Additional psychiatric illness by Diagnostic Interview Schedule in male alcoholics.

Seventy-four male veterans entering an alcohol abuse treatment program were screened for additional psychiatric diagnoses using the Diagnostic Interview Schedule (DIS). Fifty-four of these also completed a questionnaire on personal and family drinking history. Over half (54.1%) had another diagnosis. The most common syndromes other than substance abuse were antisocial personality disorder, phobic disorder, and depression. In each of these cases, the presence of the additional disorder accelerated the course of the alcohol problem significantly. The difference in course between syndromes was dwarfed by the time of presentation by the difference between "pure" alcoholism and alcoholism with another diagnosis. The primary versus secondary distinction appeared to account for only a part of this effect.