The Relative Frequency of "Dementia of Unknown Etiology" Increases With Age and Is nearly 50% in Nonagenarians
Arch Neurol 57:713-719, Crystal,H.A.,et al, 2000
Diagnosis and Evaluation of Dementia
Neurol 45:211-218, Corey-Bloom,J.,et al, 1995
A Population-Based Study of Dementia in 85-Year-Olds
NEJM 328:153-158, 203-2051993., Skoog,I.,et al, 1993
Prevalence of Alzheimer's Disease in a Community Population of Older Persons
JAMA 262:2551-2556, 2591-25921989., Evans,D.A.,et al, 1989