Health maintenance of the elderly.
D000203:Activities of Daily Living; D000368:Aged; D005190:Family; D006293:Health Promotion / Q000379:methods*; D006299:Health Services for the Aged; D006304:Health Status; D006801:Humans; D008603:Mental Health; D009017:Morbidity; D009735:Nursing Homes; D012944:Social Support