Alcohol consumption and unprotected anal intercourse among Peruvian MSM: results from an STI clinic-based survey, 2007
Background: In previous studies, alcohol consumption has been associated with HIV infection in men who have sex with men (MSM). Unprotected anal intercourse (UAI) mediates this relationship as risk marker. We aim to describe and assess the relationship between alcohol consumption and UAI (insertive and receptive) among Peruvian MSM.
Methods: A convenience sample of MSM was recruited from a Lima, Peru STI clinic. Behavioral data was gathered using a computer-based self-administered interview. We used contingency tables, chi-squares, and logistic regression to explore the relationship between alcohol use prior to sex and UAI at last sex.
Results: Between May-December 2007, 537 participants were enrolled (Median age 28, Range 18-55) who self-identified as: Gay/Homosexual (37%); Heterosexual (29%); Transvestite (22%); or Bisexual (11%). Overall, 79% reported any alcohol consumption during the previous month, and 68% reported drinking prior to sex within the last 3 months. For men whose last sex partner was male or transgender (76%): 20% (95% CI 16 – 24%) reported drinking prior to sex and 35% (95% CI 30 – 40%) engaged in UAI at last sex. There was a significant difference in alcohol use and UAI at last sex between the subpopulations (p<0.001 and p<0.01, respectively). The association between alcohol consumption and UAI in the last encounter with a male or transgender sex partner was OR 2.3 (95% CI 1.4 – 3.9) and remained significant after adjusting for subpopulation, age, education, number of male partners in the past 3 months and history of compensated sex, OR 2.2 (95% CI 1.3 – 3.8).
Conclusions: Alcohol consumption among Peruvian MSM is very common and associated with UAI, even after adjusting for confounders. Further exploration of differences by sub-population is warranted. Alcohol consumption prior to sex is associated with UAI and should be prioritized in designing interventions for HIV/STI risk behavior reduction among MSM.
-Abstract available at link below-