Purpose: To examine whether the potential benefits of low-dose aspirin outweigh the risks in people over age 70.
Purpose: To track changes over time among individuals with frontotemporal dementia (FTD) in the brain using imaging and other biomarkers and to compare the utility of different kinds of images.
Purpose: To determine whether intensive blood pressure lowering will reduce the incidence of all-cause dementia, reduce the decline of global cognitive function in key specific domains, and show changes in brain structure.