Sexual risk behaviors and alcohol: Higher base rates revealed using the unmatched‐count technique

Abstract HIV/AIDS is a disease whose only known prevention is behavioral. Risky sex is one of the ways in which people become infected with HIV, as well as other STDS. Estimating the base rates of risky sex and risky sex after drinking proves difficult. This study uses the unmatched‐count technique (UCT) to estimate base rates for sexual risk behaviors and sexual risk behaviors after drinking and compares the findings with those estimates found using conventional methods. UCT does not require the participant to directly answer sensitive questions, and, thus, may provide more accurate reporting than other methods. In a population of college students, the UCT revealed higher estimates of base rates for having had sex, having had sex without a condom, and having had sex without a condom after drinking than an anonymous self‐report survey. These higher estimates provide a better feel for the level of these risk behaviors, may help understand the relationship between alcohol and risky sex, and point to the need to target more interventions for condom use and condom use in the presence of drinking among college students.