PT - JOURNAL ARTICLE AU - Devon J Hensel AU - Amanda E Tanner AU - Ashley Sherrow AU - J Dennis Fortenberry TI - A longitudinal daily diary analysis of condom use during bleeding-associated vaginal sex among adolescent females AID - 10.1136/sextrans-2015-052139 DP - 2016 Aug 01 TA - Sexually Transmitted Infections PG - 337--339 VI - 92 IP - 5 4099 - http://sti.bmj.com/content/92/5/337.short 4100 - http://sti.bmj.com/content/92/5/337.full SO - Sex Transm Infect2016 Aug 01; 92 AB - Objective Sex during bleeding is a risk factor for sexually transmitted infection (STI) and other bloodborne viruses, including HIV. We examined daily predictors of adolescent women's male condom use during bleeding-associated vaginal sex.Methods Adolescent females (N=387; 14–17 years) were recruited from primary care clinics for a longitudinal cohort study of STIs and sexual behaviour. Data were daily partner-specific sexual diaries; generalised estimating equation logistic regression assessed the likelihood of condom use during bleeding-associated vaginal sex.Results Less than 30% of bleeding-associated vaginal sex events were condom protected. Condom use during these events was less likely with younger age, higher partner support, higher partner negativity or past week bleeding-associated sex with a given partner; condom use was more likely with high individual mood and past week condom use during bleeding-associated vaginal sex with a given partner.Conclusions Low condom rates during bleeding-associated vaginal sex can increase STI and bloodborne virus risk. Providers should consider integrating partner-specific and behavioural factors when they deliver sexual health messages to young women.