Overview
This study evaluates a comprehensive transgender-tailored harm reduction service for transgender women, transgender men, and non-binary individuals engaging in chemsex or substance use in Thailand, focusing on PrEP uptake, HIV/STI outcomes, mental health, and socio-legal impacts.
Description
The iT-REX study is a prospective mixed-methods implementation study conducted at Tangerine Clinic in Bangkok, Thailand. It is part of a two-phase project using the EPIS framework to develop and implement a comprehensive harm reduction service tailored for transgender populations engaging in chemsex or substance use.
Approximately 140 HIV-negative participants aged ≥18 years will be enrolled and followed for 12 months with visits at baseline, 3, 6, 9, and 12 months. The study evaluates behavioral risks, substance use, HIV/STIs, mental health, and socio-legal outcomes. A subset of participants will undergo qualitative interviews to assess implementation outcomes such as acceptability, feasibility, and satisfaction.
Eligibility
Inclusion Criteria:
- Self-identified transgender women, transgender men, or non-binary persons
- Age ≥18 years
- HIV-negative
- Engaged in chemsex or substance use within past 12 months
- Able to provide informed consent
Exclusion Criteria:
• Inability to communicate in Thai sufficiently to complete study procedures


