Alcohol use, partner type, and risky sexual behavior among college students: Findings from an event-level study.

Alcohol use is prevalent among college students and may contribute to elevated rates of sexual risk taking. Using event-level data, the hypothesis that partner type would moderate the effect of alcohol consumption on condom use was tested. Sexually active college students (N=330; 67% female) reported on characteristics of their most recent sexual encounter, including partner type, alcohol use, and condom use, along with measures of sex-related alcohol expectancies, sensation seeking, and typical alcohol use. Unprotected vaginal sex (UVS) was reported by 39% of the sample and 32% reported alcohol use prior to sex. For the complete sample, UVS was just as likely for non-drinking events as for events involving alcohol use. However, for sexual encounters involving a non-steady partner, alcohol consumption was associated with an increase in UVS, whereas rates of UVS did not vary by drinking status for encounters involving a steady partner. These effects remained in analyses that controlled for sex-related alcohol expectancies, sensation seeking, and typical alcohol use. Findings confirm that the effects of alcohol vary according to the context in which it is used.