Is it normal for older people to have sleep difficulties? My sister, who is 76, says it's normal. I disagree. I sleep very well, and I'm 79.
D000368:Aged; D000375:Aging; D006801:Humans; D012893:Sleep Wake Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology; D014481:United States / Q000453:epidemiology