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Cognitive scores, even within the normal range, predict death and institutionalization
Philip D St John1, Patrick R Montgomery, Betsy Kristjansson
1University of Manitoba, Health Sciences Centre, GE545-820 Sherbrook Street, Winnipeg, MB R3A 1R9, Canada. pstjohn@exchange.hsc.mb.ca
Age and Ageing
|September 21, 2002
Summary
Cognitive test scores within the normal range can predict mortality and institutionalization in seniors. Even slightly lower scores in the normal range indicate increased risk, warranting closer clinical attention.
Area of Science:
- Gerontology
- Cognitive Science
- Public Health
Background:
- Dementia is a known predictor of mortality and institutionalization.
- The predictive value of cognitive function within the normal range for adverse outcomes is less understood.
Purpose of the Study:
- To investigate if higher cognitive test scores predict mortality or institutionalization.
- To determine if this association is independent of potential confounding factors.
Main Methods:
- Secondary analysis of the Canadian Study of Health and Aging, a population-based longitudinal study.
- Included 9008 community-dwelling seniors in Canada, followed for five years.
- Assessed cognitive function using the Mini-Mental State Examination (MMSE), alongside other health and demographic variables.
Main Results:
- Mini-Mental State Examination (MMSE) scores significantly predicted mortality and institutionalization.
- Adjusted odds ratios indicated that higher MMSE scores were associated with lower risk.
- This predictive effect was observed even among participants with scores considered within the normal cognitive range.
Conclusions:
- Lower scores within the normal cognitive range are predictive of adverse outcomes in seniors.
- Clinical attention and follow-up are recommended for individuals with low-normal cognitive scores.
- Further research is needed to identify targeted interventions to reduce mortality and institutionalization risks.