A prospective follow-up of depressed elderly patients is described. The subjects, 91 men and 173 women aged 60 years or over, were diagnosed as depressed in an epidemiological study using the DSM-III criteria. One hundred ninety-nine patients suffered from dysthymic disorder. The mean duration of the follow-up was 14.9 ± 4.3 months. Outcome was not associated with sex and was good in 41% of the cases. In men, poor outcome was associated with low social participation, low frequency of visiting contacts, and poor insight into the depressive disorder. In women, poor outcome was associated with multiple depressive symptoms, depression diagnosed previous to this study, not living alone, low social participation, low self-perceived health, diurnal variation of symptoms, and the occurrence of initial insomnia, loss of libido, and hypochondriacal and compulsive symptoms. Many similarities were found in factors associated with outcome between all depressed patients and the patients whose depression was diagnosed during our epidemiological study.