The epidemiology of depression. An update on sex differences in rates.

ABSTRACT

Data from the New Haven, CT, Standard Metropolitan Statistical Area, site of the NIMH Epidemiologic Catchment Area (ECA) study, a multi-site collaborative community survey of psychiatric disorders is presented. The 6-month prevalence rates based on the Diagnostic Interview Schedule (DIS) interview and the DSM-III found that major depression was more frequent in women than men (2.41). The sex ratios for bipolar disorder were about equal. The sex ratios for major depression were fairly consistent at different time periods retrospectively assessed. There appeared to be a birth cohort effect with cohort's born after 1936 having an earlier age of onset and higher rates of major depression but not a change in sex ratios. These findings must be considered in light of the methodologic limitations of retrospective recall.