title: Sexual Behavior Latent Classes Among Men Who Have Sex With Men: Associations With Sexually Transmitted Infections.
abstract: Men who have sex with men (MSM) are at disproportionate risk of acquisition of sexually transmitted infections (STIs). We used latent class analysis (LCA) to examine patterns of sexual behavior among MSM and how those patterns are related to STIs. We examined patterns of sexual behavior using behavioral and clinical data from a cross-sectional study of 235 MSM who presented to an urban sexual health clinic for STI testing. Analyzed data were collected using a combination of interviewer- and self-administered surveys and electronic health records. We used LCA to identify underlying subgroups of men based on their sexual behavior, described the demographics of the latent classes, and examined the association between the latent classes and STI status. We identified three latent classes of sexual behavior: Unprotected Anal Intercourse (UAI) Only (67%), Partner Seekers (14%), and Multiple Behaviors (19%). Men in the Multiple Behaviors class had a 67% probability of being STI positive, followed by men in the UAI Only class (27%) and men in the Partner Seekers class (22%). Examining the intersection of a variety of sexual practices indicates particular subgroups of MSM have the highest probability of being STI positive.
authors.affiliation: a Department of Biobehavioral Health, The Methodology Center, College of Health and Human Development , The Pennsylvania State University.
authors.forename: Cara E
authors.initials: CE
authors.lastname: Rice
authors.affiliation: b Division of Infectious Diseases, College of Medicine, Division of Epidemiology, College of Public Health , The Ohio State University.
authors.forename: Abigail
authors.initials: A
authors.lastname: Norris Turner
authors.affiliation: c Department of Biobehavioral Health, The Methodology Center , The Pennsylvania State University.
authors.forename: Stephanie T
authors.initials: ST
authors.lastname: Lanza
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D018451:Homosexuality, Male; D006801:Humans; D008297:Male; D012725:Sexual Behavior / Q000145:classification*; D012749:Sexually Transmitted Diseases; D055815:Young Adult