HIV Testing and PrEP Use Among Trans and/or Non-binary Participants in the TASG Study, a Participatory Study in Germany.

HIV testing and pre-exposure prophylaxis (PrEP) are recommended in Germany for individuals at increased HIV risk. However, data on HIV testing, PrEP use, and PrEP knowledge among trans and non-binary people are limited. We analysed data from the 'Sexuelle Gesundheit in trans und nicht-binären Communitys' (TASG) study, a participatory study on HIV/STI and sexual health among trans and non-binary people in Germany. The study was designed, promoted, and analysed with active involvement of community members. Participants were invited to complete an anonymous online survey between 1 March and 1 July 2022. The outcomes included HIV testing within the last 5 years, PrEP use, and PrEP-specific knowledge. Predictors for HIV testing were identified using a bootstrap stepwise selection procedure. Among 2468 HIV-negative participants with information on potential HIV risks, 21.5% had potential needs for HIV testing and PrEP. Of these, only 44.3% (208/470, missing: 60) reported testing for HIV within the last 5 years. Older participants, those living in larger cities, and those with higher education levels were more likely to have tested for HIV. Additionally, only 8.3% (38/459, missing: 71) reported ever using PrEP. Among 451 participants with potential PrEP needs (missing: 79), only 57.4% knew at least one of three key PrEP-related facts at the time of the survey. Our findings highlight substantial gaps in HIV testing and prevention among trans and non-binary individuals in Germany with potential needs for these services. Reducing barriers to testing and prevention is essential to enable broader access to these critical services.