Age of first experience of gender incongruence among transgender and non-binary individuals.

Objective: Gender incongruence (GI) is a condition in which an individual's gender identity, role, and expression differ from their assigned sex. This study aimed to evaluate when GI first arises in transgender and non-binary individuals seeking hormone therapy and their years living untreated in South Korea.

Methods: This retrospective study analyzed GI patients seeking gender-affirming hormone therapy (GAHT) or surgery between 2015 and 2021.