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JAIDS Journal of Acquired Immune Deficiency Syndromes:
doi: 10.1097/QAI.0b013e318293f10b
Brief Report: Epidemiology and Prevention

Dose-Response Associations Between Number and Frequency of Substance Use and High-Risk Sexual Behaviors Among HIV-Negative Substance-Using Men Who Have Sex With Men (SUMSM) in San Francisco

Santos, Glenn-Milo MPH*,†; Coffin, Phillip O. MD, MIA*,‡; Das, Moupali MD, MPH*,‡; Matheson, Tim PhD*; DeMicco, Erin MPH*; Raiford, Jerris L. PhD; Vittinghoff, Eric PhD; Dilley, James W. MD§; Colfax, Grant MD*,‡; Herbst, Jeffrey H. PhD

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Abstract

Abstract: We evaluated the relationship between frequency and number of substances used and HIV risk [ie, serodiscordant unprotected anal intercourse (SDUAI)] among 3173 HIV-negative substance-using MSM. Compared with nonusers, the adjusted odds ratio (AOR) for SDUAI among episodic and at least weekly users, respectively, was 3.31 [95% confidence interval (CI), 2.55 to 4.28] and 5.46 (95% CI, 3.80 to 7.84) for methamphetamine, 1.86 (95% CI, 1.51 to 2.29) and 3.13 (95% CI, 2.12 to 4.63) for cocaine, and 2.08 (95% CI, 1.68 to 2.56) and 2.54 (95% CI, 1.85 to 3.48) for poppers. Heavy alcohol drinkers reported more SDUAI than moderate drinkers [AOR, 1.90 (95% CI, 1.43 to 2.51)]. Compared with nonusers, AORs for using 1, 2, and ≥3 substances were 16.81 (95% CI, 12.25 to 23.08), 27.31 (95% CI, 18.93 to 39.39), and 46.38 (95% CI, 30.65 to 70.19), respectively. High-risk sexual behaviors were strongly associated with frequency and number of substances used.

© 2013 by Lippincott Williams & Wilkins

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