IMPORTANCE Transgender and gender diverse (TGD) individuals, who have a gender identity that differs from their sex assigned at birth, are at increased risk of mental health problems, including depression, anxiety, self-injurious behavior, and suicidality, relative to cisgender peers. OBJECTIVE To examine mental health outcomes among TGD vs cisgender adolescents in residential treatment.
DESIGN, SETTING, AND PARTICIPANTSThis cohort study's longitudinal design was used to compare groups at treatment entry and discharge, and 1-month postdischarge follow-up. The setting was an adolescent acute residential treatment program for psychiatric disorders. Participants were TGD or cisgender adolescents enrolled in the treatment program. Statistical analysis was performed October 2019 to March 2021. EXPOSURE Adolescents participated in a 2-week acute residential treatment program for psychiatric disorders. MAIN OUTCOMES AND MEASURES Primary outcomes were depressive (the Center for Epidemiologic Studies Depression Scale [CES-D]) and anxiety (the Multidimensional Anxiety Scale for Children [MASC]) symptoms, and emotional dysregulation (the Difficulties in Emotion Regulation Scale [DERS]), measured at treatment entry and discharge, and postdischarge follow-up. Age of depression onset, suicidality, self-injury, and childhood trauma also were assessed at treatment entry. RESULTS Of 200 adolescent participants who completed treatment entry and discharge assessments, the mean (SD) age was 16.2 (1.5) years; 109 reported being assigned female at birth (54.5%), 35 were TGD (17.5%), and 66 (49.3%) completed 1-month follow-up. TGD participants had an earlier mean (SD) age of depression onset (