title: Event-Level Analysis of Anal Sex Roles and Sex Drug Use Among Gay and Bisexual Men in Vancouver, British Columbia, Canada.
abstract: This study analyzed event-level partnership data from a computer-assisted survey of 719 gay and bisexual men (GBM) enrolled in the Momentum Health Study to delineate potential linkages between anal sex roles and the so-called "sex drugs," i.e., erectile dysfunction drugs (EDD), poppers, and crystal methamphetamine. Univariable and multivariable analyses using generalized linear mixed models with logit link function with sexual encounters (n = 2514) as the unit of analysis tested four hypotheses: (1) EDD are significantly associated with insertive anal sex roles, (2) poppers are significantly associated with receptive anal sex, (3) both poppers and EDD are significantly associated with anal sexual versatility, and (4) crystal methamphetamine is significantly associated with all anal sex roles. Data for survey respondents and their sexual partners allowed testing these hypotheses for both anal sex partners in the same encounter. Multivariable results supported the first three hypotheses. Crystal methamphetamine was significantly associated with all anal sex roles in the univariable models, but not significant in any multivariable ones. Other multivariable significant variables included attending group sex events, venue where first met, and self-described sexual orientation. Results indicate that GBM sex-drug use behavior features rational decision-making strategies linked to anal sex roles. They also suggest that more research on anal sex roles, particularly versatility, is needed, and that sexual behavior research can benefit from partnership analysis.
authors.affiliation: BC Centre for Excellence in HIV/AIDS, Vancouver, BC, Canada.
authors.forename: Ashleigh J
authors.initials: AJ
authors.lastname: Rich
authors.affiliation: BC Centre for Excellence in HIV/AIDS, Vancouver, BC, Canada.|Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada.
authors.forename: Nathan J
authors.initials: NJ
authors.lastname: Lachowsky
authors.affiliation: BC Centre for Excellence in HIV/AIDS, Vancouver, BC, Canada.
authors.forename: Zishan
authors.initials: Z
authors.lastname: Cui
authors.affiliation: BC Centre for Excellence in HIV/AIDS, Vancouver, BC, Canada.
authors.forename: Paul
authors.initials: P
authors.lastname: Sereda
authors.affiliation: BC Centre for Excellence in HIV/AIDS, Vancouver, BC, Canada.
authors.forename: Allan
authors.initials: A
authors.lastname: Lal
authors.affiliation: BC Centre for Excellence in HIV/AIDS, Vancouver, BC, Canada.|Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada.
authors.forename: David M
authors.initials: DM
authors.lastname: Moore
authors.affiliation: BC Centre for Excellence in HIV/AIDS, Vancouver, BC, Canada.|Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, Canada.
authors.forename: Robert S
authors.initials: RS
authors.lastname: Hogg
authors.affiliation: Department of Anthropology, Centre for Addictions Research of British Columbia, University of Victoria, Victoria, BC, Canada. ericroth@uvic.ca.|Centre for Addictions Research of British Columbia, University of Victoria, P.O. Box 3050 STN CSC, Victoria, BC, V8W 3P5, Canada. ericroth@uvic.ca.
authors.forename: Eric A
authors.initials: EA
authors.lastname: Roth
mesh_terms: D000328:Adult; D001727:Bisexuality / Q000706:statistics & numerical data*; D001955:British Columbia / Q000453:epidemiology; D018451:Homosexuality, Male / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D008694:Methamphetamine; D008875:Middle Aged; D012725:Sexual Behavior / Q000706:statistics & numerical data*; D019966:Substance-Related Disorders / Q000453:epidemiology*
chemical_list: D008694:Methamphetamine
keywords: Anal sex roles; Event-level data; Gay and bisexual men; Sexual partnerships; Substance use