Purpose: This analysis was designed to characterize the pre-exposure prophylaxis (PrEP) cascade in a U.S. national sample of transgender men and trans masculine adults who have sex with cisgender men (trans MSM) at-risk for HIV acquisition. Methods: From November to December 2017, 843 HIV-negative trans MSM self-reporting past-6-month receptive sex with a cisgender man were recruited via peer referrals, dating apps, listservs, and social media. A computer-assisted self-interview assessed demographics, health care, and the PrEP cascade. Descriptive statistics and multivariable regression models evaluated factors associated with PrEP uptake and persistence. Results: Mean age was 28.1 years (standard deviation = 7.1); 4.8% were Black, 21.7% Latinx, and 25.6% another race/ethnicity. A total of 84.1% had heard of PrEP, with 67.3% reporting interest. More than half (55.2%) were PrEP indicated, of which 50.8% were PrEP naive. Approximately 1/4 (28.0%) reported PrEP use, of which 65.3% were PrEP persistent. PrEP modality preferences were injectable (51.2%), daily oral pill (22.1%), and anal gel/lube (14.6%). Reasons for PrEP noninterest were no HIV risk (68.5%), cost (24.2%), and side effects (20.1%). Surgical gender affirmation, no health care discrimination, and social media as a primary health information source were associated with increased odds of PrEP uptake and persistence (all p < 0.05). PrEP adherence difficulties were reported by 52.6%, due to busy/inconsistent schedule (53.1%), side effects (27.4%), and too many medical visits (11.6%). Conclusion: PrEP uptake was modest among the trans MSM sampled, given prevalent HIV risk behaviors. The limited PrEP uptake in at-risk trans MSM suggests the need to develop culturally tailored community education and interventions.
Keywords: HIV prevention; MSM; PrEP; transgender.