From the Centers for Disease Control. Comorbidity of chronic conditions and disability among older persons--United States, 1984.
D000203:Activities of Daily Living; D000368:Aged; D002908:Chronic Disease / Q000453:epidemiology*; D015897:Comorbidity; D006233:Persons with Disabilities / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D014481:United States / Q000453:epidemiology