Symptomatic treatment use and Alzheimer's disease progression in the NACC Lead Investigator: Lesley Butler Institution : F. Hoffman-La Roche E-Mail : lesley.butler@roche.com Proposal ID : 1151 Proposal Description: The overall goal of this project is to evaluate the relationship between symptomatic treatment use and progression along the Alzheimer's Disease continuum. The specific objectives are: 1. Describe the symptomatic treatment patterns by stage of disease. 2. Evaluate the relationship between symptomatic treatment use and progression from MCI to AD dementia.