Prevalence of dementia in the United States: the aging, demographics, and memory study.

Journal Article (Journal Article)

AIM: To estimate the prevalence of Alzheimer's disease (AD) and other dementias in the USA using a nationally representative sample. METHODS: The Aging, Demographics, and Memory Study sample was composed of 856 individuals aged 71 years and older from the nationally representative Health and Retirement Study (HRS) who were evaluated for dementia using a comprehensive in-home assessment. An expert consensus panel used this information to assign a diagnosis of normal cognition, cognitive impairment but not demented, or dementia (and dementia subtype). Using sampling weights derived from the HRS, we estimated the national prevalence of dementia, AD and vascular dementia by age and gender. RESULTS: The prevalence of dementia among individuals aged 71 and older was 13.9%, comprising about 3.4 million individuals in the USA in 2002. The corresponding values for AD were 9.7% and 2.4 million individuals. Dementia prevalence increased with age, from 5.0% of those aged 71-79 years to 37.4% of those aged 90 and older. CONCLUSIONS: Dementia prevalence estimates from this first nationally representative population-based study of dementia in the USA to include subjects from all regions of the country can provide essential information for effective planning for the impending healthcare needs of the large and increasing number of individuals at risk for dementia as our population ages.

Full Text

Duke Authors

Cited Authors

  • Plassman, BL; Langa, KM; Fisher, GG; Heeringa, SG; Weir, DR; Ofstedal, MB; Burke, JR; Hurd, MD; Potter, GG; Rodgers, WL; Steffens, DC; Willis, RJ; Wallace, RB

Published Date

  • 2007

Published In

Volume / Issue

  • 29 / 1-2

Start / End Page

  • 125 - 132

PubMed ID

  • 17975326

Pubmed Central ID

  • PMC2705925

Electronic International Standard Serial Number (EISSN)

  • 1423-0208

Digital Object Identifier (DOI)

  • 10.1159/000109998


  • eng

Conference Location

  • Switzerland