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Understanding Potential HIV Exposure in MSM Population

This study investigates the factors linked to potential exposure to and transmission of HIV among men who have sex with men (MSM), emphasizing the significance of risky sexual behavior in HIV risk assessment. The research was conducted through a telephone survey in Seattle in 2003, involving 412 MSM participants. The results highlight the importance of targeting prevention efforts towards high-risk MSM subgroups.

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Understanding Potential HIV Exposure in MSM Population

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  1. Factors Associated with Potential Exposure to and Transmissionof HIV in a Probability Sample of Men Who Have Sex with Men Devon D. Brewer Matthew R. Golden H. Hunter Handsfield

  2. Potential exposure to/transmission of HIV (UAI w/ serodiscordant/unknown status partner) is a better measure of HIV risk in MSM than undifferentiated UAI • best predictor of new HIV diagnosis in Seattle STD patients (Golden et al.) • only sexual behavior that distinguishes STD patients from general pop. (Brewer et al.) • Goal: examine level of and correlates of potential exposure to/transmission of HIV in a probability sample of MSM

  3. Random digit dial telephone survey in areas of high MSM prevalence, Seattle, 2003 • MSM = sex with male since age 14 • at least 8 contact attempts, anonymous • 412 MSM included • response rate = 46% (of estimated # of MSM households dialed) • M interview length = 13 mins (range 3-28)

  4. Analysis based on 311 MSM who had 1+ male sex partners in last 12 months • 16% were HIV+ • of HIV- MSM, 10% potentially exposed to HIV (UAI with HIV+/unknown status man) • of HIV+ MSM, 31% were potential transmitters (UAI with HIV-/unknown status man)

  5. 1.2 0.4 0.4 0.6 0.4 % 2.1 ORs above bars

  6. 6.2* 1.0 % 4.4* 8.0* 2.0 ORs above bars 5.8*

  7. 9.1* 0.5 % ORs above bars 1.2

  8. 1.9 0.8 0.3 2.7 % 0.8 ORs above bars

  9. 1.2 3.1 0.6 % 1.4 1.6 ORs above bars

  10. 0.7 0.3 % 4.8 ORs above bars

  11. Most MSM at relatively low risk for HIV acquisition/transmission Potentially exposed = definable subset of HIV- MSM; potential transmitters less easily characterized among HIV+ MSM Strongest correlates of potential exposure same as correlates of prevalent HIV infection (Brewer et al.) Results suggest prevention efforts in MSM should be focused on STD cases, baths patrons, and meth/poppers/viagra users

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