Cognitive Decline in African Americans and Caucasians. Lead Investigator: Liping Zhao Institution : Emory University E-Mail : lzhao2@emory.edu Proposal ID : 1044 Proposal Description: We will compare the rate of cognitive decline and clinical conversion to MCI or AD in African Americans and Caucasians using cognitive tests and clinical diagnosis in the NACC data. We will also examine the risk factors related to cognitive performance and cognitive decline.