Predictors of Dropout in an Outpatient Treatment for Problem Drinkers Including Cognitive-Behavioral Therapy and the Opioid Antagonist Naltrexone

Objective: This study investigated predictors of dropout in an outpatient treatment program for problem drinking that included individual cognitive-behavioral therapy combined with naltrexone. Specifically, we investigated whether sociodemographic factors, severity of alcohol dependence, history of problem drinking, or intensity of alcohol craving assessed at the beginning of the treatment predicted dropout from an outpatient program among a sample of 372 patients (65% male). We also investigated whether the effectiveness of the treatment (the change in alcohol consumption and symptoms of alcohol craving) or adherence to naltrexone was related to dropout. Method: Predictors of dropout were investigated using an analysis of covariance with the number of attended treatment sessions as an independent variable. Results: Our results demonstrated that the treatment entry factors predictive of dropout were younger age, lower severity of alcohol dependence, better ability to resist and control alcohol use, and lower obsession with alcohol. In addition, those who dropped out were more likely to begin the program by abstaining from alcohol and had lower adherence to naltrexone use than those who completed the program. The length of stay for treatment was not related to change in alcohol consumption. Conclusions: Patients with less severe alcohol-related problems may lack motivation for treatment, specifically cognitive behavioral therapy and naltrexone. These patients may benefit more from less intensive treatments.