We surveyed participants regarding UAI with up to their three most recent sexual partners according to partner type. Participants provided information on recent male or TGW partners with whom they had engaged in insertive or receptive anal intercourse: Unprotected anal intercourse was reported with This is an open-access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Data Availability: The authors confirm that, for approved reasons, some access restrictions apply to the data underlying the findings. All data underlying our findings are included in the manuscript as submitted. Given the sensitive nature of the data collected including HIV diagnosis , our current IRB approval does not allow us to provide unrestricted access to the complete database in a public repository.
The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Competing interests: The authors have declared that no competing interests exist.
The frequency of unprotected anal intercourse UAI remains high among these populations, underscoring the need to better assess factors influencing condom use [4]. Previous research has suggested an association between partner type and sexual risk behavior in MSM and TGW partnerships [1] , [7] — [16]. While previous research has documented an association between partnership type and UAI in diverse populations worldwide [7] , [10] , [12] , [19] , [20] , few studies have investigated the relationship between partnership type and UAI among MSM and TGW in Latin America [11] , [21].
Epidemiologic studies from across Latin America have reported a higher overall prevalence of UAI with stable compared with casual partners among MSM and TGW, though we are not aware of any studies in the region that have conducted partner-level analyses of the association between UAI and partner type [2] , [3] , [22] , [23]. Detailed knowledge of how partner type influences sexual risk behavior among MSM and TGW in Latin America will contribute to the development of culturally- and epidemiologically-specific interventions to control the spread of HIV and STIs in this population.
