Cognition and daily activities in a general population sample aged +55

Area of Science:

• Gerontology
• Cognitive Science
• Public Health

Background:

• Disability in older adults is a significant public health concern.
• Understanding the relationship between specific cognitive functions and disability is crucial for targeted interventions.
• The Mini-Mental State Examination (MMSE) is a widely used tool for assessing cognitive function.

Purpose of the Study:

• To examine the association between individual cognitive domains assessed by the MMSE and disability in basic and instrumental activities of daily living (bADL/iADL).
• To investigate these associations in older adults with normal cognition and those with cognitive impairment.

Main Methods:

• Cross-sectional study of a population-based cohort aged 55 years and older (n=4,803).
• Participants were categorized into cognitively normal (CNR) (n=4,057) and cognitively impaired (CI) (n=746) groups.
• Cognitive domains (orientation, attention, language) were measured using the MMSE, and disability was assessed using the Katz Index (bADL) and Lawton and Brody Scale (iADL).

Main Results:

• MMSE-orientation was associated with bADL/iADL disability and reduced social participation in both CNR and CI groups.
• MMSE-attention was linked to iADL disability exclusively in the CNR group.
• MMSE-language was associated with bADL/iADL disability and reduced social participation, but only in the CI group.

Conclusions:

• Cognitive orientation shows a consistent association with disability and social participation across different cognitive statuses in older adults.
• Specific cognitive domains like attention and language have differential associations with disability depending on cognitive status.
• Findings highlight the importance of assessing specific cognitive domains for understanding disability and informing public health strategies in aging populations.