Grewal, R.; Deeks, S. L.; Hart, T. A.; Cox, J.; De Pokomandy, A.; Grennan, T.; Lambert, G.; Moore, D.; Coutlée, F.; Gaspar, M.; George, C.; Grace, D.; Jollimore, J.; Lachowsky, N. J.; Nisenbaum, R.; Ogilvie, G.; Sauvageau, C.; Tan, D. H. S.; Yeung A.; Burchell, A. N.. Human Vaccines & Immunotherapeutics. 2022. Taylor & Francis Online.
Background: Some Canadian jurisdictions offer publicly funded HPV vaccine to gay, bisexual, and other men who have sex with men (GBM) aged ≤26 years. We characterized factors associated with being in different stages of HPV vaccination.
Methods: Engage is a sexual health study of GBM in the three largest Canadian cities recruited via respondent driven sampling (RDS). We categorized participants as: (1) unaware of HPV vaccine, (2) undecided/unwilling to get vaccinated, (3) willing to get vaccinated, (4) vaccinated with one or more doses. Our RDS-II weighted analyses used multinomial logistic regression to identify factors associated with being in earlier stages of the cascade compared to Stage 4.
Results: Across the cities, 26–40%, 7–14%, 33–39%, and 13–28% were in Stages 1 to 4, respectively. Compared to Stage 4, being in earlier stages of the cascade was associated with bisexual-identification (Stage 1: adjusted odds ratio[aOR] = 2.84, 95% confidence interval[CI] = 1.06–7.62; Stage 2: aOR = 3.09, 95%CI = 1.19–8.05), having immigrated to Canada (Stage 1: aOR = 1.79, 95%CI 1.07–2.99), preference to keep same-sex romantic relationships private (Stage 1: aOR = 1.25, 95% CI = 1.05–1.48; Stage 2: aOR = 1.24, 95%CI = 1.05–1.46), not receiving sexual health information (Stage 1: aOR = 0.31, 95% CI = 0.13–0.71; Stage 2: aOR = 0.27, 95%CI = 0.12–0.64), not accessing a health-care provider (Stage 2: aOR = 0.36, 95%CI = 0.15–0.83), and no past hepatitis A/B vaccination (Stage 1: aOR = 0.16, 95% CI = 0.09–0.30; Stage 2: aOR = 0.18, 95%CI = 0.09–0.35; Stage 3: aOR = 0.38, 95%CI = 0.21–0.61).
Discussion: Interventions are needed to reduce social and financial barriers, increase sexual health knowledge, and improve GBM-competent health-care access to increase vaccine uptake among GBM.