Of the 82 subjects who participated in the initial portion of the study, 66 (80 percent) completed the follow-up interview 6 months after discharge. The study focused on the prevalence of sexual assault history in a sample of patients who received substance-abuse treatment, background and baseline differences in psychiatric symptoms and alcohol and other drug use, and treatment effectiveness for one model of inpatient treatment evaluated at 6 months after treatment. The prevalence of assault in the sample was 15 percent. Baseline measures show that patients in the assaulted group were more likely to have a history of suicide planning and demonstrated greater psychiatric- symptom severity as measured by the Brief Symptom Inventory. Outcome measures show that treatment was effective for both groups in psychiatric-symptom reduction and in reduction of alcohol and other drug use. Results are discussed in terms of specific treatment needs for substance-abuse patients with sexual assault histories. 2 tables, 1 figure, and 18 references