Differences in Patterns of Alcohol Use and Sexual Risk-Taking Behaviours Among Sexually Active Australian and Overseas-Born Domestic and International University Students in Australia.

Alcohol use has been linked to sexual risk-taking behaviour, particularly among young people in Australia, who are also substantially represented in sexually transmissible infection (STI). While research on alcohol use and sexual risk-taking among university students in Australia exists, no studies outside recent Tertiary Students Sexual and Reproductive Health Survey (TSSHS) publications have distinguished between Australian-born and overseas-born domestic students, despite evidence that migrant populations may show different alcohol use and sexual behaviour patterns. Using data from the TSSHS and a cross-sectional anonymous online survey of university-enrolled students, this study is the first to compare sexually active Australian-born domestic, overseas-born domestic, and international students on alcohol use and sexual risk-taking. Findings align with past research, with Australian-born domestic students being more likely to consume alcohol at high-risk levels than international and overseas-born domestic students. Differences in sexual risk-taking behaviours between the three enrolment groups were fully mediated by harmful alcohol use, indicating an indirect effect between group membership and sexual risk-taking. Age moderated this mediation, with the association between harmful drinking and sexual risk-taking strongest among students aged 20-24, compared with younger and older groups.