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Cognitive functioning predicts survival in the elderly.

Kevin Duff1, James W Mold, Yori Gidron

  • 1University of Iowa, Iowa City, IA, USA.

Journal of Clinical and Experimental Neuropsychology
|July 9, 2008
PubMed
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Cognitive function predicts survival in older adults. Poorer performance on the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) Coding subtest independently predicted death in a 4-year study.

Area of Science:

  • Neuropsychology
  • Gerontology
  • Public Health

Background:

  • Aging is associated with cognitive decline.
  • Previous research identified cognitive function as a predictor of survival.
  • Few studies have investigated specific cognitive domains predicting mortality.

Purpose of the Study:

  • To identify which specific cognitive abilities, assessed by the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS), predict mortality in older adults.
  • To examine the predictive value of 12 RBANS subtests for death in a primary care population.

Main Methods:

  • A cohort of 796 older, primary care patients was assessed using the 12 subtests of the RBANS.
  • Participants were followed for 4 years to determine survival status.

Related Experiment Videos

  • Multivariate analysis was used to identify independent predictors of death.

    • Main Results:

    • Individuals who died performed significantly worse on 9 of the 12 RBANS subtests at baseline compared to survivors.
    • The RBANS Coding subtest was an independent predictor of death.
    • Male gender and higher initial medical comorbidity also predicted mortality.

    Conclusions:

    • Cognitive function, particularly performance on the RBANS Coding subtest, is a significant predictor of mortality in older adults.
    • The underlying mechanisms linking cognitive decline and impending death require further investigation.
    • Findings suggest potential for cognitive assessments in predicting health outcomes in aging populations.