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Everyday functioning in mild cognitive impairment and its relationship with executive cognition
1Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
International Journal of Geriatric Psychiatry
|August 4, 2009
Summary
Mild cognitive impairment (MCI) affects daily functioning in all subtypes. Working memory is linked to these impairments, but overall cognitive measures explain more variance in functional status.
Area of Science:
- Neuroscience
- Gerontology
- Cognitive Psychology
Background:
- Mild cognitive impairment (MCI) increases dementia risk in the elderly.
- MCI is associated with functional impairments in daily life.
- Executive functions are crucial for maintaining independence in older adults.
Purpose of the Study:
- To investigate how executive cognition domains impact everyday functioning in individuals with MCI.
- To compare functional impairments across different MCI subtypes.
- To identify specific executive functions related to daily living difficulties in MCI.
Main Methods:
- 124 MCI patients and 68 controls underwent cognitive screening.
- MCI patients were classified into four subtypes based on cognitive profiles.
- Executive functions (planning, working memory, judgment) and everyday functioning were assessed.
Main Results:
- All MCI subtypes exhibited greater everyday activity difficulties than controls.
- Multiple domain MCI patients showed more significant functional impairments than single domain MCI.
- Working memory was the only executive function significantly associated with functional status, after adjustments.
Conclusions:
- Functional abilities are impaired across all MCI subtypes.
- Working memory deficits may contribute to functional decline in MCI.
- General cognitive measures explain a larger portion of the variance in functional status than specific executive functions.
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