Demographics, health history, blood data, imaging data, and cognitive testing Lead Investigator: Wesley Horton Institution : Georgetown University E-Mail : wah46@georgetown.edu Proposal ID : 785 Proposal Description: the principle aim is to create a well trained algorithm for predicting one APOE4 allele in cognitively normal patients, MCI patients, and AD patients. Utilizing prior research in risk factors for Alzheimer's and cognitive complaints, this study will train an algorithm using demographics, health history, blood data, imaging data, and cognitive testing to predict the APOE4 allele.