Research Selection Bias and the Prevalence of Depressive Disorders in Psychiatric Facilities

Applied a statistical technique to correct for selection bias in estimating the prevalence of depressive disorders in community mental health centers (CMHCs). Approximately 243 Ss completed the screening instruments at 2 CMHCs. Results indicate that the prevalence of depression in total CMHC populations may approach 44% rather than the 25% derived from a censored sample. (June 1985)