Mild depressive symptoms, self-reported disability, and slowing across multiple functional domains

Area of Science:

• Gerontology
• Psychiatry
• Public Health

Background:

• Subthreshold depressive symptoms are prevalent in older adults, yet their clinical significance and impact on disability remain unclear.
• Investigating the mechanisms linking depressed mood to disability risk in this population is crucial.

Purpose of the Study:

• To compare self-reported disability and performance (cognitive, psychomotor, physical) in older adults without dementia who reported mild depressive symptoms versus those without.
• To determine if mild depressive symptoms are independently associated with functional decline in older adults.

Main Methods:

• A study of 312 community-resident older adults without dementia compared those with occasional mild depressive symptoms (anhedonia/dysphoria) to those without.
• Assessments included self-reported disability, cognitive tests (Trail B), and physical performance measures (gait speed).

Main Results:

• 35.3% of participants reported mild depressive symptoms, associated with more medical conditions and mobility problems.
• Individuals with mild depressive symptoms exhibited slower gait speed and cognitive processing.
• Regression analyses indicated subthreshold symptoms were not significant correlates of slowed performance but were linked to self-reported mobility limitations.

Conclusions:

• Mild depressive symptoms in older adults were not independently associated with objective performance decrements.
• However, mild depressive symptoms correlated with a poorer self-appraisal of mobility, independent of objective functional measures.