Cognitive impairment and task-specific incident disability: Japanese cohort study

Hiroko H. Dodge, T. Kadowaki, T. Hayakawa, M. Yamakawa, A. Sekikawa, H. Ueshima

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

We examined the effect of cognitive impairment on task-specific incident disability measured by the Activities of Daily Living (ADL) and Instrumental Activities of Daily Living (IADL), in three-year follow-up of community-dwelling elderly in Azuchi, Japan. Assessing cognition with the Hasegawa Dementia Scale (HDS), we found that minimally (21≤HDS<25) or mildly (17≤IDS<21) cognitively impaired subjects had significantly higher risk of losing functional abilities compared with those with intact cognition. Cognitive impairment accounts for 11% to 36% of incident disability in ADL-IADL tasks, with the highest PAR% (Population Attributable Risk) shown for the ability to feed oneself. Even among those with intact ADL and IADL abilities, depending on the status of cognitive impairment, a significant portion of individuals lose both ADL and IADL abilities within 3 years.

Original languageEnglish (US)
Title of host publicationResearch and Practice in Alzheimer's Disease
EditorsB. Vellas, E. Giacobini
Pages184-190
Number of pages7
StatePublished - Dec 1 2006

Publication series

NameResearch and Practice in Alzheimer's Disease
Volume11
ISSN (Print)1284-8360

Keywords

  • ADL
  • Care giving needs
  • Hasegawa Dementia Scale
  • IADL
  • Population attributable risk

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Aging
  • Geriatrics and Gerontology
  • Biological Psychiatry

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  • Cite this

    Dodge, H. H., Kadowaki, T., Hayakawa, T., Yamakawa, M., Sekikawa, A., & Ueshima, H. (2006). Cognitive impairment and task-specific incident disability: Japanese cohort study. In B. Vellas, & E. Giacobini (Eds.), Research and Practice in Alzheimer's Disease (pp. 184-190). (Research and Practice in Alzheimer's Disease; Vol. 11).