Prevalence and classification of mild cognitive impairment in the Cardiovascular Health Study Cognition Study: part 1

Arch Neurol. 2003 Oct;60(10):1385-9. doi: 10.1001/archneur.60.10.1385.


Objective: To examine the prevalence of mild cognitive impairment (MCI) and its diagnostic classification in the Cardiovascular Health Study (CHS) Cognition Study.

Design: The CHS Cognition Study is an ancillary study of the CHS that was conducted to determine the presence of MCI and dementia in the CHS cohort.

Setting: Multicenter population study.

Patients: We examined 3608 participants in the CHS who had undergone detailed neurological, neuropsychological, neuroradiological, and psychiatric testing to identify dementia and MCI.

Main outcome measures: The prevalence of MCI was determined for the whole cohort, and specific subtypes of MCI were examined in detail only at the Pittsburgh, Pa, center (n = 927). Mild cognitive impairment was classified as either MCI amnestic-type or MCI multiple cognitive deficits-type.

Results: The overall prevalence of MCI was 19% (465 of 2470 participants); prevalence increased with age from 19% in participants younger than 75 years to 29% in those older than 85 years. The overall prevalence of MCI at the Pittsburgh center was 22% (130 of 599 participants); prevalence of the MCI amnesic-type was 6% and of the MCI multiple cognitive deficits-type was 16%.

Conclusions: Twenty-two percent of the participants aged 75 years or older had MCI. Mild cognitive impairment is a heterogeneous syndrome, where the MCI amnestic-type is less frequent than the MCI multiple cognitive deficits-type. Most of the participants with MCI had comorbid conditions that may affect their cognitive functions.

Publication types

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

MeSH terms

  • Aged
  • Aged, 80 and over
  • Cardiovascular Diseases / classification
  • Cardiovascular Diseases / epidemiology*
  • Cognition Disorders / classification*
  • Cognition Disorders / epidemiology*
  • Cognition Disorders / psychology
  • Cohort Studies
  • Dementia / classification
  • Dementia / epidemiology
  • Dementia / pathology
  • Female
  • Humans
  • Longitudinal Studies
  • Magnetic Resonance Imaging
  • Male
  • Memory Disorders / classification
  • Memory Disorders / epidemiology
  • Neuropsychological Tests
  • Pennsylvania / epidemiology
  • Population
  • Psychiatric Status Rating Scales