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