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J Am Geriatr Soc. 2010 Mar;58(3):551-6. doi: 10.1111/j.1532-5415.2010.02723.x. Epub 2010 Feb 16.

Depressive symptoms in middle age and the development of later-life functional limitations: the long-term effect of depressive symptoms.

Author information

  • 1Department of Medicine, University of California, San Francisco, San Francisco VA Medical Center (181G), 4150 Clement, San Francisco, CA 94121, USA. ken.covinsky@ucsf.edu

Abstract

OBJECTIVES:

To determine whether middle-aged persons with depressive symptoms are at higher risk for developing activity of daily living (ADL) and mobility limitations as they advance into older age than those without.

DESIGN:

Prospective cohort study.

SETTING:

The Health and Retirement Study (HRS), a nationally representative sample of people aged 50 to 61.

PARTICIPANTS:

Seven thousand two hundred seven community living participants in the 1992 wave of the HRS.

MEASUREMENTS:

Depressive symptoms were measured using the 11-item Center for Epidemiologic Studies Depression Scale (CES-D 11), with scores of 9 or more (out of 33) classified as significant depressive symptoms. Difficulty with five ADLs and basic mobility tasks (walking several blocks or up one flight of stairs) was measured every 2 years through 2006. The primary outcome was persistent difficulty with ADLs or mobility, defined as difficulty in two consecutive waves.

RESULTS:

Eight hundred eighty-seven (12%) subjects scored 9 or higher on the CES-D 11 and were classified as having significant depressive symptoms. Over 12 years of follow-up, subjects with depressive symptoms were more likely to reach the primary outcome measure of persistent difficulty with mobility or difficulty with ADL function (45% vs 23%, Cox hazard ratio (HR)=2.33, 95% confidence interval (CI)=2.06-2.63). After adjusting for age, sex, measures of socioeconomic status, comorbid conditions, high body mass index, smoking, exercise, difficulty jogging 1 mile, and difficulty climbing several flights of stairs, the risk was attenuated but still statistically significant (Cox HR=1.44, 95% CI=1.25-1.66).

CONCLUSION:

Depressive symptoms independently predict the development of persistent limitations in ADLs and mobility as middle-aged persons advance into later life. Middle-aged persons with depressive symptoms may be at greater risk for losing their functional independence as they age.

Comment in

PMID:
20163486
[PubMed - indexed for MEDLINE]
PMCID:
PMC2904810
Free PMC Article
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