Incidence of HIV infection and Sexually Transmitted Infections and Related Risk Factors among Very Young Men Who Have Sex with Men

INTRODUCTION:

The HIV epidemic continues to disproportionately affect men who have sex with men (MSM) in the US, with over a third of new infections in MSM occurring in younger men. Very few studies have reported on HIV and STI incidence and related risks among younger MSM, particularly among minors under 18 years of age.

METHODS:

Data analyzed herein are from a longitudinal study of HIV-risk among 450 very young MSM in Chicago ages 16-20, recruited via respondent-driven sampling and followed for two years, with annual HIV and STI testing. We report estimated cumulative HIV and STI incidence over the 24-month follow-up using Kaplan-Meier methods and evaluated associations with incident infections using Cox Proportional Hazards regression.

RESULTS:

The final analytic sample was primarily non-White (83%); median age was 19; 25% of the sample was under age 18. 26 new HIV infections were detected over 632 person-years of follow-up. HIV incidence was 4.11/100 person years (95% CI=2.80-6.04) and STI incidence was 6.22/100 person-years (95% CI=4.54-8.51). Cumulative HIV incidence over 24 months of follow-up was 7.32% (95% CI= 5.05-10.57), with higher incidence among racial/ethnic minorities. In multivariate analyses, non-White race and recent sexual partner concurrency were associated with both HIV and STI infection; HIV testing history and sex with an HIV-positive partner were associated with increased risk of HIV infection.

DISCUSSION:

High rates of incident HIV infection and STIs among very young MSM and the relationship between incidence and race/ethnicity, concurrency and partner characteristics indicate potential focal points of future intervention and the need for continued vigilance.

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By:  Garofalo R1, Hotton AL, Kuhns LM, Gratzer B, Mustanski B.

• 1Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL. USA2Northwestern University, Feinberg School of Medicine, Department of Pediatrics, Chicago, IL. USA3Division of Infectious Diseases, John H. Stroger Hospital4Howard Brown Health Center, Chicago, IL5Northwestern University, Feinberg School of Medicine, Department of Medical Social Sciences, Chicago, IL USA. 
• J Acquir Immune Defic Syndr. 2016 Jan 7.

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