title: A longitudinal daily diary analysis of condom use during bleeding-associated vaginal sex among adolescent females.
abstract: 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.
  
  
  
  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.
  
  
  
  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.
  
  
  
  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.
authors.affiliation: Section of Adolescent Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA Department of Sociology, Indiana University Purdue University-Indianapolis, Indianapolis, Indiana, USA.
authors.forename: Devon J
authors.initials: DJ
authors.lastname: Hensel
authors.affiliation: Department of Public Health Education, University of North Carolina Greensboro, Greensboro, North Carolina, USA.
authors.forename: Amanda E
authors.initials: AE
authors.lastname: Tanner
authors.affiliation: Department of Sociology, Indiana University Purdue University-Indianapolis, Indianapolis, Indiana, USA.
authors.forename: Ashley
authors.initials: A
authors.lastname: Sherrow
authors.affiliation: Section of Adolescent Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA.
authors.forename: J Dennis
authors.initials: JD
authors.lastname: Fortenberry
mesh_terms: D000293:Adolescent; D003075:Coitus; D017280:Condoms / Q000706:statistics & numerical data*; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D007196:Indiana / Q000453:epidemiology; D008137:Longitudinal Studies; D008297:Male; D008598:Menstruation; D012307:Risk Factors; D021841:Safe Sex / Q000523:psychology / Q000706:statistics & numerical data*; D012736:Sex Education / Q000592:standards; D012725:Sexual Behavior / Q000523:psychology / Q000706:statistics & numerical data*; D012747:Sexual Partners / Q000523:psychology*; D012749:Sexually Transmitted Diseases / Q000097:blood / Q000453:epidemiology / Q000517:prevention & control* / Q000635:transmission
keywords: ADOLESCENT; CONDOMS; MENSTRUAL CYCLE; SEXUAL BEHAVIOUR