All participants were Yoruba.
Diagnosis & Evaluation Methods
A two-stage screening and diagnostic process was employed. For a detailed description of screening and diagnostic methods, please see Hendrie et al. (1995).
Hendrie HC, Ogunniyi A, Hall KS, Baiyewu O, Unverzagt FW, Gureje O, et al. Incidence of dementia and Alzheimer disease in 2 communities: Yoruba residing in Ibadan, Nigeria, and African Americans residing in Indianapolis, Indiana. JAMA. 2001 Feb 14;285(6):739-747.
Hendrie HC, Osuntokun BO, Hall KS, Ogunniyi AO, Hui SL, Unverzagt FW, et al. Prevalence of Alzheimer's disease and dementia in two communities: Nigerian Africans and African Americans. Am J Psychiatry. 1995 Oct;152(10):1485-1492.
Ogunniyi A, Hall KS, Gureje O, Baiyewu O, Gao S, Unverzagt FW, et al. Risk factors for incident Alzheimer's disease in African Americans and Yoruba. Metab Brain Dis. 2006 Sep;21(2-3):235-240.