Journal
ARCHIVES OF INTERNAL MEDICINE
Volume 160, Issue 20, Pages 3074-3080Publisher
AMER MEDICAL ASSOC
DOI: 10.1001/archinte.160.20.3074
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Funding
- NIA NIH HHS [N01-AG-02107] Funding Source: Medline
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Background: Late-life depression affects physical health and impedes recovery from physical disability. But whether milder symptoms that occur frequently in the general population increase the risk of developing a disability or decrease the likelihood of recovery remains unclear. Objective: To examine the effect of mild symptoms of depression, assessed by a reduced version (10 items, ranging from 0-10) of the:Center for Epidemiological Studies-Depression Scale, on the course of physical disability, assessed by items from the Katz Activities of Daily Livinag Scale, the Rosow-Breslau Functional Health Scale, an the Nagi Index. Methods: A population-based longitudinal study was conducted, with 6 follow up interviews of 3434 community-dwelling persons aged 65 years and older in East Boston, Mass. Results: The likelihood of becoming disabled increased with each additional symptom of depression (for the Katz measure: odds ratio, 1.16 per symptom; 95% confidence interval, 1.13-1.19; for the Rosow-Breslau measure: odds ratio, 1.14; 95% confidence interval, 1.111.16; and for the Nagi measure: odds ratio, 1.17; 95% confidence interval, 1.14-1.19). As the number of depressive symptoms increased, the likelihood of recovering from a physical disability decreased (for the Katz measure: odds ratio, 0.96; 95% confidence interval, 0.93-0.99; for the Rosow-Breslau measure: odds ratio, 0.86; 95% confidence interval, 0.84-0.89; and for the Nagi measure: odds ratio, 0.89; 95% confidence interval, 0.87-0.91). This effect was not accounted for by age, sex, level of educational attainment, body mass index, or chronic health conditions. Conclusion: Mild depressive symptoms in older persons (those aged greater than or equal to 65 years) are associated with an increased likelihood of becoming disabled and a decreased chance of recovery, regardless of age, sex, and other factors that contribute to physical disability.
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