A comparative evaluation of substance abuse treatment III. Examining mechanisms underlying patient-treatment matching hypotheses for 12-step and cognitive-behavioral treatments for substance abuse.

This study examined several hypotheses for matching patients to 12-Step and cognitive-behavioral (CB) treatments in a multisite evaluation of VA inpatient substance abuse programs. A total of 804 male patients in five 12-Step programs, and 1069 male patients in five CB programs completed an intake, discharge, and 1-year follow-up questionnaire. The findings did not support the notion that certain patient characteristics would differentially predict better outcomes after 12-Step and CB treatment This conclusion held when the purest 12-Step and CB programs were used, and when patients who received the full dose of treatment (i.e., treatment completers) were examined separately. Process analyses of the hypothesized mechanisms underlying the patient-treatment matching effects did not yield the expected links among patient characteristics, proximal outcomes, and 1-year outcomes. Our conclusion is that there is no advantage to matching men with substance abuse problems to 12-Step or CB treatments based on the patient attributes measured here.

A comparative evaluation of substance abuse treatment IV. The effect of comorbid psychiatric diagnoses on amount of treatment, continuing care, and 1-year outcomes.

Recent surveys of the substance abuse patient population have shown a striking increase in the proportion of patients with a comorbid psychiatric disorder. In this study, patients with substance abuse and psychotic, anxiety/depressive, or personality disorders were compared with patients with only substance use disorders on treatment experiences and outcomes. Regardless of dual diagnosis status, patients generally improved on both substance use and social functioning outcomes after substance abuse treatment. At the 1-year follow-up, dually diagnosed patients, and patients with only substance use disorders, had comparable substance use outcomes. However, patients with major psychiatric disorders, specifically psychotic and anxiety/depressive disorders, fared worse on psychological symptoms and employment outcomes than did patients with personality disorders and only substance use disorders. Although there were some group differences on the amount of index treatment received and continuing care, the overall pattern of relationships between treatment variables and outcomes was comparable for the patient groups. In addition, there was no diagnostic group by treatment orientation matching effects, which indicated that the dual diagnosis patient groups improved as much in 12-Step as in cognitive-behavioral substance abuse programs.