Event-specific risk and ecological factors associated with prepartying among heavier drinking college students

► Examines drinking outcomes on occasions where prepartying did and did not occur. ► Students drank more and experienced more consequences during preparty events. ► Prepartiers who played drinking games had higher BALs and more consequences. ► Students reported more consequences when prepartying in a coed setting. ► Interventions can use BAL education to emphasize the impact of preparty drinking.