Do depressive symptoms predict declines in physical performance in an elderly, biracial population?

Area of Science:

• Gerontology
• Epidemiology
• Psychiatry

Background:

• Depressive symptoms are common in older adults and may impact physical health.
• Understanding the long-term relationship between depression and physical function is crucial for healthy aging.

Purpose of the Study:

• To investigate if depressive symptoms, measured by the Center for Epidemiological Studies Depression Scale (CES-D), predict changes in physical function over time in elderly adults.
• To examine the longitudinal association between baseline CES-D scores and physical performance decline.

Main Methods:

• A population-based sample of 4069 adults aged 65+ (61% Black, 61% female) was analyzed.
• Physical function was assessed using a summary performance measure including tandem stand, measured walk, and repeated chair stand.
• Generalized estimating equation models analyzed physical function across three assessments over 5.4 years, using baseline CES-D scores.

Main Results:

• Each 1-point increase in CES-D score was associated with a 0.34-point lower absolute physical performance level (p < .0001).
• No significant interaction between CES-D scores and time was observed (p = .84), indicating depressive symptoms did not predict greater physical decline.
• While lower CES-D scores were linked to better physical performance, the highest CES-D group showed no significant decline over time (p = .89).

Conclusions:

• A strong cross-sectional association exists between depressive symptoms and physical performance in older adults.
• Depressive symptoms at baseline did not consistently predict greater physical performance decline over 5.4 years.
• Longitudinal models are essential for accurately understanding the complex relationship between depressive symptomatology and physical health in aging populations.