title: Restricted activity: key indicator of decline or "just having a bad day"?.
authors.forename: E R
authors.initials: ER
authors.lastname: Marcantonio
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D006233:Persons with Disabilities / Q000706:statistics & numerical data*; D006801:Humans; D012307:Risk Factors