Unprotected anal intercourse associated with recreational drug use among young men who have sex with men depends on partner type and intercourse role.
OBJECTIVE
The objective of this study was to measure associations of unprotected anal intercourse (UAI) and substance use by sexual partner (regular vs. casual) and role [insertive (I) vs. receptive (R)].


OBJECTIVE
The goal of this study was to identify determinants of the association of specific drugs and UAI.


METHODS
We conducted a prospective study of young men who have sex with men (MSM), 1997-2002. Odds ratios (ORs) for association of substance use and UAI during the previous year were adjusted for age and calendar year.


RESULTS
UAI was significantly associated with sexual situation-specific use of marijuana (OR, 1.43), crystal methamphetamine (OR, 1.75), ecstasy (OR, 1.88), and ketamine (OR, 2.17); global use associations were similar. Situation-specific associations with alcohol (OR, 1.93) and gamma-hydroxybutyrate (GHB; OR, 1.98) were not seen with global measures. GHB and ketamine were specifically associated with IUAI with regular partners, and methamphetamine with RUAI with casual partners.


CONCLUSIONS
Type of drug use measure, partner, and role are important determinants of the association of specific substances and UAI.
University of British Columbia, Department of Health Care and Epidemiology, and the BC Centre for Excellence in HIV/AIDS, Vancouver, British Columbia, Canada.
Melanie
M
Rusch
Thomas M
TM
Lampinen
Arn
A
Schilder
Robert S
RS
Hogg
D000328:Adult; D000428:Alcohol Drinking; D001955:British Columbia / Q000453:epidemiology; D002188:Cannabis; D015331:Cohort Studies; D015658:HIV Infections / Q000517:prevention & control*; D018451:Homosexuality, Male; D006801:Humans; D007649:Ketamine; D008297:Male; D008694:Methamphetamine; D018817:N-Methyl-3,4-methylenedioxyamphetamine; D011446:Prospective Studies; D021841:Safe Sex / Q000706:statistics & numerical data*; D012747:Sexual Partners; D019966:Substance-Related Disorders / Q000150:complications / Q000453:epidemiology*
D008694:Methamphetamine; D007649:Ketamine; D018817:N-Methyl-3,4-methylenedioxyamphetamine