Associations between arthritis and change in physical function in u.s. retirees

Nancy A. Baker, Kamil E. Barbour, Charles G. Helmick, Matthew M. Zack, Soham Al Snih al snih

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Background: The aims of this study were to determine among retirees: the associations of arthritis with limitations in physical functions, and whether these associations changed differently with age for those with arthritis versus without arthritis. Methods: We identified retirees from the Health and Retirement Study, a nationally representative longitudinal panel study of U.S. adults ?51 years old. We calculated incidence density ratios (IDRs) using Poisson regression modeling with generalized estimating equations to estimate the associations between arthritis and limitations in four physical function measures (large muscle tasks, mobility, activities of daily living, and instrumental activities of daily living) adjusting for age, sex, race/ethnicity, marital status, education, total household income, depression, obesity, smoking, chronic conditions, physical activity, and cohort status. We examined interaction effects between arthritis and age to determine if the rate of change in physical function differed by arthritis status across age. Results: Over 8 years (2004-2012), significantly more retirees with arthritis had limitations with large muscle tasks (IDR 2.1: 95% confidence interval 1.6, 2.8), mobility (IDR 1.6: 1.2, 2.2), activities of daily living (IDR 2.2: 1.0, 4.7), and instrumental activities of daily living (IDR 3.7: 1.9, 7.4) than retirees without arthritis. Retirees with arthritis did not develop limitations in mobility, activities of daily living, and instrumental activities of daily living at a different rate as they aged compared to those without arthritis. Conclusions: Arthritis was associated with a greater prevalence of physical function limitations. Preventing limitations caused by arthritis is a key strategy to prevent disability in retirees.

    Original languageEnglish (US)
    Pages (from-to)127-133
    Number of pages7
    JournalJournals of Gerontology - Series A Biological Sciences and Medical Sciences
    Volume72
    Issue number1
    DOIs
    StatePublished - 2017

    Fingerprint

    Arthritis
    Activities of Daily Living
    Incidence
    Mobility Limitation
    Muscles
    Retirement
    Marital Status
    Longitudinal Studies
    Obesity
    Smoking
    Confidence Intervals
    Exercise
    Depression
    Education
    Health

    Keywords

    • Arthritis
    • Epidemiology
    • Functional performance
    • Public health

    ASJC Scopus subject areas

    • Aging
    • Geriatrics and Gerontology

    Cite this

    Associations between arthritis and change in physical function in u.s. retirees. / Baker, Nancy A.; Barbour, Kamil E.; Helmick, Charles G.; Zack, Matthew M.; Al Snih al snih, Soham.

    In: Journals of Gerontology - Series A Biological Sciences and Medical Sciences, Vol. 72, No. 1, 2017, p. 127-133.

    Research output: Contribution to journalArticle

    Baker, Nancy A. ; Barbour, Kamil E. ; Helmick, Charles G. ; Zack, Matthew M. ; Al Snih al snih, Soham. / Associations between arthritis and change in physical function in u.s. retirees. In: Journals of Gerontology - Series A Biological Sciences and Medical Sciences. 2017 ; Vol. 72, No. 1. pp. 127-133.
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    abstract = "Background: The aims of this study were to determine among retirees: the associations of arthritis with limitations in physical functions, and whether these associations changed differently with age for those with arthritis versus without arthritis. Methods: We identified retirees from the Health and Retirement Study, a nationally representative longitudinal panel study of U.S. adults ?51 years old. We calculated incidence density ratios (IDRs) using Poisson regression modeling with generalized estimating equations to estimate the associations between arthritis and limitations in four physical function measures (large muscle tasks, mobility, activities of daily living, and instrumental activities of daily living) adjusting for age, sex, race/ethnicity, marital status, education, total household income, depression, obesity, smoking, chronic conditions, physical activity, and cohort status. We examined interaction effects between arthritis and age to determine if the rate of change in physical function differed by arthritis status across age. Results: Over 8 years (2004-2012), significantly more retirees with arthritis had limitations with large muscle tasks (IDR 2.1: 95{\%} confidence interval 1.6, 2.8), mobility (IDR 1.6: 1.2, 2.2), activities of daily living (IDR 2.2: 1.0, 4.7), and instrumental activities of daily living (IDR 3.7: 1.9, 7.4) than retirees without arthritis. Retirees with arthritis did not develop limitations in mobility, activities of daily living, and instrumental activities of daily living at a different rate as they aged compared to those without arthritis. Conclusions: Arthritis was associated with a greater prevalence of physical function limitations. Preventing limitations caused by arthritis is a key strategy to prevent disability in retirees.",
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