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Relation between intellectual dysfunctioning and mortality in community-residing older people
N Nakanishi1, K Tatara, K Ikeda
1Dept of Public Health, Osaka University Medical School, Japan.
Journal of the American Geriatrics Society
|May 20, 1998
Summary
Cognitive decline in older adults is linked to increased mortality risk. Even mild intellectual dysfunctioning can elevate mortality, with severe impairment posing the greatest risk in community-dwelling seniors.
Area of Science:
- Gerontology
- Public Health
- Epidemiology
Background:
- Community-residing older populations are susceptible to cognitive decline.
- Understanding factors influencing mortality in this demographic is crucial for public health initiatives.
Purpose of the Study:
- To investigate the association between intellectual dysfunctioning and mortality risk in an elderly community-based cohort.
Main Methods:
- A cohort of 1383 individuals aged 65+ was assessed for intellectual dysfunctioning using the OPCS instrument.
- Follow-up over 42 months tracked mortality, with data adjusted for health status, psychosocial factors, and demographics.
Main Results:
- Decreased survival rates were observed with declining intellectual function across age groups (65-74 and 75+).
- Severe intellectual dysfunctioning was a significant independent predictor of mortality after adjusting for covariates (aHR=1.74).
- Men exhibited lower survival rates than women across all levels of intellectual function.
Conclusions:
- Intellectual dysfunctioning is a significant risk factor for mortality in older adults living in the community.
- The OPCS assessment tool effectively identifies individuals at elevated risk.
- Public health strategies should consider cognitive health as a key determinant of longevity in the elderly.