The effect of alcohol and substance abuse on the course of bipolar affective disorder.

It has been found that > 60% of bipolar I and almost 50% of bipolar II patients have a history of substance abuse (Regier et al., 1990). While previous studies have examined comorbidity of bipolar disorder and substance abuse, little has been done to examine the effect of substance abuse on the course of bipolar disorder. There has also been little distinction made between bipolar disorder occurring prior to substance abuse and that occurring after the onset of substance abuse. Given the high prevalence of substance abuse in bipolar patients, it would be useful to determine more about the effect of substance abuse on demographic and clinical features and on the course of illness. We attempted to do this with a retrospective chart review of 188 bipolar patients seen by D.L. Dunner between January 1992 and December 1993. Demographic and clinical information as well as information about course of illness were systematically extracted from the charts. We compared the means and percentages of these variables and analysed them for significance. Preliminary results show differences in demographics, clinical features and course of illness between patient groups. These differences may illustrate the clinical effects of substance abuse on the course of bipolar disorder. Our results also indicate that there are differences between patients whose bipolar disorder began prior to and those whose disorder began after the onset of substance abuse.