innov Aging 2021. [PMCID: PMC8679223 DOI: 10.1093/geroni/igab046.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
It remains challenging to quantify the pace of aging across lifespan due to lack of comprehensive longitudinal measurements across wide range of age. In Baltimore Longitudinal Study of Aging, we have measured the longitudinal trajectories of more than 30 phenotypes across four pre-identified domain - body composition, energy regulation, homeostatic mechanisms and neurodegeneration/neuroplasticity, among participants with age between 20+ and 90+. We implemented a two-stage approach to summarize the longitudinal trajectories of these phenotypes across four domains into a summarized score. We demonstrated that higher summarized score (denoting for slower longitudinal phenotypic decline) is associated with slower decline in both cognitive and physical functions, across different stages of adulthood. Our results imply that deep longitudinal profiling contains rich information and may potentially replace diseases as an early endpoint in trials targeting at aging. Further, understanding the underpinning of longitudinal phenotypic trajectories may provide clues to the biological mechanisms of aging.
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Affiliation(s)
- Pei-Lun Kuo
- National Institute on Aging, National Institute on Aging, Maryland, United States
| | - Morgan Levine
- Yale University, New Haven, Connecticut, United States
| | - Jennifer Schrack
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States
| | - Michelle Shardell
- University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Luigi Ferrucci
- National Institute on Aging, Baltimore, Maryland, United States
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14
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Simonsick E, Moore A, Shardell M, Kuo PL, Karikkineth A, Ferrucci L. Fatigability: An Early Marker of Diminished Renal Function? Innov Aging 2021. [PMCID: PMC8681911 DOI: 10.1093/geroni/igab046.797] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Renal function declines markedly with age due to normal aging and/or disease processes and impacts multiple systems. Diminished renal function may manifest as low exercise tolerance and fatigue threshold. Using data on 951 well-functioning (usual gait speed >.67m/s and no difficulty walking ¼ mile) men and women (51%) aged 60-89 years in the Baltimore Longitudinal Study of Aging, we evaluated the cross-sectional association between perceived fatigability (Rating Perceived Exertion after 5-minute treadmill walk at 1.5mph) categorized as 6-7, 8-9, 10-11 and 12+ and GFR using Cockcroft-Gault. For each fatigability increment, likelihood of suboptimal (GFR=75-89, 21%), diminished (GFR=60-74, 26%) and poor renal function (GFR=15-59, 30%) relative to GFR≥90 was respectively OR(95%CI)p-value 1.51(1.16-1.96).002, 1.38(1.04-1.83).027 and 1.68(1.22-2.31).002 adjusted for demographics, weight, height, smoking, exercise and anemia. Findings were similar for men and women. Perceived fatigability may facilitate identification of apparently well-functioning older adults on the precipice of suboptimal to poor renal function.
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Affiliation(s)
| | - Ann Moore
- National Institute on Aging, Baltimore, Maryland, United States
| | - Michelle Shardell
- University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Pei-Lun Kuo
- National Institute on Aging, National Institute on Aging, Maryland, United States
| | | | - Luigi Ferrucci
- National Institute on Aging, Baltimore, Maryland, United States
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15
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Bajracharya R, Guralnik J, Magaziner J, Shardell M, Rathbun A, Yamashita T, Orwig D. Sex Difference in All-Cause and Infection-Specific Mortality Over 10 Years Post Hip Fracture. Innov Aging 2021. [PMCID: PMC8969615 DOI: 10.1093/geroni/igab046.627] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Men die at a twice higher rate than women in the first two years after fracture and also experience higher infection-related mortality. Most research has only looked at differences in short-term mortality after hip fracture. The objective was to determine if cumulative incidence of all-cause mortality and infection-specific mortality is higher in men compared to women over ten years. Data came from Baltimore Hip Studies7th cohort. Women were frequency-matched (1:1) to men on timing of fracture to ensure equal numbers of men and women. The association of sex and all-cause mortality was analyzed using Cox proportional hazard model and a cause-specific hazard model for infection-specific mortality. Both models controlled for age, cognition, comorbidity, depressive symptoms, BMI, and pre-fracture ADL limitations. Complete-case sample size was 300 (men=145, women=155). By the end of ten years from the date of admission for a hip fracture, there were 237 (men=132, women=105) all-cause deaths and 38 (men=25, women=13) infection-specific deaths. Men had significantly higher all-cause mortality risk [73.7% vs 59.3%; HR=2.31(2.02-2.59)] and infection-specific mortality [17.2% vs 8.3%; HR=4.43(2.07-9.51)] compared to women. In addition to sex, older age, cognition, and comorbidities were associated with all-cause mortality whereas only BMI was associated with infection-specific mortality in adjusted models. Men had a higher risk of mortality over 10 years compared to women, specifically two-fold higher risk of infection-specific mortality compared to all-cause mortality. Findings imply that interventions to prevent/treat infection, tailored by sex, may be needed to narrow significant differences in long-term mortality rates between men and women.
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Affiliation(s)
- Rashmita Bajracharya
- University of Maryland, School of Medicine, Catonsville, Maryland, United States
| | - Jack Guralnik
- University of Maryland, Baltimore, Baltimore, Maryland, United States
| | - Jay Magaziner
- University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Michelle Shardell
- University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Alan Rathbun
- University of Maryland Baltimore, Baltimore, Maryland, United States
| | - Takashi Yamashita
- University of Maryland, Baltimore County, Baltimore, Maryland, United States
| | - Denise Orwig
- University of Maryland, Baltimore, Baltimore, Maryland, United States
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16
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Shardell M, Guralnik J, Simonsick E, Kritchevsky S, Cawthon P. Sex-Specific 25-Hydroxyvitamin D Threshold Concentrations for Functional Outcomes in Older Adults. Innov Aging 2021. [PMCID: PMC8970217 DOI: 10.1093/geroni/igab046.1814] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
25-Hydroxyvitamin D [25(OH)D] has extra-skeletal effects, but it is not known whether the minimum sufficient serum levels for such targets, like muscle, differ from those for bone health (typically recommended at 20 or 30 ng/dL). Therefore, we derived and validated sex-specific thresholds for serum 25(OH)D predictive of poor physical function using 5 cohorts comprising 16,388 community-dwelling older adults (60.9% women). Using a cohort-stratified random two-thirds sample, we found incident slow gait was best discriminated by 25(OH)D<24.0 versus 25(OH)D>=24.0 ng/mL among women (Relative Risk=1.29; 95% CI 1.10-1.50) and 25(OH)D<21.0 versus 25(OH)D >=21.0 ng/mL among men (RR=1.43; 95% CI 1.01-2.02). Estimates from the remaining one-third validation sample were similar. Empirically identified and validated sex-specific 25(OH)D thresholds from multiple well-characterized cohorts of older adults may yield more biologically meaningful definitions in important sub-populations. Such thresholds may serve as candidate reference concentrations or inform design of vitamin D intervention trials in older adults.
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Affiliation(s)
- Michelle Shardell
- University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Jack Guralnik
- University of Maryland, Baltimore, Baltimore, Maryland, United States
| | | | - Stephen Kritchevsky
- Wake Forest School of Medicine, Winston Salem, North Carolina, United States
| | - Peggy Cawthon
- California Pacific Medical Center, San Francisco, California, United States
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17
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Orwig DL, Abraham DS, Hochberg MC, Gruber-Baldini A, Guralnik JM, Cappola AR, Golden J, Hicks GE, Miller RR, Resnick B, Shardell M, Sterling RS, Bajracharya R, Magaziner J. Sex Differences in Recovery Across Multiple Domains Among Older Adults With Hip Fracture. J Gerontol A Biol Sci Med Sci 2021; 77:1463-1471. [PMID: 34555162 PMCID: PMC9255694 DOI: 10.1093/gerona/glab271] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 05/11/2021] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Hip fractures are a public health problem among older adults, but most research on recovery after hip fracture has been limited to females. With growing numbers of hip fractures among males, it is important to determine how recovery outcomes may differ between the sexes. METHODS 168 males and 171 females were enrolled within 15 days of hospitalization with follow-up visits at 2, 6, and 12 months postadmission to assess changes in disability, physical performance, cognition, depressive symptoms, body composition, and strength, and all-cause mortality. Generalized estimating equations examined whether males and females followed identical outcome recovery assessed by the change in each outcome. RESULTS The mean age at fracture was similar for males (80.4) and females (81.4), and males had more comorbidities (2.5 vs 1.6) than females. Males were significantly more likely to die over 12 months (hazard ratio 2.89, 95% confidence interval: 1.56-5.34). Changes in outcomes were significantly different between males and females for disability, gait speed, and depressive symptoms (p < .05). Both sexes improved from baseline to 6 months for these measures, but only males continued to improve between 6 and 12 months. There were baseline differences for most body composition measures and strength; however, there were no significant differences in change by sex. CONCLUSIONS Findings confirm that males have higher mortality but suggest that male survivors have continued functional recovery over the 12 months compared to females. Research is needed to determine the underlying causes of these sex differences for developing future prognostic information and rehabilitative interventions.
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Affiliation(s)
- Denise L Orwig
- Address correspondence to: Denise L. Orwig, PhD, Department of Epidemiology and Public Health, University of Maryland School of Medicine, 660 West Redwood Street, Suite 200, Baltimore, MD 21201, USA. E-mail:
| | - Danielle S Abraham
- Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, USA
| | - Marc C Hochberg
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, USA
| | - Ann Gruber-Baldini
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, USA
| | - Jack M Guralnik
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, USA
| | - Anne R Cappola
- Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, USA
| | - Justine Golden
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, USA
| | - Gregory E Hicks
- Department of Physical Therapy, University of Delaware, Newark, USA
| | - Ram R Miller
- Novartis Institutes for BioMedical Research, Cambridge, Massachusetts, USA
| | - Barbara Resnick
- Department of Organizational Systems and Adult Health, University of Maryland School of Nursing, Baltimore, USA
| | - Michelle Shardell
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, USA
| | - Robert S Sterling
- Department of Orthopedics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Rashmita Bajracharya
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, USA
| | - Jay Magaziner
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, USA
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18
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Cawthon PM, Patel SM, Kritchevsky SB, Newman AB, Santanasto A, Kiel DP, Travison TG, Lane N, Cummings SR, Orwoll ES, Kwok T, Hirani V, Schousboe J, Karlsson MK, Mellström D, Ohlsson C, Ljunggren Ö, Xue QL, Shardell M, Jordan JM, Pencina KM, Fielding RA, Magaziner J, Correa-de-Araujo R, Bhasin S, Manini TM. What cut-point in gait speed best discriminates community dwelling older adults with mobility complaints from those without? A pooled analysis from the Sarcopenia Definitions and Outcomes Consortium. J Gerontol A Biol Sci Med Sci 2021; 76:e321-e327. [PMID: 34166490 DOI: 10.1093/gerona/glab183] [Citation(s) in RCA: 6] [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: 01/25/2021] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Cut-points to define slow walking speed have largely been derived from expert opinion. METHODS Study participants (13,589 men and 5,043 women aged ≥65years) had walking speed (m/s) measured over 4-6 meters (mean ± SD: 1.20 ± 0.27 m/s in men and 0.94 ± 0.24 m/s in women.) Mobility limitation was defined as self-reported any difficulty with walking ~1/4 mile (prevalence: 12.6% men, 26.4% women). Sex-stratified classification and regression tree (CART) models with 10-fold cross-validation identified walking speed cut-points that optimally discriminated those who reported mobility limitation from those who did not. RESULTS Among 5,043 women, CART analysis identified two cut-points, classifying 4,144 (82.2%) with walking speed ≥0.75 m/s, which we labeled as "fast"; 478 (9.5%) as "intermediate" (walking speed ≥0.62 m/s but <0.75 m/s); and 421 (8.3%) as "slow" (walking speed <0.62 m/s). Among 13,589 men, CART analysis identified three cut-points, classifying 10,001 (73.6%) with walking speed ≥1.00 m/s ("very fast"); 2,901 (21.3%) as "fast" (walking speed ≥0.74 m/s but <1.00 m/s); 497 (3.7%) as "intermediate" (walking speed ≥0.57 m/s but <0.74 m/s); and 190 (1.4%) as "slow" (walking speed <0.57 m/s). Prevalence of self-reported mobility limitation was lowest in the "fast" or "very fast" (11% for men and 19% for women) and highest in the "slow" (60.5% in men and 71.0% in women). Rounding the two slower cut-points to 0.60 m/s and 0.75 m/s reclassified very few participants. CONCLUSIONS Cut-points in walking speed of ~0.60 m/s and 0.75 m/s discriminate those with self-reported mobility limitation from those without.
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Affiliation(s)
- Peggy M Cawthon
- Research Institute, California Pacific Medical Center, San Francisco, CA.,Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA
| | - Sheena M Patel
- Research Institute, California Pacific Medical Center, San Francisco, CA
| | - Stephen B Kritchevsky
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Wake Forest School of Medicine, Winston-Salem, NC
| | - Anne B Newman
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA
| | - Adam Santanasto
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA
| | - Douglas P Kiel
- Marcus Institute for Aging Research, Hebrew SeniorLife, Department of Medicine Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA
| | - Thomas G Travison
- Marcus Institute for Aging Research, Hebrew SeniorLife, Department of Medicine Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA
| | - Nancy Lane
- Center for Musculoskeletal Health and Department of Internal Medicine, University of California Medical Center, Sacramento, CA
| | - Steven R Cummings
- Research Institute, California Pacific Medical Center, San Francisco, CA.,Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA
| | - Eric S Orwoll
- Bone and Mineral Unit, Oregon Health & Science University, Portland
| | - Timothy Kwok
- Department of Medicine & Therapeutics and School of Public Health, Faculty of Medicine, The Chinese University of Hong Kong
| | - Vasant Hirani
- Charles Perkins Centre, University of Sydney, Sydney, Australia
| | - John Schousboe
- HealthPartners Institute, Bloomington, Minnesota and Division of Health Policy and Management, University of Minnesota, Minneapolis
| | - Magnus K Karlsson
- Clinical and Molecular Osteoporosis Research Unit, Department of Orthopedics and Clinical Sciences in Malmo, Skane University Hospital, Lund University, Malmo, Sweden
| | - Dan Mellström
- Centre for Bone and Arthritis Research, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Drug Treatment, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
| | - Claes Ohlsson
- Centre for Bone and Arthritis Research, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Drug Treatment, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
| | - Östen Ljunggren
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Qian-Li Xue
- Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Johns Hopkins Medical Institute, Baltimore, MD
| | - Michelle Shardell
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
| | - Joanne M Jordan
- Thurston Arthritis Research Center, School of Medicine, University of North Carolina, Chapel Hill, NC
| | - Karol M Pencina
- Marcus Institute for Aging Research, Hebrew SeniorLife, Department of Medicine Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA
| | - Roger A Fielding
- Nutrition, Exercise, Physiology, and Sarcopenia Laboratory, Jean Mayer U.S. Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts
| | - Jay Magaziner
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
| | | | - Shalender Bhasin
- Boston Claude D. Pepper Older Americans Independence Center, Brigham and Women's Hospital, Harvard Medical School, 221 Longwood Avenue, Boston, MA
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Roghmann MC, Lydecker AD, Shardell M, DeBoy RT, Johnson JK, Zhao L, Hittle LL, Mongodin EF. Effect of mupirocin for Staphylococcus aureus decolonization on the microbiome of the nose and throat in community and nursing home dwelling adults. PLoS One 2021; 16:e0252004. [PMID: 34101737 PMCID: PMC8186807 DOI: 10.1371/journal.pone.0252004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 04/28/2021] [Indexed: 12/26/2022] Open
Abstract
Objective To characterize the microbial communities of the anterior nares (nose) and posterior pharynx (throat) of adults dwelling in the community and in nursing homes before and after treatment with intranasal mupirocin. Methods Staphylococcus aureus-colonized adults were recruited from the community (n = 25) and from nursing homes (n = 7). S. aureus colonization was confirmed using cultures. Participants had specimens taken from nose and throat for S. aureus quantitation using quantitative PCR for the nuc gene and bacterial profiling using 16S rRNA gene sequencing over 12 weeks. After two baseline study visits 4 weeks apart, participants received intranasal mupirocin for 5 days with 3 further visits over a 8 week follow-up period. Results We found a decrease in the absolute abundance of S. aureus in the nose for 8 weeks after mupirocin (1693 vs 141 fg/ul, p = 0.047). Mupirocin caused a statistically significant disruption in bacterial communities of the nose and throat after 1 week, which was no longer detected after 8 weeks. Bacterial community profiling demonstrated that there was a decrease in the relative abundance of S. aureus (8% vs 0.3%, p<0.01) 8 weeks after mupirocin and a transient decrease in the relative abundance of Staphylococcus epidermidis in the nose (21% vs 5%, p<0.01) 1 week after mupirocin. Conclusions Decolonization with mupirocin leads to a sustained effect on absolute and relative abundance of S. aureus but not for other bacteria in the nose. This demonstrates that a short course of mupirocin selectively decreases S. aureus in the nose for up to 8 weeks.
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Affiliation(s)
- Mary-Claire Roghmann
- Geriatrics Research Education and Clinical Center, VA Maryland Health Care System, Baltimore, Maryland, United States of America
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- * E-mail:
| | - Alison D. Lydecker
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Michelle Shardell
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- Department of Microbiology and Immunology and Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Robert T. DeBoy
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - J. Kristie Johnson
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - LiCheng Zhao
- Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Lauren L. Hittle
- Department of Microbiology and Immunology and Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Emmanuel F. Mongodin
- Department of Microbiology and Immunology and Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
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20
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Shardell M, Gravitt PE, Burke AE, Ravel J, Brotman RM. Association of Vaginal Microbiota with Signs and Symptoms of the Genitourinary Syndrome of Menopause across Reproductive Stages. J Gerontol A Biol Sci Med Sci 2021; 76:1542-1550. [PMID: 33903897 DOI: 10.1093/gerona/glab120] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [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: 10/01/2020] [Indexed: 02/07/2023] Open
Abstract
The genitourinary syndrome of menopause (GSM) describes signs and symptoms resulting from effects of estrogen deficiency on the female genitourinary tract, including the vagina, labia, urethra, and bladder. Signs/symptoms associated with GSM may occur during any reproductive stage from multiple etiologies but are most common during menopause due to low estrogen. Vaginal microbiota, particularly Lactobacillus spp., are beneficial to the female genital tract; however, their abundance declines during menopause. We aimed to longitudinally assess vaginal microbiota characterized by 16S rRNA gene amplicon sequencing and GSM-associated endpoints across reproductive stages. In a two-year cohort study of 750 women aged 35-60 years at enrollment and 2,111 semiannual person-visits, low-Lactobacillus vaginal microbiota communities were observed at 21.2% (169/798), 22.9% (137/597), and 49.7% (356/716) of person-visits among pre-, peri-, and postmenopausal women, respectively (p<.001). Compared to communities that have high Gardnerella vaginalis relative abundance and diverse anaerobes, the following communities were associated with a lower covariate-adjusted odds of vaginal atrophy: L. crispatus-dominated communities among postmenopausal women (odds ratio[OR]=0.25; 95% confidence interval[CI], 0.08, 0.81), L. gasseri/L. jensenii (OR=0.21; 95%CI, 0.05, 0.94) and L. iners (OR=0.21; 95%CI, 0.05, 0.85) among perimenopausal women, and L. iners-dominated communities (OR=0.18; 95%CI, 0.04, 0.76) among premenopausal women. Postmenopausal women with L. gasseri/L. jensenii-dominated communities had the lowest odds of vaginal dryness (OR=0.36; 95%CI, 0.12, 1.06) and low libido (OR=0.28; 95%CI, 0.10, 0.74). Findings for urinary incontinence were inconsistent. Associations of vaginal microbiota with GSM signs/symptoms are most evident after menopause, suggesting an avenue for treatment and prevention.
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Affiliation(s)
- Michelle Shardell
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland.,Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
| | - Patti E Gravitt
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
| | - Anne E Burke
- Department of Gynecology and Obstetrics, Johns Hopkins Medical Institutions, Baltimore, Maryland.,Department of Population, Family, and Reproductive Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Jacques Ravel
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland.,Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland
| | - Rebecca M Brotman
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland.,Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
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21
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Shardell M, Cappola AR, Guralnik JM, Hicks GE, Kritchevsky SB, Simonsick EM, Ferrucci L, Semba RD, Shaffer NC, Harris T, Eiriksdottir G, Gudnason V, Cotch MF, Orwoll E, Ensrud KE, Cawthon PM. Sex-specific 25-hydroxyvitamin D threshold concentrations for functional outcomes in older adults: PRoject on Optimal VItamin D in Older adults (PROVIDO). Am J Clin Nutr 2021; 114:16-28. [PMID: 33826696 PMCID: PMC8246604 DOI: 10.1093/ajcn/nqab025] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 08/10/2020] [Accepted: 01/26/2021] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Threshold serum 25-hydroxyvitamin D [25(OH)D] concentrations for extraskeletal outcomes are uncertain and could differ from recommendations (20-30 ng/mL) for skeletal health. OBJECTIVES We aimed to identify and validate sex-specific threshold 25(OH)D concentrations for older adults' physical function. METHODS Using 5 large prospective, population-based studies-Age, Gene/Environment Susceptibility-Reykjavik (n = 4858, Iceland); Health, Aging, and Body Composition (n = 2494, United States); Invecchiare in Chianti (n = 873, Italy); Osteoporotic Fractures in Men (n = 2301, United States); and Study of Osteoporotic Fractures (n = 5862, United States)-we assessed 16,388 community-dwelling adults (10,376 women, 6012 men) aged ≥65 y. We analyzed 25(OH)D concentrations with the primary outcome (incident slow gait: women <0.8 m/s; men <0.825 m/s) and secondary outcomes (gait speed, incident self-reported mobility, and stair climb impairment) at median 3.0-y follow-up. We identified sex-specific 25(OH)D thresholds that best discriminated incident slow gait using machine learning in training data (2/3 cohort-stratified random sample) and validated using the remaining (validation) data and secondary outcomes. RESULTS Mean age in the cohorts ranged from 74.4 to 76.5 y in women and from 73.3 to 76.6 y in men. Overall, 1112/6123 women (18.2%) and 494/3937 men (12.5%) experienced incident slow gait, 1098/7011 women (15.7%) and 474/3962 men (12.0%) experienced incident mobility impairment, and 1044/6941 women (15.0%) and 432/3993 men (10.8%) experienced incident stair climb impairment. Slow gait was best discriminated by 25(OH)D <24.0 ng/mL compared with 25(OH)D ≥24.0 ng/mL in women (RR: 1.29; 95% CI: 1.10, 1.50) and 25(OH)D <21.0 ng/mL compared with 25(OH)D ≥21.0 ng/mL in men (RR: 1.43; 95% CI: 1.01, 2.02). Most associations between 25(OH)D and secondary outcomes were modest; estimates were similar between validation and training datasets. CONCLUSIONS Empirically identified and validated sex-specific threshold 25(OH)D concentrations for physical function for older adults, 24.0 ng/mL for women and 21.0 ng/mL for men, may inform candidate reference concentrations or the design of vitamin D intervention trials.
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Affiliation(s)
| | - Anne R Cappola
- University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | - Jack M Guralnik
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Gregory E Hicks
- Department of Physical Therapy, University of Delaware, Newark, DE, USA
| | - Stephen B Kritchevsky
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | | | | | - Richard D Semba
- Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | | | | | | | - Mary Frances Cotch
- National Eye Institute, Intramural Research Program, Division of Epidemiology and Clinical Applications, Bethesda, MD, USA
| | - Eric Orwoll
- Oregon Health & Science University, Portland, OR, USA
| | - Kristine E Ensrud
- University of Minnesota Department of Medicine and Division of Epidemiology, Minneapolis, MN, USA
| | - Peggy M Cawthon
- California Pacific Medical Center Research Institute, San Francisco, CA, USA
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22
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Shardell M, Gravitt P, Ravel J, Burke A, Brotman R. Association of Vaginal Microbiota With the Genitourinary Syndrome of Menopause Across Reproductive Stages. Innov Aging 2020. [PMCID: PMC7740608 DOI: 10.1093/geroni/igaa057.554] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The genitourinary syndrome of menopause (GSM) is a collection of signs and symptoms related to estrogen decline that involves physical changes to the vulva, vagina, and lower urinary tract. GSM signs and symptoms may occur during any reproductive stage but are most common during menopause. Vaginal microbiota, particularly Lactobacillus spp., protect the female genital tract from multiple conditions; however, Lactobacillus spp. abundance declines during menopause. We aimed to determine the longitudinal association of vaginal microbiota with GSM signs and symptoms across reproductive stages. In a two-year cohort study comprising 750 women aged 35-60 years who contributed 2111 semiannual person-visits, low-Lactobacillus spp. vaginal microbiota communities were observed at 21.2% (169/798), 22.9% (137/597), and 49.7% (356/716) of person-visits among pre-, peri-, and post-menopausal women, respectively (p<.001). After covariate adjustment, low-Lactobacillus spp. communities characterized by high Atopobium and Megasphaera relative abundance were associated with vulvovaginal atrophy relative to high-Lactobacillus spp. communities dominated by L. crispatus (OR[Odds Ratio]=3.04, 95% Confidence Interval[CI]=1.02-9.06) among post-menopausal, but not among peri- or pre-menopausal women. Also, post-menopausal women with low-Lactobacillus spp. communities reported decreased libido (OR=1.79, 95%CI=1.04-3.12) and vaginal dryness (OR=1.61, 95%CI=0.89-2.90) more frequently than their counterparts with high-Lactobacillus spp. communities, but not among peri- or pre-menopausal women (p for interaction<.05). Specifically, low-Lactobacillus spp. communities characterized by high Atopobium and Megasphaera relative abundance were related to both decreased libido (OR=2.82, 95%CI=1.11-7.14) and vaginal dryness (OR=3.50, 95%CI=1.18-10.44) compared with high-Lactobacillus spp. communities dominated by L. gasseri/L. jensenii. Vaginal microbiota, particularly Lactobacillus spp., and menopause may synergistically influence GSM.
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Affiliation(s)
- Michelle Shardell
- University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Patti Gravitt
- University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Jacques Ravel
- University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Anne Burke
- Johns Hopkins Medical Institutions, Baltimore, Maryland, United States
| | - Rebecca Brotman
- University of Maryland School of Medicine, Baltimore, Maryland, United States
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23
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Shardell M, Parimi N, Langsetmo L, Orwoll E, Shikany J, Kado D, Cawthon P. Comparing Analytical Methods for Gut Microbiome and Aging: Gut Microbiota and Body Weight in the MrOS. Innov Aging 2020. [PMCID: PMC7743514 DOI: 10.1093/geroni/igaa057.3074] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Gut microbiome datasets comprise microbial taxa relative abundances that necessarily sum to 1; analysis ignoring this feature may produce misleading results. We assessed 163 genera from the first batch of Microbiome Ancillary Study (n=530) stool samples and examined associations between microbiota and body weight. We compared conventional Bayesian linear regression (BLR) and network analysis to their compositional counterparts, adjusting for past weight and other covariates. Conventional BLR identified Roseburia and Dialister (positive association) and Coprococcus-1 (negative association) after multiple comparisons adjustment(P<.0125). No conventional network module was associated with weight. Using compositional BLR, men with higher Coprococcus-2 and Acidaminococcus had higher weight, whereas men with higher Coprococcus-1 and Ruminococcus-1 had lower weight (P<.05), but findings were non-significant after multiple comparisons adjustment. Two compositional network modules with respective hub taxa Blautia and Faecalibacterium were associated with weight(P<.01). Findings depended on analytical workflow; compositional analysis is advocated to appropriately handle the sum-to-1 constraint.
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Affiliation(s)
- Michelle Shardell
- University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Neeta Parimi
- California Pacific Medical Center, San Francisco, California, United States
| | - Lisa Langsetmo
- University of Minnesota, Minneapolis, Minnesota, United States
| | - Eric Orwoll
- Oregon Health & Science University, Portland, Oregon, United States
| | - James Shikany
- University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Deborah Kado
- University of California, San Diego, La Jolla, California, United States
| | - Peggy Cawthon
- California Pacific Medical Center, San Francisco, California, United States
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24
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Kapogiannis D, Eren E, Hunt JF, Shardell M, Vogt NM, Johnson SC, Bendlin BB, Nogueras‐Ortiz C, Delgado‐Peraza F, Eitan E. Plasma extracellular vesicles of neuronal and astrocytic origins: Biomarker carriers and pathogenic effectors in Alzheimer’s disease. Alzheimers Dement 2020. [DOI: 10.1002/alz.037317] [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] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dimitrios Kapogiannis
- National Institute on Aging/National Institutes of Health (NIA/NIH) Baltimore MD USA
| | | | - Jack F.V. Hunt
- Wisconsin Alzheimer’s Disease Research Center University of Wisconsin School of Medicine and Public Health Madison WI USA
| | | | | | - Sterling C. Johnson
- VA Geriatric Research Education and Clinical Center (GRECC) William S. Middleton Memorial Veterans Hospital Madison WI USA
| | - Barbara B. Bendlin
- University of Wisconsin School of Medicine and Public Health Madison WI USA
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25
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Dias JP, Joseph JJ, Kluwe B, Zhao S, Shardell M, Seeman T, Needham BL, Wand GS, Kline D, Brock G, Castro-Diehl C, Golden SH. The longitudinal association of changes in diurnal cortisol features with fasting glucose: MESA. Psychoneuroendocrinology 2020; 119:104698. [PMID: 32674946 PMCID: PMC8046490 DOI: 10.1016/j.psyneuen.2020.104698] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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: 12/31/2019] [Revised: 03/26/2020] [Accepted: 04/21/2020] [Indexed: 12/15/2022]
Abstract
Little is known about the longitudinal association between fasting glucose (FG) and the diurnal cortisol profile among those with normal fasting glucose (NFG), impaired fasting glucose (IFG) and diabetes. To assess the temporality of the relationship between cortisol and glucose, we examined the association of: A) change (Δ) in diurnal cortisol curve features with ΔFG; B) prior annual percent change in FG with diurnal cortisol curve features; and C) baseline cortisol curve features with ΔFG over 6 years among participants with NFG, IFG and diabetes in the Multi-Ethnic Study of Atherosclerosis. The main outcome measures were: A) 6-year ΔFG (n = 512); B) diurnal cortisol curve features (wake-up cortisol levels, cortisol awakening response, total area under the curve, overall decline slope and bedtime cortisol) (n = 1275); and C) 6-year ΔFG (n = 700). After full multivariable adjustment among participants with diabetes, each annual percent change increase in wake-up cortisol, total area under the curve (AUC), and overall decline slope was associated with a significant increase in FG over 6 years in all models (all p < 0.05). A 1% prior annual increase in FG was associated with a 2.8 % lower (-2.8 %; 95 % CI: -5.3 % to -0.4 %) bedtime cortisol among participants with NFG at baseline. A 1 % flatter overall decline slope was associated with a 0.19 % increase in subsequent annual % change in FG over 6 years among participants with diabetes. Among participants with diabetes there was a positive association of change in wake-up cortisol, total AUC and overall decline slope with change in FG. Baseline overall decline slope was positively associated with change in FG among the baseline diabetes group. These results suggest a detrimental role of cortisol contributing to glycemia among individuals with diabetes.
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Affiliation(s)
- Jenny Pena Dias
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Joshua J. Joseph
- Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States,Corresponding author at: Department of Internal Medicine, The Ohio State University Wexner Medical Center, 579 McCampbell Hall, 1581 Dodd Drive, Columbus, OH 43210, United States. (J.J. Joseph)
| | - Bjorn Kluwe
- Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Songzhu Zhao
- Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States,Department of Biomedical Informatics, Center for Biostatistics, The Ohio State University College of Medicine
| | - Michelle Shardell
- Institute for Genome Sciences, Department of Epidemiology and Public Health, University of Maryland School of Medicine,National Institute on Aging, NIH, Baltimore, MD, United States
| | - Teresa Seeman
- Division of Geriatrics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Belinda L. Needham
- Department of Epidemiology, University of Michigan, Ann Arbor, MI, United States
| | - Gary S. Wand
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - David Kline
- Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States,Department of Biomedical Informatics, Center for Biostatistics, The Ohio State University College of Medicine
| | - Guy Brock
- Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States,Department of Biomedical Informatics, Center for Biostatistics, The Ohio State University College of Medicine
| | - Cecilia Castro-Diehl
- Section of Preventive Medicine and Epidemiology, Boston University, Boston, MA, United States
| | - Sherita Hill Golden
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States
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26
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Semba RD, Gonzalez-Freire M, Tanaka T, Biancotto A, Zhang P, Shardell M, Moaddel R, Ferrucci L. Elevated Plasma Growth and Differentiation Factor 15 Is Associated With Slower Gait Speed and Lower Physical Performance in Healthy Community-Dwelling Adults. J Gerontol A Biol Sci Med Sci 2020; 75:175-180. [PMID: 30874790 DOI: 10.1093/gerona/glz071] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [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: 06/23/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Growth and differentiation factor 15 (GDF-15) has been associated with obesity, muscle wasting, and cachexia. The receptor for GDF-15 was recently identified in the brainstem and regulates food intake and metabolism. The relationship of plasma GDF-15 with the age-associated decline of muscle mass and strength, gait speed, and physical performance in adults has not been well characterized. METHODS Plasma GDF-15, grip strength, 6-m gait speed, 400-m walking test time, lower extremity physical performance score, appendicular lean mass, and fat mass were measured in 194 healthy adult participants, aged 22-93 years, of the Baltimore Longitudinal Study of Aging. RESULTS Plasma GDF-15 concentrations increased with age (p < .001) and were higher in whites compared with blacks and Asians (p = .04). Adults with higher plasma GDF-15 had slower 6-m gait speed, longer 400-m walking time, and lower physical performance score in multivariable analyses adjusting for age and race. Plasma GDF-15 was not associated with grip strength, appendicular lean mass, or fat mass. CONCLUSIONS Elevated plasma GDF-15 is associated with slower gait speed, higher 400-m walking time, and lower physical performance in very healthy community-dwelling adults. The relationship between plasma GDF-15 and sarcopenia-related outcomes may be stronger in the population not selected to be healthy, and this hypothesis should be tested in a representative population.
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Affiliation(s)
- Richard D Semba
- Wilmer Eye Institute, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | | | - Toshiko Tanaka
- National Institute on Aging, National Institutes of Health, Baltimore
| | - Angelique Biancotto
- Trans-NIH Center for Human Immunology, Autoimmunity, and Inflammation, National Institutes of Health, Bethesda, Maryland
| | - Pingbo Zhang
- Wilmer Eye Institute, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Michelle Shardell
- National Institute on Aging, National Institutes of Health, Baltimore
| | - Ruin Moaddel
- National Institute on Aging, National Institutes of Health, Baltimore
| | | | - Luigi Ferrucci
- National Institute on Aging, National Institutes of Health, Baltimore
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27
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Cawthon PM, Manini T, Patel SM, Newman A, Travison T, Kiel DP, Santanasto AJ, Ensrud KE, Xue QL, Shardell M, Duchowny K, Erlandson KM, Pencina KM, Fielding RA, Magaziner J, Kwok T, Karlsson M, Ohlsson C, Mellström D, Hirani V, Ribom E, Correa-de-Araujo R, Bhasin S. Putative Cut-Points in Sarcopenia Components and Incident Adverse Health Outcomes: An SDOC Analysis. J Am Geriatr Soc 2020; 68:1429-1437. [PMID: 32633824 PMCID: PMC7508260 DOI: 10.1111/jgs.16517] [Citation(s) in RCA: 117] [Impact Index Per Article: 29.3] [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: 10/23/2019] [Revised: 02/24/2020] [Accepted: 04/05/2020] [Indexed: 01/06/2023]
Abstract
OBJECTIVES Analyses performed by the Sarcopenia Definitions and Outcomes Consortium (SDOC) identified cut-points in several metrics of grip strength for consideration in a definition of sarcopenia. We describe the associations between the SDOC-identified metrics of low grip strength (absolute or standardized to body size/composition); low dual-energy x-ray absorptiometry (DXA) lean mass as previously defined in the literature (appendicular lean mass [ALM]/ht2 ); and slowness (walking speed <.8 m/s) with subsequent adverse outcomes (falls, hip fractures, mobility limitation, and mortality). DESIGN Individual-level, sex-stratified pooled analysis. We calculated odds ratios (ORs) or hazard ratios (HRs) for incident falls, mobility limitation, hip fractures, and mortality. Follow-up time ranged from 1 year for falls to 8.8 ± 2.3 years for mortality. SETTING Eight prospective observational cohort studies. PARTICIPANTS A total of 13,421 community-dwelling men and 4,828 community-dwelling women. MEASUREMENTS Grip strength by hand dynamometry, gait speed, and lean mass by DXA. RESULTS Low grip strength (absolute or standardized to body size/composition) was associated with incident outcomes, usually independently of slowness, in both men and women. ORs and HRs generally ranged from 1.2 to 3.0 for those below vs above the cut-point. DXA lean mass was not consistently associated with these outcomes. When considered together, those who had both muscle weakness by absolute grip strength (<35.5 kg in men and <20 kg in women) and slowness were consistently more likely to have a fall, hip fracture, mobility limitation, or die than those without either slowness or muscle weakness. CONCLUSION Older men and women with both muscle weakness and slowness have a higher likelihood of adverse health outcomes. These results support the inclusion of grip strength and walking speed as components in a summary definition of sarcopenia. J Am Geriatr Soc 68:1429-1437, 2020.
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Affiliation(s)
- Peggy M. Cawthon
- Research Institute, California Pacific Medical Center, San Francisco, California
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California
| | | | - Sheena M. Patel
- Research Institute, California Pacific Medical Center, San Francisco, California
| | - Anne Newman
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Thomas Travison
- Marcus Institute for Aging Research, Hebrew SeniorLife, Department of Medicine Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Douglas P. Kiel
- Marcus Institute for Aging Research, Hebrew SeniorLife, Department of Medicine Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Adam J. Santanasto
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Kristine E. Ensrud
- Center for Chronic Disease Outcomes Research, Minneapolis VA Health Care System, Minneapolis, Minnesota
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota
- Department of Medicine, University of Minnesota, Minneapolis, Minnesota
| | - Qian-Li Xue
- Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Johns Hopkins Medical Institute, Baltimore, Maryland
| | - Michelle Shardell
- Longitudinal Studies Section, The National Institute on Aging, Baltimore, Maryland
| | - Kate Duchowny
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California
| | | | - Karol M. Pencina
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Roger A. Fielding
- Nutrition, Exercise, Physiology, and Sarcopenia Laboratory, Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts
| | - Jay Magaziner
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
| | - Timothy Kwok
- Department of Medicine & Therapeutics and School of Public Health, Faculty of Medicine, The Chinese University of Hong Kong, New Territories, Shatin, Hong Kong
| | - Magnus Karlsson
- Department of Clinical Sciences in Malmo, Lund University, Malmo, Sweden
| | - Claes Ohlsson
- Centre of Bone and Arthritis Research, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Dan Mellström
- Centre of Bone and Arthritis Research, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Vasant Hirani
- Charles Perkins Centre, University of Sydney, Sydney, Australia
| | - Eva Ribom
- Department of surgical sciences, Orthopeadic Unit, Uppsala University, Uppsala, Sweden
| | | | - Shalender Bhasin
- Boston Claude D. Pepper Older Americans Independence Center, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
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Bhasin S, Travison TG, Manini TM, Patel S, Pencina KM, Fielding RA, Magaziner JM, Newman AB, Kiel DP, Cooper C, Guralnik JM, Cauley JA, Arai H, Clark BC, Landi F, Schaap LA, Pereira SL, Rooks D, Woo J, Woodhouse LJ, Binder E, Brown T, Shardell M, Xue QL, DʼAgostino RB, Orwig D, Gorsicki G, Correa-De-Araujo R, Cawthon PM. Sarcopenia Definition: The Position Statements of the Sarcopenia Definition and Outcomes Consortium. J Am Geriatr Soc 2020; 68:1410-1418. [PMID: 32150289 DOI: 10.1111/jgs.16372] [Citation(s) in RCA: 306] [Impact Index Per Article: 76.5] [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: 10/20/2019] [Revised: 01/25/2020] [Accepted: 01/29/2020] [Indexed: 01/28/2023]
Abstract
OBJECTIVES To develop an evidence-based definition of sarcopenia that can facilitate identification of older adults at risk for clinically relevant outcomes (eg, self-reported mobility limitation, falls, fractures, and mortality), the Sarcopenia Definition and Outcomes Consortium (SDOC) crafted a set of position statements informed by a literature review and SDOC's analyses of eight epidemiologic studies, six randomized clinical trials, four cohort studies of special populations, and two nationally representative population-based studies. METHODS Thirteen position statements related to the putative components of a sarcopenia definition, informed by the SDOC analyses and literature synthesis, were reviewed by an independent international expert panel (panel) iteratively and voted on by the panel during the Sarcopenia Position Statement Conference. Four position statements related to grip strength, three to lean mass derived from dual-energy x-ray absorptiometry (DXA), and four to gait speed; two were summary statements. RESULTS The SDOC analyses identified grip strength, either absolute or scaled to measures of body size, as an important discriminator of slowness. Both low grip strength and low usual gait speed independently predicted falls, self-reported mobility limitation, hip fractures, and mortality in community-dwelling older adults. Lean mass measured by DXA was not associated with incident adverse health-related outcomes in community-dwelling older adults with or without adjustment for body size. CONCLUSION The panel agreed that both weakness defined by low grip strength and slowness defined by low usual gait speed should be included in the definition of sarcopenia. These position statements offer a rational basis for an evidence-based definition of sarcopenia. The analyses that informed these position statements are summarized in this article and discussed in accompanying articles in this issue of the journal. J Am Geriatr Soc 68:1410-1418, 2020.
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Affiliation(s)
- Shalender Bhasin
- Boston Claude D. Pepper Older Americans Independence Center, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Thomas G Travison
- Department of Medicine Beth Israel Deaconess Medical Center and Harvard Medical School, Marcus Institute for Aging Research, Hebrew SeniorLife, Boston, Massachusetts
| | - Todd M Manini
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida
| | - Sheena Patel
- California Pacific Medical Center Research Institute, San Francisco Coordinating Center, San Francisco, California
| | - Karol M Pencina
- Boston Claude D. Pepper Older Americans Independence Center, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Roger A Fielding
- Nutrition, Exercise, Physiology, and Sarcopenia Laboratory, Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts
| | - Jay M Magaziner
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
| | - Anne B Newman
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Douglas P Kiel
- Department of Medicine Beth Israel Deaconess Medical Center and Harvard Medical School, Marcus Institute for Aging Research, Hebrew SeniorLife, Boston, Massachusetts
| | - Cyrus Cooper
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
| | - Jack M Guralnik
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
| | - Jane A Cauley
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Hidenori Arai
- National Center for Geriatrics and Gerontology, Obu, Japan
| | - Brian C Clark
- Department of Biomedical Sciences, Division of Geriatric Medicine, Ohio Musculoskeletal and Neurological Institute, Ohio University, Athens, Ohio
| | - Francesco Landi
- Department of Medicine and geriatrics, Catholic University of Sacred Heart, Rome, Italy
| | - Laura A Schaap
- Department of Health Sciences, Faculty of Science, Vrije Universiteit Amsterdam, Amsterdam Public Health Research institute, Amsterdam, The Netherlands
| | | | - Daniel Rooks
- Muscle Group, Translational Medicine, Novartis Institutes for Biomedical Research, Cambridge, Massachusetts
| | - Jean Woo
- CUHK Jockey Club Institute of Ageing, SH Ho Centre for Gerontology and Geriatrics, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Linda J Woodhouse
- Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Ellen Binder
- Division of Geriatrics, Washington University School of Medicine, St. Louis, Missouri
| | - Todd Brown
- Division of Endocrinology, Diabetes, & Metabolism, Johns Hopkins University, Baltimore, Maryland
| | - Michelle Shardell
- Epidemiology and Public Health, Longitudinal Studies Section, National Institute on Aging, Baltimore, Maryland
| | - Quian-Li Xue
- Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Johns Hopkins Medical Institute, Baltimore, Maryland
| | - Ralph B DʼAgostino
- Department of Mathematics, Framingham Heart Study, Boston University, Boston, Massachusetts
| | - Denise Orwig
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
| | - Greg Gorsicki
- Department of Kinesiology, Georgia Southern University
| | - Rosaly Correa-De-Araujo
- Division of Geriatrics and Clinical Gerontology, National Institute on Aging, Bethesda, Maryland
| | - Peggy M Cawthon
- California Pacific Medical Center Research Institute, San Francisco Coordinating Center, San Francisco, California
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Eren E, Hunt JFV, Shardell M, Chawla S, Tran J, Gu J, Vogt NM, Johnson SC, Bendlin BB, Kapogiannis D. Extracellular vesicle biomarkers of Alzheimer's disease associated with sub-clinical cognitive decline in late middle age. Alzheimers Dement 2020; 16:1293-1304. [PMID: 32588967 PMCID: PMC7984100 DOI: 10.1002/alz.12130] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 04/08/2020] [Accepted: 05/17/2020] [Indexed: 12/12/2022]
Abstract
Introduction Neuronal extracellular vesicle (nEV) tau and insulin signaling biomarkers may detect preclinical Alzheimer's disease and age‐associated cognitive decline. Methods This case‐control study used repeated serum samples from 73 cognitively declining and 73 stable Wisconsin Registry for Alzheimer's Prevention participants (62.4 ± 6.3 years old). We immunocaptured nEVs; measured tau and insulin signaling biomarkers; and examined biomarker differences by group, their performance in group classification in training and test datasets (97, 49 individuals, respectively), and whether they predict cognitive performance change. Results Declining compared to stable individuals showed higher baseline total, p231‐, and p181‐tau with older age and higher annualized change for p‐IR and p‐IGF‐1R. Combining biomarkers classified decliners with 94% area under the curve (AUC), 86.0% sensitivity and 86.7% specificity, in training data, and 75% AUC, 71.4% sensitivity, and 77.3% specificity, in test data. Insulin biomarkers predicted cognitive performance change prospectively. Discussion Combining nEV biomarkers can identify individuals with age‐associated cognitive decline.
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Affiliation(s)
- Erden Eren
- Laboratory of Clinical InvestigationIntramural Research ProgramNational Institute on AgingNIHBaltimoreMarylandUSA
| | - Jack F. V. Hunt
- Wisconsin Alzheimer's Disease Research CenterUniversity of WisconsinMadisonWisconsinUSA
| | | | - Sahil Chawla
- Laboratory of Clinical InvestigationIntramural Research ProgramNational Institute on AgingNIHBaltimoreMarylandUSA
| | - Joyce Tran
- Laboratory of Clinical InvestigationIntramural Research ProgramNational Institute on AgingNIHBaltimoreMarylandUSA
| | - Jeffrey Gu
- Laboratory of Clinical InvestigationIntramural Research ProgramNational Institute on AgingNIHBaltimoreMarylandUSA
| | - Nick M. Vogt
- Wisconsin Alzheimer's Disease Research CenterUniversity of WisconsinMadisonWisconsinUSA
| | - Sterling C. Johnson
- Wisconsin Alzheimer's Disease Research CenterUniversity of WisconsinMadisonWisconsinUSA
- Geriatric Research Education and Clinical Center of the Wm. S. MiddletonMemorial Veterans HospitalMadisonWisconsinUSA
| | - Barbara B. Bendlin
- Wisconsin Alzheimer's Disease Research CenterUniversity of WisconsinMadisonWisconsinUSA
| | - Dimitrios Kapogiannis
- Laboratory of Clinical InvestigationIntramural Research ProgramNational Institute on AgingNIHBaltimoreMarylandUSA
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Shardell M, Parimi N, Langsetmo L, Tanaka T, Jiang L, Orwoll E, Shikany JM, Kado DM, Cawthon PM. Comparing Analytical Methods for the Gut Microbiome and Aging: Gut Microbial Communities and Body Weight in the Osteoporotic Fractures in Men (MrOS) Study. J Gerontol A Biol Sci Med Sci 2020; 75:1267-1275. [PMID: 32025711 PMCID: PMC7447861 DOI: 10.1093/gerona/glaa034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 08/30/2019] [Indexed: 01/03/2023] Open
Abstract
Determining the role of gut microbial communities in aging-related phenotypes, including weight loss, is an emerging gerontology research priority. Gut microbiome datasets comprise relative abundances of microbial taxa that necessarily sum to 1; analysis ignoring this feature may produce misleading results. Using data from the Osteoporotic Fractures in Men (MrOS) study (n = 530; mean [SD] age = 84.3 [4.1] years), we assessed 163 genera from stool samples and body weight. We compared conventional analysis, which does not address the sum-to-1 constraint, to compositional analysis, which does. Specifically, we compared elastic net regression (for variable selection) and conventional Bayesian linear regression (BLR) and network analysis to compositional BLR and network analysis; adjusting for past weight, height, and other covariates. Conventional BLR identified Roseburia and Dialister (higher weight) and Coprococcus-1 (lower weight) after multiple comparisons adjustment (p < .0125); plus Sutterella and Ruminococcus-1 (p < .05). No conventional network module was associated with weight. Using compositional BLR, Coprococcus-2 and Acidaminococcus were most strongly associated with higher adjusted weight; Coprococcus-1 and Ruminococcus-1 were most strongly associated with lower adjusted weight (p < .05), but nonsignificant after multiple comparisons adjustment. Two compositional network modules with respective hub taxa Blautia and Faecalibacterium were associated with adjusted weight (p < .01). Findings depended on analytical workflow. Compositional analysis is advocated to appropriately handle the sum-to-1 constraint.
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Affiliation(s)
- Michelle Shardell
- Department of Epidemiology, Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland
| | - Neeta Parimi
- Research Institute, California Pacific Medical Center, San Francisco
| | - Lisa Langsetmo
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis
| | - Toshiko Tanaka
- Translational Gerontology Branch, National Institute on Aging Intramural Research Program, Baltimore, Maryland
| | - Lingjing Jiang
- Departments of Family Medicine and Public Health and Internal Medicine, University of California, San Diego School of Medicine, La Jolla
| | - Eric Orwoll
- Department of Medicine, Oregon Health & Sciences University, Portland
| | - James M Shikany
- Division of Preventive Medicine, School of Medicine, University of Alabama at Birmingham, Birmingham
| | - Deborah M Kado
- Departments of Family Medicine and Public Health and Internal Medicine, University of California, San Diego School of Medicine, La Jolla
| | - Peggy M Cawthon
- Research Institute, California Pacific Medical Center, San Francisco
- Department of Epidemiology and Biostatistics, University of California, San Francisco
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Cawthon PM, Travison TG, Manini TM, Patel S, Pencina KM, Fielding RA, Magaziner JM, Newman AB, Brown T, Kiel DP, Cummings SR, Shardell M, Guralnik JM, Woodhouse LJ, Pahor M, Binder E, D’Agostino RB, Quian-Li X, Orwoll E, Landi F, Orwig D, Schaap L, Latham NK, Hirani V, Kwok T, Pereira SL, Rooks D, Kashiwa M, Torres-Gonzalez M, Menetski JP, Correa-De-Araujo R, Bhasin S. Establishing the Link Between Lean Mass and Grip Strength Cut Points With Mobility Disability and Other Health Outcomes: Proceedings of the Sarcopenia Definition and Outcomes Consortium Conference. J Gerontol A Biol Sci Med Sci 2020; 75:1317-1323. [PMID: 30869772 PMCID: PMC7447857 DOI: 10.1093/gerona/glz081] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [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: 07/22/2018] [Accepted: 03/13/2019] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Lack of consensus on how to diagnose sarcopenia has limited the ability to diagnose this condition and hindered drug development. The Sarcopenia Definitions and Outcomes Consortium (SDOC) was formed to develop evidence-based diagnostic cut points for lean mass and/or muscle strength that identify people at increased risk of mobility disability. We describe here the proceedings of a meeting of SDOC and other experts to discuss strategic considerations in the development of evidence-based sarcopenia definition. METHODS Presentations and panel discussions reviewed the usefulness of sarcopenia as a biomarker, the analytical approach used by SDOC to establish cut points, and preliminary findings, and provided strategic direction to develop an evidence-based definition of sarcopenia. RESULTS The SDOC assembled data from eight epidemiological cohorts consisting of 18,831 participants, clinical populations from 10 randomized trials and observational studies, and 2 nationally representative cohorts. In preliminary assessments, grip strength or grip strength divided by body mass index was identified as discriminators of risk for mobility disability (walking speed <0.8 m/s), whereas dual-energy X-ray absorptiometry-derived lean mass measures were not good discriminators of mobility disability. Candidate definitions based on grip strength variables were associated with increased risk of mortality, falls, mobility disability, and instrumental activities of daily living disability. The prevalence of low grip strength increased with age. The attendees recommended the establishment of an International Expert Panel to review a series of position statements on sarcopenia definition that are informed by the findings of the SDOC analyses and synthesis of literature. CONCLUSIONS International consensus on an evidence-based definition of sarcopenia is needed. Grip strength-absolute or adjusted for body mass index-is an important discriminator of mobility disability and other endpoints. Additional research is needed to develop a predictive risk model that takes into account sarcopenia components as well as age, sex, race, and comorbidities.
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Affiliation(s)
- Peggy M Cawthon
- California Pacific Medical Center Research Institute, San Francisco Coordinating Center, California
| | - Thomas G Travison
- Department of Medicine, Marcus Institute for Aging Research, Hebrew SeniorLife, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | | | - Sheena Patel
- California Pacific Medical Center Research Institute, San Francisco Coordinating Center, California
| | - Karol M Pencina
- Boston Claude D. Pepper Older Americans Independence Center, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Roger A Fielding
- Nutrition, Exercise Physiology and Sarcopenia Laboratory, Jean Mayer U.S. Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts
| | - Jay M Magaziner
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
| | - Anne B Newman
- Department of Epidemiology, University of Pittsburgh, Pennsylvania
| | - Todd Brown
- Division of Endocrinology, Diabetes, and Metabolism, Johns Hopkins University, Baltimore, Maryland
| | - Douglas P Kiel
- Department of Medicine, Marcus Institute for Aging Research, Hebrew SeniorLife, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts,Longitudinal Studies Section, The National Institute on Aging, Baltimore, Maryland
| | - Steve R Cummings
- California Pacific Medical Center Research Institute, San Francisco Coordinating Center, California
| | - Michelle Shardell
- Longitudinal Studies Section, The National Institute on Aging, Baltimore, Maryland
| | - Jack M Guralnik
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
| | - Linda J Woodhouse
- Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Canada
| | | | - Ellen Binder
- Division of Geriatrics, Washington University School of Medicine, St Louis, Missouri
| | - Ralph B D’Agostino
- Department of Mathematics, Framingham Heart Study, Boston University, Massachusetts
| | - Xue Quian-Li
- Director of Biostatistics, Division of Geriatric Medicine and Gerontology and Center on Aging and Health, Johns Hopkins Medical Institute, Baltimore, Maryland
| | - Eric Orwoll
- Division of Endocrinology, Metabolism and Clinical Nutrition, Oregon Health and Sciences University, Portland
| | - Francesco Landi
- Department of Medicine and Geriatrics, Catholic University of Sacred Heart, Rome, Italy
| | - Denise Orwig
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
| | - Laura Schaap
- Faculty of Science, Nutrition and Health Aging and Later Life, Free University of Amsterdam, The Netherlands
| | - Nancy K Latham
- Boston Claude D. Pepper Older Americans Independence Center, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Vasant Hirani
- School of Life and Environmental Sciences, University of Sydney, Australia
| | - Timothy Kwok
- Department of Medicine and Therapeutics, Faculty of Medicine,School of Public Health, The Chinese University of Hong Kong, China
| | | | - Daniel Rooks
- Novartis Biomedical Research Institute, Cambridge, Massachusetts
| | | | | | - Joseph P Menetski
- The Foundation for the National Institutes of Health, Bethesda, Maryland
| | | | - Shalender Bhasin
- Boston Claude D. Pepper Older Americans Independence Center, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts,Address correspondence to: Shalender Bhasin, MB, BS, Boston Claude D. Pepper Older Americans Independence Center, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115. E-mail:
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Orwig DL, Magaziner J, Fielding RA, Zhu H, Binder EF, Cawthon PM, Bhasin S, Correa-de-Araujo R, Manini T, Patel S, Shardell M, Travison TG. Application of SDOC Cut Points for Low Muscle Strength for Recovery of Walking Speed After Hip Fracture. J Gerontol A Biol Sci Med Sci 2020; 75:1379-1385. [PMID: 32242218 PMCID: PMC7302178 DOI: 10.1093/gerona/glaa076] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 06/21/2019] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Sarcopenia is often conceptualized as a precursor to loss of mobility, but its effect on recovery of mobility after a hip fracture is unknown. We determined the prevalence of low muscle strength (weakness) after hip fracture using putative sarcopenia metrics (absolute grip strength, and grip strength normalized to body mass index, total body fat, arm lean mass, and weight) identified by the Sarcopenia Definitions and Outcomes Consortium (SDOC). METHODS We examined two well-characterized hip fracture cohorts of community-dwelling older adults from the Baltimore Hip Studies (BHS). The prevalence of muscle weakness was assessed using the SDOC cut points compared to published definitions at 2 and 6 months postfracture. We assessed associations of 2-month weakness with 6-month walking speed <0.6 m/s and calculated the sensitivity and specificity in predicting lack of meaningful change in walking speed (change < 0.1 m/s) at 6 months. RESULTS Two hundred and forty-six participants (192 women; 54 men) were included; mean (SD) age of 81 (8) for women and 78 (7) for men. At 2 months, 91% women and 78% men exhibited slow walking speed (< 0.6 m/s). SDOC grip strength standardized by weight (<0.34 kg women, <0.45 kg men) was the most prevalent measure of weakness in men (74%) and women (79%) and provided high sensitivity in men (86%) and women (84%) predicting lack of meaningful change in walking speed at 6 months, although specificity was poor to moderate. CONCLUSIONS SDOC cut points for grip strength standardized to weight provided consistent indication of poor walking speed performance post-hip fracture.
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Affiliation(s)
- Denise L Orwig
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore,Address correspondence to: Denise L. Orwig, PhD, University of Maryland School of Medicine, 660 West Redwood Street, Suite 200, Baltimore, MD 21201. E-mail:
| | - Jay Magaziner
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
| | - Roger A Fielding
- Nutrition, Exercise Physiology and Sarcopenia Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts
| | - Hao Zhu
- Marcus Institute for Aging Research, Hebrew SeniorLife, Boston, Massachusetts
| | - Ellen F Binder
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Peggy M Cawthon
- California Pacific Medical Research Institute, San Francisco,Department of Epidemiology and Biostatistics, University of California, San Francisco
| | - Shalender Bhasin
- Research Program in Men’s Health: Aging and Metabolism, Brigham and Women’s Hospital, Boston, Massachusetts
| | - Rosaly Correa-de-Araujo
- Division of Geriatrics and Clinical Gerontology, National Institute on Aging, Bethesda, Maryland
| | - Todd Manini
- Department of Aging and Geriatric Research, University of Florida, Gainesville
| | - Sheena Patel
- California Pacific Medical Research Institute, San Francisco
| | - Michelle Shardell
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore,Longitudianl Studies Section, National Institute on Aging, Bethesda, Maryland
| | - Thomas G Travison
- Marcus Institute for Aging Research, Hebrew SeniorLife, Boston, Massachusetts,Department of Medicine, Harvard Medical School, Boston, Massachusetts
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Shardell M, Drew DA, Semba RD, Harris TB, Cawthon PM, Simonsick EM, Kalyani RR, Schwartz AV, Kritchevsky SB, Newman AB. Plasma Soluble αKlotho, Serum Fibroblast Growth Factor 23, and Mobility Disability in Community-Dwelling Older Adults. J Endocr Soc 2020; 4:bvz032. [PMID: 32405607 PMCID: PMC7209777 DOI: 10.1210/jendso/bvz032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 04/20/2020] [Indexed: 12/13/2022] Open
Abstract
CONTEXT αKlotho is a hormone and co-receptor for fibroblast growth factor 23 (FGF23), a hormone that downregulates active vitamin D synthesis and promotes phosphate excretion. Low αKlotho and high FGF23 occur in chronic kidney disease (CKD). OBJECTIVE We aimed to assess the relationships of αKlotho and FGF23 with mobility disability in community-dwelling older adults. DESIGN AND SETTING We estimated associations of plasma-soluble αKlotho and serum FGF23 concentrations with mobility disability over 6 years. Additional analyses was stratified by CKD. PARTICIPANTS Participants included 2751 adults (25.0% with CKD), aged 71 to 80 years, from the 1998 to 1999 Health, Aging, and Body Composition Study visit. MAIN OUTCOME MEASURES Walking disability and stair climb disability were defined as self-reported "a lot of difficulty" or an inability to walk a quarter mile and climb 10 stairs, respectively. RESULTS Median (interquartile range [IQR]) serum FGF23 and plasma soluble αKlotho concentrations were 46.6 (36.7, 60.2) pg/mL and 630.4 (478.4, 816.0) pg/mL, respectively. After adjustment, higher αKlotho concentrations were associated with lower walking disability rates (Rate Ratio [RR] highest vs. lowest tertile = 0.74; 95% confidence interval l [CI] = 0.62, 0.89; P = 0.003). Higher FGF23 concentrations were associated with higher walking disability rates (RR highest vs. lowest tertile = 1.24; 95%CI = 1.03, 1.50; P = 0.005). Overall, higher αKlotho combined with lower FGF23 was associated with the lowest walking disability rates (P for interaction = 0.023). Stair climb disability findings were inconsistent. No interactions with CKD were statistically significant (P for interaction > 0.10). CONCLUSIONS Higher plasma soluble αKlotho and lower serum FGF23 concentrations were associated with lower walking disability rates in community-dwelling older adults, particularly those without CKD.
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Affiliation(s)
- Michelle Shardell
- Institute for Genome Sciences, Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
| | - David A Drew
- Division of Nephrology, Department of Medicine, Tufts Medical Center, Boston, Massachusetts
| | - Richard D Semba
- Department of Ophthalmology, Johns Hopkins Medical Institutions, Baltimore, Maryland
| | - Tamara B Harris
- Laboratory of Epidemiology and Population Science, National Institute on Aging Intramural Research Program, Bethesda, Maryland
| | - Peggy M Cawthon
- Research Institute, California Pacific Medical Center, San Francisco, California
- Department of Epidemiology and Biostatistics, University of California, San Francisco, California
| | - Eleanor M Simonsick
- Translational Gerontology Branch, National Institute on Aging Intramural Research Program, Baltimore, Maryland
| | - Rita R Kalyani
- Department of Endocrinology, Metabolism, and Diabetes, Johns Hopkins Medical Institutions, Baltimore Maryland
| | - Ann V Schwartz
- Department of Epidemiology and Biostatistics, University of California, San Francisco, California
| | - Stephen B Kritchevsky
- Sticht Center for Healthy Aging and Alzheimer’s Prevention, Wake Forest University, Winston-Salem, North Carolina
| | - Anne B Newman
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania
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Adelnia F, Ubaida‐Mohien C, Moaddel R, Shardell M, Lyashkov A, Fishbein KW, Aon MA, Spencer RG, Ferrucci L. Proteomic signatures of in vivo muscle oxidative capacity in healthy adults. Aging Cell 2020; 19:e13124. [PMID: 32196924 PMCID: PMC7189997 DOI: 10.1111/acel.13124] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 11/24/2019] [Accepted: 01/25/2020] [Indexed: 12/18/2022] Open
Abstract
Adequate support of energy for biological activities and during fluctuation of energetic demand is crucial for healthy aging; however, mechanisms for energy decline as well as compensatory mechanisms that counteract such decline remain unclear. We conducted a discovery proteomic study of skeletal muscle in 57 healthy adults (22 women and 35 men; aged 23–87 years) to identify proteins overrepresented and underrepresented with better muscle oxidative capacity, a robust measure of in vivo mitochondrial function, independent of age, sex, and physical activity. Muscle oxidative capacity was assessed by 31P magnetic resonance spectroscopy postexercise phosphocreatine (PCr) recovery time (τPCr) in the vastus lateralis muscle, with smaller τPCr values reflecting better oxidative capacity. Of the 4,300 proteins quantified by LC‐MS in muscle biopsies, 253 were significantly overrepresented with better muscle oxidative capacity. Enrichment analysis revealed three major protein clusters: (a) proteins involved in key energetic mitochondrial functions especially complex I of the electron transport chain, tricarboxylic acid (TCA) cycle, fatty acid oxidation, and mitochondrial ABC transporters; (b) spliceosome proteins that regulate mRNA alternative splicing machinery, and (c) proteins involved in translation within mitochondria. Our findings suggest that alternative splicing and mechanisms that modulate mitochondrial protein synthesis are central features of the molecular mechanisms aimed at maintaining mitochondrial function in the face of impairment. Whether these mechanisms are compensatory attempt to counteract the effect of aging on mitochondrial function should be further tested in longitudinal studies.
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Affiliation(s)
- Fatemeh Adelnia
- Translational Gerontology Branch Intramural Research Program National Institute on AgingNational Institutes of Health Baltimore Maryland
- Vanderbilt University Institute of Imaging Science Vanderbilt University Medical Center Nashville Tennessee
| | - Ceereena Ubaida‐Mohien
- Translational Gerontology Branch Intramural Research Program National Institute on AgingNational Institutes of Health Baltimore Maryland
| | - Ruin Moaddel
- Laboratory of Clinical Investigation Intramural Research Program National Institute on Aging, National Institutes of Health Baltimore Maryland
| | - Michelle Shardell
- Translational Gerontology Branch Intramural Research Program National Institute on AgingNational Institutes of Health Baltimore Maryland
| | - Alexey Lyashkov
- Laboratory of Clinical Investigation Intramural Research Program National Institute on Aging, National Institutes of Health Baltimore Maryland
| | - Kenneth W. Fishbein
- Laboratory of Clinical Investigation Intramural Research Program National Institute on Aging, National Institutes of Health Baltimore Maryland
| | - Miguel A. Aon
- Translational Gerontology Branch Intramural Research Program National Institute on AgingNational Institutes of Health Baltimore Maryland
| | - Richard G. Spencer
- Laboratory of Clinical Investigation Intramural Research Program National Institute on Aging, National Institutes of Health Baltimore Maryland
| | - Luigi Ferrucci
- Translational Gerontology Branch Intramural Research Program National Institute on AgingNational Institutes of Health Baltimore Maryland
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Simonsick EM, Simonsick E, Moore AZ, Shardell M, Shaffer NC, Tanaka T. THE BALTIMORE LONGITUDINAL STUDY OF AGING: OPPORTUNITIES FOR RESEARCH ON WOMEN'S AGING AND HEALTH. Innov Aging 2019. [PMCID: PMC6840991 DOI: 10.1093/geroni/igz038.1290] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The Baltimore Longitudinal Study of Aging (BLSA), an ongoing continuous enrollment cohort study of normative aging established in 1958 currently conducted by the NIA Intramural Research Program, began including women in 1978. To date, nearly 1200 women aged 17-94 at enrollment (median=53 Q1-Q3=40-70) have been followed for up to 21 visits spanning 40 years (median visits=6; Q1-Q3=3-9). Over 3 days, participants receive comprehensive examinations, interviews, imaging and functional and cognitive evaluations; repeat visits occur every 1-4 years depending on age. The BLSA offers opportunities to examine distributions of, change in and interrelationships among several rarely concurrently ascertained parameters (e.g., cardiovascular fitness, resting metabolic rate, glucose challenge response, five-factor personality, brain volumes, and diet) over the life course and across birth cohorts. The BLSA also maintains an extensive biorepository. This talk will summarize the extensive measurement catalogue and timeline and provide illustrative examples from ongoing research on women’s aging and health.
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Affiliation(s)
- Eleanor M Simonsick
- Longitudinal Studies Section, Intramural Research Program, National Institute on Aging, Baltimore, Maryland, United States
| | - Eleanor Simonsick
- Intramural Research Program, National Institute on Aging, Baltimore, Maryland, United States
| | - Ann Z Moore
- National Institute on Aging, Baltimore, Maryland, United States
| | | | - Nancy C Shaffer
- National Institute on Aging, Baltimore, Maryland, United States
| | - Toshiko Tanaka
- National Institute on Aging, Baltimore, Maryland, United States
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Schrack JA, Kuo PL, Simonsick EM, Resnick SM, Levine M, Shardell M. TRAJECTORIES OF PHENOTYPIC MARKERS OF AGING AS PRECURSORS TO FUNCTIONAL CHANGE. Innov Aging 2019. [PMCID: PMC6846378 DOI: 10.1093/geroni/igz038.2146] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Delineating trajectories of aging phenotypes is essential to understanding mechanisms of clinical disease and disability. We investigated longitudinal changes in measures of body composition, energy expenditure, and brain volumes in >900 participants (age 67.0 (IQR: 57-77) years, 48.1% male) of the Baltimore Longitudinal Study of Aging using mixed effects regression models. Computed tomography-derived thigh muscle cross-sectional area declined 754.2 cm2 per decade at age 60 years (p<0.001) and 1294.3 cm2 at 75 years (p<0.001). Energy reserves, defined as a ratio of energy-cost-to-energy-capacity measured using indirect calorimetry, decreased 11.2% per decade at 60 years (p<0.001), and 16.8% at 75 years (p<0.001). MRI-derived measures of total brain volumes declined 41.6 cm3 per decade at 60 years (p<0.001) and 44.9 cm3 at 75 years (p<0.001). Linking these findings to biological and clinical measures of aging may contribute to more accurate assessment of phenotypic age.
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Affiliation(s)
| | - Pei-Lun Kuo
- Johns Hopkins University, Baltimore, Maryland, United States
| | | | - Susan M Resnick
- National Institute on Aging, Baltimore, Maryland, United States
| | - Morgan Levine
- Yale University, New Haven, Connecticut, United States
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Levine ME, Kuo P, Schrack J, Simonsick EM, Resnick S, Shardell M, Ferrucci L. SYSTEMS-LEVEL MODELING OF BIOLOGICAL AND MOLECULAR AGING CHANGES OVER TIME. Innov Aging 2019. [PMCID: PMC6845865 DOI: 10.1093/geroni/igz038.2145] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Aging is associated with numerous changes at all levels of biological organization. Harnessing this information to develop measures that accurately and reliably quantify the biological aging process will require longitudinal modeling and incorporation of systems level approaches. We will describe applications of network modeling for longitudinal multi-system biomarker data. Using data from the Baltimore Longitudinal Study of Aging (BLSA) we are able to generate systems level models of biological and physiological function, and then demonstrate how these networks change with age. We will also link systems-level aging changes to hallmarks of aging, including epigenetic alterations, senescence, mitochondrial dysfunction, and proteostasis. Given the complexity of the biological aging process, modeling of systems dynamics over time will both lead to the development of better biomarkers of aging, and also inform our conceptualization of how alterations at the molecular level propagate up levels of organization to eventually influence morbidity and mortality risk.
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Affiliation(s)
- Morgan E Levine
- Yale University School of Medicine, New Haven, Connecticut, United States
| | - Perry Kuo
- Johns Hopkins, Maryland, Maryland, United States
| | | | | | - Susan Resnick
- National Institute on Aging, Baltimore, Maryland, United States
| | | | - Luigi Ferrucci
- National Institute on Aging, Baltimore, Maryland, United States
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Adelnia F, Urbanek J, Osawa Y, Shardell M, Simonsick EM, Schrack JA, Ferrucci L. THE ASSOCIATION BETWEEN MODERATE-TO-VIGOROUS PHYSICAL ACTIVITY AND MUSCLE OXIDATIVE CAPACITY IN OLDER ADULTS. Innov Aging 2019. [PMCID: PMC6845301 DOI: 10.1093/geroni/igz038.326] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Age-related decline in muscle oxidative capacity negatively affects muscle function and mobility, which may lead to disability and frailty. Whether exercise and other life-style practices reduce age-related decline in muscle oxidative capacity is unclear. We assessed whether, after accounting for age, higher daily physical activity levels are associated with greater muscle oxidative capacity. Participants included 384 adults (54.7% women) aged 22 to 92 years from the Baltimore Longitudinal Study of Aging. Muscle oxidative capacity was measured in vivo using phosphorous magnetic resonance spectroscopy. We determined the time constant for phosphocreatine recovery (τPCr, in seconds) after exercise, with lower values of τPCr reflecting greater oxidative capacity. Time spent in moderate-to-vigorous physical activity (MVPA) was assessed using accelerometers that participants wore for 5.9 ± 0.9 consecutive days in the free-living environment. In linear regression models, older age was associated with higher τPCr (β = 0.39, p-value <.001) after adjusting for sex, race, height and weight. After including MVPA as an independent variable, the standardized regression coefficient for age was attenuated by 40% to 0.22. p-value <.001). MVPA was strongly associated with lower τPCr (β = -0.33, p-value <.001) after adjusting for health status, education and smoking history and was only attenuated by 3% after additional adjustment for age. These results suggest that MVPA is strongly associated with muscle oxidative capacity independent of age, providing mechanistic insights into the health benefits of daily physical activity in older persons.
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Affiliation(s)
- Fatemeh Adelnia
- National Institute of Health, Baltimore, Maryland, United States
| | - Jacek Urbanek
- John Hopkins University School of Medicine, Department of Medicine, Division of Geriatric Medicine and Gerontology, Center on Aging and Health, Baltimore, Maryland, United States
| | - Yusuke Osawa
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States
| | - Michelle Shardell
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States
| | - Eleanor M Simonsick
- Longitudinal Studies Section, Intramural Research Program, National Institute on Aging, Baltimore, Maryland, United States
| | | | - Luigi Ferrucci
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States
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Shardell M, Shardell M, Kuo PL, Schrack J, Simonsick EM, Resnick SM, Levine ME, Ferrucci L. ANALYTICAL CONSIDERATIONS OF DEVELOPING A PHENOTYPIC AGING MEASURE: THE CONCEPTUAL FRAMEWORK MUST COME FIRST! Innov Aging 2019. [PMCID: PMC6846545 DOI: 10.1093/geroni/igz038.2148] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We propose a latent structural model framework where phenotypic aging is a latent variable influenced by chronological age, genes and environment. Within this framework, phenotypic age influences aging-related outcomes and is reflected by latent domains of aging (body composition, energetics, homeostasis, and neural functioning) reflected by biomarkers. First, we validate the framework by selecting age-associated domain-specific biomarkers and assessing internal consistency and convergent construct validity (Cronbach’s alpha). Using data from the Baltimore Longitudinal Study of Aging, within-domain Cronbach’s alphas ranged from 0.80 to 0.92, supporting convergent construct validity. Second, we evaluate two broad methods for combining biomarkers into one phenotypic age measure customized to different objectives: 1) confirmatory factor analysis of chronological age-adjusted biomarkers to create a measure to identify pleiotropic genetic and environmental mechanisms, and 2) machine-learning methods to create a measure optimizing predictive and concurrent criterion validity. This framework will enable evaluation of candidate biological mechanisms of aging.
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Affiliation(s)
- Michelle Shardell
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States
| | | | - Pei-Lun Kuo
- Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, United States
| | - Jennifer Schrack
- Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, United States
| | | | - Susan M Resnick
- National Institute on Aging, Baltimore, Maryland, United States
| | - Morgan E Levine
- Yale School of Medicine, New Haven, Connecticut, United States
| | - luigi Ferrucci
- National Institute on Aging, Baltimore, Maryland, United States
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Ubaida-Mohien C, Lyashkov A, Gonzalez-Freire M, Tharakan R, Shardell M, Moaddel R, Semba RD, Chia CW, Gorospe M, Sen R, Ferrucci L. Discovery proteomics in aging human skeletal muscle finds change in spliceosome, immunity, proteostasis and mitochondria. eLife 2019; 8:49874. [PMID: 31642809 PMCID: PMC6810669 DOI: 10.7554/elife.49874] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 09/16/2019] [Indexed: 12/19/2022] Open
Abstract
A decline of skeletal muscle strength with aging is a primary cause of mobility loss and frailty in older persons, but the molecular mechanisms of such decline are not understood. Here, we performed quantitative proteomic analysis from skeletal muscle collected from 58 healthy persons aged 20 to 87 years. In muscle from older persons, ribosomal proteins and proteins related to energetic metabolism, including those related to the TCA cycle, mitochondria respiration, and glycolysis, were underrepresented, while proteins implicated in innate and adaptive immunity, proteostasis, and alternative splicing were overrepresented. Consistent with reports in animal models, older human muscle was characterized by deranged energetic metabolism, a pro-inflammatory environment and increased proteolysis. Changes in alternative splicing with aging were confirmed by RNA-seq analysis. We propose that changes in the splicing machinery enables muscle cells to respond to a rise in damage with aging. As humans age, their muscles become weaker, making it increasingly harder for them to move, a condition known as sarcopenia. Analyzing old muscles in other animals revealed that they produce energy inefficiently, they destroy more proteins than younger muscles, and they have high levels of molecules that cause inflammation. These characteristics may be involved in causing muscle weakness. Proteomics is the study of proteins, the molecules that play many roles in keeping the body working: for example, they accelerate chemical reactions, participate in copying DNA and help cells respond to stimuli. Using proteomics, it is possible to examine a large number of the different proteins in a tissue, which can provide information about the state of that tissue. Ubaida-Mohien et al. used this approach to answer the question of why muscles become weaker with age. First, they analyzed the levels of all the proteins found in skeletal muscle collected from 58 healthy volunteers between 20 and 87 years of age. This revealed that the muscles of older people have fewer copies of the proteins that make up ribosomes – the cellular machines that produce new proteins – and fewer proteins involved in providing the cell with chemical energy. In contrast, proteins implicated in the immune system, in the maintenance of existing proteins, and in processing other molecules called RNAs were more abundant in older muscles. Ubaida-Mohien et al. then looked more closely at changes involving RNA processing. Cells make proteins by copying DNA sequences into an RNA template and using this template to instruct the ribosomes on how to make the specific protein. Before the RNA can be ‘read’ by a ribosome, however, some parts must be cut out and others added, which can lead to different versions of the final RNA, also known as alternative transcripts. In order to check whether the difference in the levels of proteins that process RNAs was affecting the RNAs being produced, Ubaida-Mohien et al. extracted the RNAs from older and younger muscles and compared them. This showed that the RNA in older people had more alternative transcripts, confirming that the change in protein levels was having downstream effects. Currently, it is not possible to prevent or delay the loss of muscle strength associated with aging. Understanding how the protein make-up of muscles changes as humans grow older may help find new ways to prevent and perhaps even reverse this decline.
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Affiliation(s)
- Ceereena Ubaida-Mohien
- Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, United States
| | - Alexey Lyashkov
- Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, United States
| | - Marta Gonzalez-Freire
- Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, United States
| | - Ravi Tharakan
- Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, United States
| | - Michelle Shardell
- Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, United States
| | - Ruin Moaddel
- Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, United States
| | | | - Chee W Chia
- Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, United States
| | - Myriam Gorospe
- Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, United States
| | - Ranjan Sen
- Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, United States
| | - Luigi Ferrucci
- Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, United States
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Magaziner J, Mangione KK, Orwig D, Baumgarten M, Magder L, Terrin M, Fortinsky RH, Gruber-Baldini AL, Beamer BA, Tosteson ANA, Kenny AM, Shardell M, Binder EF, Koval K, Resnick B, Miller R, Forman S, McBride R, Craik RL. Effect of a Multicomponent Home-Based Physical Therapy Intervention on Ambulation After Hip Fracture in Older Adults: The CAP Randomized Clinical Trial. JAMA 2019; 322:946-956. [PMID: 31503309 PMCID: PMC6737521 DOI: 10.1001/jama.2019.12964] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [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] [Indexed: 12/20/2022]
Abstract
IMPORTANCE Disability persists after hip fracture in older persons. Current rehabilitation may not be sufficient to restore ability to walk in the community. OBJECTIVE To compare a multicomponent home-based physical therapy intervention (training) with an active control on ability to walk in the community. DESIGN, SETTING, AND PARTICIPANTS Parallel, 2-group randomized clinical trial conducted at 3 US clinical centers (Arcadia University, University of Connecticut Health Center, and University of Maryland, Baltimore). Randomization began on September 16, 2013, and ended on June 20, 2017; follow-up ended on October 17, 2017. Patients aged 60 years and older were enrolled after nonpathologic, minimal trauma hip fracture, if they were living in the community and walking without human assistance before the fracture, were assessed within 26 weeks of hospitalization, and were not able to walk during daily activities at the time of enrollment. A total of 210 participants were randomized and reassessed 16 and 40 weeks later. INTERVENTIONS The training intervention (active treatment) (n = 105) included aerobic, strength, balance, and functional training. The active control group (n = 105) received transcutaneous electrical nerve stimulation and active range-of-motion exercises. Both groups received 2 to 3 home visits from a physical therapist weekly for 16 weeks; nutritional counseling; and daily vitamin D (2000 IU), calcium (600 mg), and multivitamins. MAIN OUTCOMES AND MEASURES The primary outcome (community ambulation) was defined as walking 300 m or more in 6 minutes at 16 weeks after randomization. The study was designed to test a 1-sided hypothesis of superiority of training compared with active control. RESULTS Among 210 randomized participants (mean age, 80.8 years; 161 women [76.7%]), 197 (93.8%) completed the trial (187 [89.0%] by completing the 6-minute walk test at 16 weeks and 10 [4.8%] by adjudication of the primary outcome). Among these, 22 of 96 training participants (22.9%) and 18 of 101 active control participants (17.8%) (difference, 5.1% [1-sided 97.5% CI, -∞ to 16.3%]; 1-sided P = .19) became community ambulators. Seventeen training participants (16.2%) and 15 control participants (14.3%) had 1 or more reportable adverse events during the intervention period. The most common reportable adverse events reported were falls (training: 6 [5.7%], control: 4 [3.8%]), femur/hip fracture (2 in each group), pneumonia (training: 2, control: 0), urinary tract infection (training: 2, control: 0), dehydration (training: 0, control: 2), and dyspnea (training: 0, control: 2). CONCLUSIONS AND RELEVANCE Among older adults with a hip fracture, a multicomponent home-based physical therapy intervention compared with an active control that included transcutaneous electrical nerve stimulation and active range-of-motion exercises did not result in a statistically significant improvement in the ability to walk 300 m or more in 6 minutes after 16 weeks. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT01783704.
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Affiliation(s)
- Jay Magaziner
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
| | - Kathleen K. Mangione
- Department of Physical Therapy, College of Health Sciences, Arcadia University, Glenside, Pennsylvania
| | - Denise Orwig
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
| | - Mona Baumgarten
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
| | - Laurence Magder
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
| | - Michael Terrin
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
| | | | - Ann L. Gruber-Baldini
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
| | - Brock A. Beamer
- Gerontology Research, Education and Clinical Center (GRECC) at Baltimore Veterans Affairs Medical Center, Baltimore, Maryland
- Division of Gerontology and Geriatric Medicine, University of Maryland School of Medicine, Baltimore
| | - Anna N. A. Tosteson
- Department of Medicine, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
- The Dartmouth Institute for Health Policy and Clinical Practice, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Anne M. Kenny
- Department of Medicine, UConn Health, Farmington, Connecticut
| | - Michelle Shardell
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
- National Institute on Aging, National Institutes of Health, Baltimore, Maryland
| | - Ellen F. Binder
- Division of Geriatrics and Nutritional Science, Washington University School of Medicine, St Louis, Missouri
| | - Kenneth Koval
- Department of Orthopaedic Surgery, Orlando Regional Medical Centre, Orlando, Florida
| | | | - Ram Miller
- Novartis Institutes for BioMedical Research, Cambridge, Massachusetts
| | - Sandra Forman
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore
| | | | - Rebecca L. Craik
- Department of Physical Therapy, College of Health Sciences, Arcadia University, Glenside, Pennsylvania
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Adelnia F, Urbanek J, Osawa Y, Shardell M, Brennan NA, Fishbein KW, Spencer RG, Simonsick EM, Schrack JA, Ferrucci L. Moderate-to-Vigorous Physical Activity Is Associated With Higher Muscle Oxidative Capacity in Older Adults. J Am Geriatr Soc 2019; 67:1695-1699. [PMID: 31116422 PMCID: PMC6684385 DOI: 10.1111/jgs.15991] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [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: 02/06/2019] [Revised: 04/21/2019] [Accepted: 05/02/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND Age-related decline in muscle oxidative capacity reduces muscle function and physical performance, leading to disability and frailty. Whether age-related decline in oxidative capacity is modified by exercise and other lifestyle practices is unclear. Therefore, we tested the hypothesis that physical activity is associated with better oxidative capacity, independent of age. DESIGN Cross-sectional study performed in the Baltimore Longitudinal Study of Aging, conducted by the Intramural Research Program (IRP) of the National Institute on Aging (NIA). SETTING NIA IRP Clinical Research Unit, Baltimore, MD. PARTICIPANTS Participants included 384 adults (54.7% women), aged 22 to 92 years, seen between 2013 and 2017. MEASUREMENTS Muscle oxidative capacity was measured in vivo using phosphorous magnetic resonance spectroscopy. We determined the postexercise time constant (τPCr ; in seconds) for phosphocreatine (PCr) recovery, with lower values of τPCr, (ie, more rapid recovery of PCr levels after exercise) reflecting greater oxidative capacity. Time spent in moderate-to-vigorous physical activity (MVPA) was assessed using wearable accelerometers that participants wore 5.9 ± 0.9 consecutive days in the free-living environment. RESULTS In linear regression models, higher τPCr was associated with older age (standardized β = .39; P < .001) after adjusting for sex, race, height, and weight. After including MVPA as an independent variable, the standardized regression coefficient of age decreased by 40%, but remained associated with τPCr (βage = .22; P < .001) and had a smaller standardized regression coefficient than MVPA (βMVPA = -.33; P < .001). After adjusting for health status, education, and smoking history, the standardized regression coefficient for age decreased 12% (βage = .20; P = .003), while the standardized coefficient for MVPA decreased only 3% (βMVPA = -.32; P < .001). CONCLUSION Study findings suggest that MVPA is strongly associated with muscle oxidative capacity, independent of age, providing mechanistic insights into the health benefits of exercise in older age. J Am Geriatr Soc 67:1695-1699, 2019.
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Affiliation(s)
- Fatemeh Adelnia
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health
- Corresponding Authors: Fatemeh Adelnia; MedStar Harbor Hospital, 3001 S. Hanover Street, 5th Floor, Baltimore, MD; Phone: 410 350 7301; ; Luigi Ferrucci; Biomedical Research Center, 251 Bayview Boulevard, Suite 100, Phone: 410-558-8110;
| | - Jacek Urbanek
- John Hopkins University School of Medicine, Department of Medicine, Division of Geriatric Medicine and Gerontology, Center on Aging and Health
| | - Yusuke Osawa
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health
| | - Michelle Shardell
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health
| | - Nicholas A. Brennan
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health
| | - Kenneth W. Fishbein
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health
| | - Richard G. Spencer
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health
| | - Eleanor M. Simonsick
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health
| | | | - Luigi Ferrucci
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health
- Corresponding Authors: Fatemeh Adelnia; MedStar Harbor Hospital, 3001 S. Hanover Street, 5th Floor, Baltimore, MD; Phone: 410 350 7301; ; Luigi Ferrucci; Biomedical Research Center, 251 Bayview Boulevard, Suite 100, Phone: 410-558-8110;
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43
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Shardell M, Semba RD, Kalyani RR, Bandinelli S, Prather AA, Chia CW, Ferrucci L. Plasma Klotho and Frailty in Older Adults: Findings From the InCHIANTI Study. J Gerontol A Biol Sci Med Sci 2019; 74:1052-1057. [PMID: 29053774 PMCID: PMC6580690 DOI: 10.1093/gerona/glx202] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [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: 04/15/2017] [Accepted: 10/16/2017] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND The hormone klotho, encoded by the gene klotho, is primarily expressed in the kidney and choroid plexus of the brain. Higher klotho concentrations have been linked to better physical performance; however, it is unknown whether klotho relates to frailty status in older adults. METHODS Plasma klotho was measured in 774 participants aged ≥65 years enrolled in InCHIANTI, a prospective cohort study comprising Italian adults. Frailty status was assessed at 3 and 6 years after enrollment. Frailty was defined as presence of at least three out of five criteria of unintentional weight loss, exhaustion, sedentariness, muscle weakness, and slow walking speed; prefrailty was defined as presence of one or two criteria; and robustness was defined as zero criteria. We assessed whether plasma klotho concentrations measured at the 3-year visit related to frailty. RESULTS Each additional natural logarithm of klotho (pg/mL) was associated with lower odds of frailty versus robustness after adjustment for covariates (odds ratio [OR] 0.46; 95% confidence interval 0.21, 0.98; p-value = .045). Higher klotho was particularly associated with lower odds of exhaustion (OR 0.57; 95% CI 0.36, 0.89; p-value = .014). Participants with higher klotho also had lower estimated odds of weight loss and weakness, but these findings were not statistically significant. CONCLUSIONS Higher plasma klotho concentrations were associated with lower likelihoods of frailty and particularly exhaustion. Future studies should investigate modifiable mechanisms through which klotho may affect the frailty syndrome.
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Affiliation(s)
- Michelle Shardell
- Translational Gerontology Branch, National Institute on Aging, Baltimore, Maryland
| | - Richard D Semba
- Wilmer Eye Institute, Johns Hopkins Medical Institutions, Baltimore, Maryland
| | - Rita R Kalyani
- Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, Maryland
| | | | - Aric A Prather
- Department of Psychiatry, University of California San Francisco, San Francisco, California
| | - Chee W Chia
- Translational Gerontology Branch, National Institute on Aging, Baltimore, Maryland
| | - Luigi Ferrucci
- Translational Gerontology Branch, National Institute on Aging, Baltimore, Maryland
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44
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Orwig D, Hochberg MC, Gruber-Baldini AL, Resnick B, Miller RR, Hicks GE, Cappola AR, Shardell M, Sterling R, Hebel JR, Johnson R, Magaziner J. Examining Differences in Recovery Outcomes between Male and Female Hip Fracture Patients: Design and Baseline Results of a Prospective Cohort Study from the Baltimore Hip Studies. J Frailty Aging 2019; 7:162-169. [PMID: 30095146 DOI: 10.14283/jfa.2018.15] [Citation(s) in RCA: 10] [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] [Indexed: 12/11/2022]
Abstract
BACKGROUND Incidence of hip fractures in men is expected to increase, yet little is known about consequences of hip fracture in men compared to women. It is important to investigate differences at time of fracture using the newest technologies and methodology regarding metabolic, physiologic, neuromuscular, functional, and clinical outcomes, with attention to design issues for recruiting frail older adults across numerous settings. OBJECTIVES To determine whether at least moderately-sized sex differences exist across several key outcomes after a hip fracture. DESIGN, SETTING, AND PARTICIPANTS This prospective cohort study (Baltimore Hip Studies 7th cohort [BHS-7]) was designed to include equal numbers of male and female hip fracture patients to assess sex differences across various outcomes post-hip fracture. Participants were recruited from eight hospitals in the Baltimore metropolitan area within 15 days of admission and were assessed at baseline, 2, 6 and 12 months post-admission. MEASUREMENTS Assessments included questionnaire, functional performance evaluation, cognitive testing, measures of body composition, and phlebotomy. RESULTS Of 1709 hip fracture patients screened from May 2006 through June 2011, 917 (54%) were eligible and 39% (n=362) provided informed consent. The final analytic sample was 339 (168 men and 171 women). At time of fracture, men were sicker (mean Charlson score= 2.4 vs. 1.6; p<0.001) and had worse cognition (3MS score= 82.3 vs. 86.2; p<0.05), and prior to fracture were less likely to be on bisphosphonates (8% vs. 39%; p<0.001) and less physically active (2426 kilocalories/week vs. 3625; p<0.001). CONCLUSIONS This paper provides the study design and methodology for recruiting and assessing hip fracture patients and evidence of baseline and pre-injury sex differences which may affect eventual recovery one year later.
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Affiliation(s)
- D Orwig
- Denise L. Orwig, PhD, University of Maryland School of Medicine, 660 West Redwood Street, Suite 200, Baltimore, MD 21201, Tel: 410-706-8951; Fax 410-706-4433;
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Adelnia F, Shardell M, Bergeron CM, Fishbein KW, Spencer RG, Ferrucci L, Reiter DA. Diffusion-weighted MRI with intravoxel incoherent motion modeling for assessment of muscle perfusion in the thigh during post-exercise hyperemia in younger and older adults. NMR Biomed 2019; 32:e4072. [PMID: 30861224 PMCID: PMC6530599 DOI: 10.1002/nbm.4072] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 05/29/2018] [Revised: 12/16/2018] [Accepted: 01/03/2019] [Indexed: 05/06/2023]
Abstract
Aging is associated with impaired endothelium-dependent vasodilation that leads to muscle perfusion impairment and contributes to organ dysfunction. Impaired muscle perfusion may result in inadequate delivery of oxygen and nutrients during and after muscle contraction, leading to muscle damage. The ability to study the relationship between perfusion and muscle damage has been limited using traditional muscle perfusion measures, which are invasive and risky. To overcome this limitation, we optimized a diffusion-weighted MRI sequence and validated an intravoxel incoherent motion (IVIM) analysis based on Monte Carlo simulation to study muscle perfusion impairment with aging during post-exercise hyperemia. Simulation results demonstrated that the bias of IVIM-derived perfusion fraction (fp ) and diffusion of water molecules in extra-vascular tissue (D) ranged from -3.3% to 14% and from -16.5% to 0.002%, respectively, in the optimized experimental condition. The dispersion in fp and D ranged from 3.2% to 9.5% and from 0.9% to 1.1%, respectively. The mid-thigh of the left leg of four younger (21-30 year old) and four older (60-90 year old) healthy females was studied using the optimized protocol at baseline and at seven time increments occurring every 3.25 min following in-magnet dynamic knee extension exercise performed using a MR-compatible ergometer with a workload of 0.4 bar for 2.5 min. After exercise, both fp and D significantly increased in the rectus femoris (active muscle during exercise) but not in adductor magnus (inactive muscle), reflecting the fact that the local increase in perfusion with both groups showed a maximum value in the second post-exercise time-point. A significantly greater increase in perfusion from the baseline (p < 0.05) was observed in the younger group (37 ± 12.05%) compared with the older group (17.57 ± 15.92%) at the first post-exercise measurement. This work establishes a reliable non-invasive method that can be used to study the effects of aging on dynamic changes in muscle perfusion as they relate to important measures of physical function.
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Affiliation(s)
- Fatemeh Adelnia
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
- Correspondence: Fatemeh Adelnia and David A. Reiter, National Institute on Aging, Baltimore, MD, USA. ;
| | - Michelle Shardell
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Christopher M. Bergeron
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Kenneth W. Fishbein
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Richard G. Spencer
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Luigi Ferrucci
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - David A. Reiter
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
- Department of Radiology & Imaging Sciences, Emory University, Atlanta, Georgia, USA
- Correspondence: Fatemeh Adelnia and David A. Reiter, National Institute on Aging, Baltimore, MD, USA. ;
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Semba RD, Zhang P, Adelnia F, Sun K, Gonzalez‐Freire M, Salem N, Brennan N, Spencer RG, Fishbein K, Khadeer M, Shardell M, Moaddel R, Ferrucci L. Low plasma lysophosphatidylcholines are associated with impaired mitochondrial oxidative capacity in adults in the Baltimore Longitudinal Study of Aging. Aging Cell 2019; 18:e12915. [PMID: 30719830 PMCID: PMC6413748 DOI: 10.1111/acel.12915] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 12/04/2018] [Accepted: 12/30/2018] [Indexed: 01/21/2023] Open
Abstract
The decrease in skeletal muscle mitochondrial oxidative capacity with age adversely affects muscle strength and physical performance. Factors that are associated with this decrease have not been well characterized. Low plasma lysophosphatidylcholines (LPC), a major class of systemic bioactive lipids, are predictive of aging phenotypes such as cognitive impairment and decline of gait speed in older adults. Therefore, we tested the hypothesis that low plasma LPC are associated with impaired skeletal muscle mitochondrial oxidative capacity. Skeletal muscle mitochondrial oxidative capacity was measured using in vivo phosphorus magnetic resonance spectroscopy (31P‐MRS) in 385 participants (256 women, 129 men), aged 24–97 years (mean 72.5) in the Baltimore Longitudinal Study of Aging. Postexercise recovery rate of phosphocreatine (PCr), kPCr, was used as a biomarker of mitochondrial oxidative capacity. Plasma LPC were measured using liquid chromatography–tandem mass spectrometry. Adults in the highest quartile of kPCr had higher plasma LPC 16:0 (p = 0.04), 16:1 (p = 0.004), 17:0 (p = 0.01), 18:1 (p = 0.0002), 18:2 (p = 0.002), and 20:3 (p = 0.0007), but not 18:0 (p = 0.07), 20:4 (p = 0.09) compared with those in the lower three quartiles in multivariable linear regression models adjusting for age, sex, and height. Multiple machine‐learning algorithms showed an area under the receiver operating characteristic curve of 0.638 (95% confidence interval, 0.554, 0.723) comparing six LPC in adults in the lower three quartiles of kPCr with the highest quartile. Low plasma LPC are associated with impaired mitochondrial oxidative capacity in adults.
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Affiliation(s)
- Richard D. Semba
- Wilmer Eye Institute Johns Hopkins University School of Medicine Baltimore Maryland
| | - Pingbo Zhang
- Wilmer Eye Institute Johns Hopkins University School of Medicine Baltimore Maryland
| | - Fatemeh Adelnia
- National Institute on Aging, National Institutes of Health Baltimore Maryland
| | - Kai Sun
- Wilmer Eye Institute Johns Hopkins University School of Medicine Baltimore Maryland
| | | | | | - Nicholas Brennan
- National Institute on Aging, National Institutes of Health Baltimore Maryland
| | - Richard G. Spencer
- National Institute on Aging, National Institutes of Health Baltimore Maryland
| | - Kenneth Fishbein
- National Institute on Aging, National Institutes of Health Baltimore Maryland
| | - Mohammed Khadeer
- National Institute on Aging, National Institutes of Health Baltimore Maryland
| | - Michelle Shardell
- National Institute on Aging, National Institutes of Health Baltimore Maryland
| | - Ruin Moaddel
- National Institute on Aging, National Institutes of Health Baltimore Maryland
| | - Luigi Ferrucci
- National Institute on Aging, National Institutes of Health Baltimore Maryland
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Osawa Y, Chiles Shaffer N, Shardell M, Studenski S, Ferrucci L. Biology of Aging II. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.359] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Y Osawa
- National Institute on Aging, NIH
| | | | | | - S Studenski
- National Institute on Aging, National Institutes of Health
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Shardell M. Nutrition and Functional Status. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.3025] [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] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Adelnia F, Shardell M, Bergeron C, Fishbein K, Spencer R, Reiter D, Ferrucci L. SKELETAL MUSCLE PERFUSION IN POST-EXERCISE HYPEREMIA IN YOUNG AND OLD ADULTS AS ASSESSED BY DIFFUSION-WEIGHTED MRI. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.385] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Rathbun A, Gallo J, Stuart E, Shardell M, Gruber-Baldini A, Orwig D, Ryan A, Magaziner J. DEPRESSIVE SYMPTOM SUBTYPES IN OLDER ADULTS AFTER HIP FRACTURE. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1893] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - J Gallo
- Johns Hopkins Bloomberg School of Public Health
| | - E Stuart
- Johns Hopkins Bloomberg School of Public Health
| | | | | | - D Orwig
- Department of Epidemiology & Public Health University of Maryland School of Medicine
| | - A Ryan
- University of Maryland School of Medicine
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