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This meta-analysis examines the efficacy of international HIV prevention interventions designed to reduce sexual risk behavior of men who have sex with men (MSM). We performed a comprehensive search of published and unpublished English-language reports of HIV prevention interventions that focus on MSM and evaluated changes in risky sexual behavior or biologic outcomes related to sexual risk. Data from 33 studies described in 65 reports were available as of July 2003. Studies with insufficient data to calculate effect sizes were excluded from the meta-analysis. Interventions were associated with a significant decrease in unprotected anal intercourse (odds ratio [OR] = 0.77, 95% confidence interval [CI]: 0.65-0.92) and number of sexual partners (OR = 0.85, 95% CI: 0.61-0.94) and with a significant increase in condom use during anal intercourse (OR = 1.61, 95% CI: 1.16-2.22). Interventions successful in reducing risky sexual behavior were based on theoretic models, included interpersonal skills training, incorporated several delivery methods, and were delivered over multiple sessions spanning a minimum of 3 weeks. Behavioral interventions provide an efficacious means of HIV prevention for MSM. To the extent that proven HIV prevention interventions for MSM can be successfully replicated in community settings and adapted and tailored to different situations, the effectiveness of current HIV prevention efforts can be increased.

A Meta-Analytic Review of HIV Behavioral Interventions for Reducing Sexual Risk Behavior of Men Who Have Sex With Men