title: Depression and comorbidity.
authors.forename: John T
authors.initials: JT
authors.lastname: O'Brien
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015897:Comorbidity; D003430:Cross-Sectional Studies; D003866:Depressive Disorder / Q000453:epidemiology*; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D011602:Psychophysiologic Disorders / Q000453:epidemiology / Q000523:psychology; D012737:Sex Factors; D012803:Sick Role