title: Sleep disorder tied to declining function.
mesh_terms: D000375:Aging / Q000502:physiology*; D002318:Cardiovascular Diseases / Q000453:epidemiology; D015897:Comorbidity; D018450:Disease Progression; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D012148:Restless Legs Syndrome / Q000453:epidemiology / Q000503:physiopathology*; D012720:Severity of Illness Index