OBJECTIVE: Reduce college student at-risk drinking (ARD) using a Web-based brief motivational alcohol prevention/intervention called Michigan Prevention and Alcohol Safety for Students (M-PASS). PARTICIPANTS: Participants included 1,137 randomly sampled first-year college students, including 59 female, 80 white, and averaged age 18.1 years. METHODS: Intervention group participants (n = 616) attended 4 online M-PASS sessions, receiving feedback tailored to individual drinking patterns and concepts from 4 behavior change theories. Control group participants (n = 521) completed a mid-phase survey, and both groups were surveyed at baseline and posttest. RESULTS: Evidence of M-PASS's efficacy was found. The intervention was associated with advanced stage of change, lower tolerance of drinking and drink/driving, fewer reasons to drink, and use of more strategies to avoid ARD. Preliminary evidence of behavioral change was also found. Efficacy was greater for women than men. CONCLUSIONS: Web-based programs may be useful in reducing alcohol-related risk among college students. Further evaluation is needed.
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