Prognostic effect of the variable course of alcoholism on the 10-year course of depression

Abstract
OBJECTIVE: The purpose of this study was to examine the predictive effect of the clinical activity of patients' alcohol use on the course of major depressive disorder. METHOD: One hundred seventy-six probands with Research Diagnostic Criteria (RDC) diagnoses of both major depressive disorder and alcoholism were compared to 412 probands with major depressive disorder only by using 10 years of short-interval, prospective follow-up data collected as part of the National Institute of Mental Health Collaborative Depression Study. The course of depression was examined by using intensity analysis to represent transitions between states of major depressive disorder. The effect of patients' RDC alcoholism status on the long-term course of major depressive disorder was examined by stratifying the analyses by three levels of alcoholism--never alcoholic, not meeting criteria for current alcoholism, and current alcoholism. RESULTS: Depressed probands who were either never alcoholic or currently nonactive alcoholic had...