Aim The purpose of this study is to identify psychosocial factors associated with drinking behavior among underage university students. Methods: University students under the age of twenty (N=236) completed a self-reported questionnaire. Relationships between psychosocial variables and drinking were investigated using multigroup structural equation modeling analyses. Restllts: Number of friends who drink alcohol, vigor, self-efficacy in interpersonal relationships, self-assertive efficacy against drinking, self-efficacy in overcoming difficulty,
and impulsiveness were associated with drinking
behavior. Conclusion: These findings suggest that self-assertive efficacy to resist peer pressure, self-control and mood status are potentially important factors that could be addressed by programs to prevent drinking among underage university student.