Table 1. Unique inclusion criteria for each research phase.

Research activity	Unique inclusion criteria (all phases require English proficiency and gender identity different than assigned sex at birth)
Phase 1: TNG YAB	•Age 16–21. History of DEBs
Phase 2: Individual interviews on facilitators and barriers to research participation	•Age 12–21
Phase 3a: Focus groups on DEBs among TNG youth to develop a DEBs measure	•Age 12–21 History of DEBs
Phase 3b: Cognitive interviews to test DEBs measure items	•Age 12–21
Phase 4: Surveys for DEBs measure evaluation	•Age 12–21