The cognitive abilities screening instrument (CASI): data from a cohort of 2524 cognitively intact elderly

Int J Geriatr Psychiatry. 1999 Oct;14(10):882-8.

Abstract

Objectives: To describe the effects of age and education for the Cognitive Abilities Screening Instrument (CASI), a 25-item test of cognitive function.

Design: Cross-sectional descriptive study of the initial enrollment in a community-based prospective cohort study.

Participants: A total of 2524 cognitively intact older adults over age 65 who were members of a major health maintenance organization, and who consented to participate in a longitudinal study.

Measurements: Summary scores for the CASI are given in the form of mean, median and percentile distributions specific for age and educational level.

Results: Based upon maximum likelihood analyses, age and education were significant (p<0.0001) predictors of total CASI score. Increased age and lower education were associated with a lower CASI score, as well as an increased spread in score distribution. Gender was also significantly related (p<0.01) to total CASI, with women having a slightly higher distribution of scores. Mean total scores ranged from CASI=82.2 (SD=9.0) in subjects aged 90-95 who had less than a high school degree to CASI=94.8 (SD=3. 8) in subjects aged 65-69 with at least a high school education.

Conclusions: Like most cognitive screening instruments, performance on the CASI in non-demented persons is influenced by age and education. The reference values for 5-year age categories described in this article should be useful for clinicians and research investigators when using the CASI as a measure of cognitive function.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Aged
  • Aged, 80 and over
  • Cognition / physiology*
  • Cohort Studies
  • Cross-Sectional Studies
  • Female
  • Follow-Up Studies
  • Humans
  • Male
  • Neuropsychological Tests*
  • Prospective Studies