Cognitive impairment in older adults without dementia: clinical and pathologic outcomes in a community-based sample

J Geriatr Psychiatry Neurol. 2009 Dec;22(4):256-65. doi: 10.1177/0891988709335796. Epub 2009 May 11.

Abstract

This study examines clinical and neuropathologic characteristics of 37 participants in a community-based dementia series who had cognitive complaints at enrollment but did not meet dementia criteria. Participants had neuropsychological testing, were followed until death, and underwent autopsy. Twenty-four participants progressed to dementia, and their baseline characteristics were analyzed. Of the 24, 13 met criteria for neuropathologic Alzheimer disease (AD). The 13 participants who progressed to neuropathologic AD (mean intake age 78.5 +/- 7.7, mean enrollment 6.4 +/- 2.1 years) performed worse than the 11 who progressed to neuropathologic non-AD dementias (mean intake age 79.0 +/- 6.0, mean enrollment 6.0 +/- 3.2 years) on baseline Wechsler Memory Scale (WMS) delayed logical memory (3.4 +/- 2.9 vs 6.3 +/- 3.9, P = .05) and delayed visual reproduction (1.4 +/- 2.1 vs 3.1 +/- 2.7, P = .02). These observations are consistent with the view that nondemented patients with underlying AD may be more likely to present with memory than nonmemory cognitive impairment.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Aged
  • Aged, 80 and over
  • Alzheimer Disease / diagnosis
  • Alzheimer Disease / pathology
  • Brain / pathology*
  • Cognition Disorders / diagnosis*
  • Cognition Disorders / pathology*
  • Dementia / diagnosis*
  • Dementia / pathology*
  • Disease Progression
  • Female
  • Humans
  • Male
  • Neuropsychological Tests
  • Registries