The epidemiology of dysthymia in five communities: rates, risks, comorbidity, and treatment

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Abstract
Data from a survey of five U.S. communities showed that dysthymia affected approximately 3% of the adult population. It was more common in women under age 65, unmarried persons, and young persons with low income and was associated with greater use of general health and psychiatric services and psychotropic drugs. Dysthymia had a high comorbidity with other psychiatric disorders, particularly major depression; only about 25-30% of cases occur over a lifetime in the absence of other psychiatric disorders. The findings suggest that although the onset and highest risk periods of major depression and bipolar disorder are in young adulthood, a residual state of dysthymia occurs in middle and old age.