The data for this study are from the multisite, randomized clinical trial of alcohol treatment matching known as Project MATCH (Project MATCH Research Group, 1993). The trial recruited 1,726 participants with alcohol-use disorders and randomly assigned them to three individually delivered treatments: (1) cognitive–behavioral therapy (CBT; Kadden et al., 1992); (2) motivational enhancement therapy (MET; Miller et al., 1992); and (3) twelve-step facilitation (TSF; Nowinski et al., 1992). Project MATCH recruited subjects for outpatient and aftercare programs at nine clinical research sites across the United States. In the outpatient arm (n = 952), participants were recruited from the community or outpatient treatment centers. In the aftercare arm (n = 774), participants were recruited from intensive day-hospital or inpatient-treatment centers.
