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Knowledge of viral load, PrEP, and HIV-related sexual risk among men who have sex with men in the Waterloo region

Abstract:Gay, bisexual, and other men who have sex with men (GBMSM) remain most disproportionately affected by HIV in Canada. HIV-related sexual risk behaviours have been linked to high HIV risk among GBMSM, but prior research has not focused on knowledge of viral load, and the risk it presents for HIV acquisition. The purpose of this study was to explore the relationship between HIV-related sexual risk behaviour and knowledge of viral load among GBMSM. A cross-sectional survey was conducted using a convenience sample of individuals age 16 and older who self-identified as LGBTQ and lived, worked, or resided in the Waterloo region, an urban-rural area in southwestern Ontario (N = 526). Responses were analyzed from those identifying as GBMSM (N = 269). Logistic regression models were created to explore sociodemographic, outness, social support, and HIV-related sexual risk variables associated with knowledge of viral load. Multivariable regression models were built to explore the same associations while controlling for confounders. HIV risk was not associated with knowledge of viral load in bivariate or multivariable analyses. Point estimates for low/negligible (odds ratio [OR] 1.10; 95% CI 0.46–2.51) and high risk (OR 1.88; 95% CI 0.68–5.20) suggest trends of higher knowledge with increased HIV risk. Men who engage in sexual risk behaviour may have increased sexual health literacy and awareness of biomedical interventions (e.g., pre-exposure prophylaxis, or PrEP) that reduce HIV risk. Policies are needed that promote acceptance of sexual orientation, improve awareness and access to PrEP, and ensure optimal delivery of HIV education to at-risk groups prior to engagement in higher risk activities.