Transgender and nonbinary young adults' depression and suicidality is associated with sibling and parental acceptance-rejection.

INTRODUCTION: Transgender and nonbinary young adults (TNB YA) report high rates of depression and more suicidality than their cisgender counterparts. Parental rejection is a known predictor of worse mental health among TNB YA; however, less is known about TNB YA experiences of sibling acceptance-rejection. The purpose of this study was to determine how TNB YA perception of sibling and parental acceptance-rejection are related to TNB YA depression and suicidality. DESIGN: Cross-sectional. METHODS: TNB YA (ages 18-25) who had disclosed their gender identity to an adult sibling were recruited to take part in an online study and completed measures of sibling and parent acceptance-rejection, depression, as well as lifetime and past year suicidality. Stepwise regressions were conducted to evaluate associations between acceptance-rejection and TNB YA depression and suicidality. RESULTS: The sample consisted of 286 TNB YA (Mage = 21.5, SD = 2.2) who were predominantly White (80.6%) and assigned female sex at birth (92.7%). Each family member's acceptance-rejection was associated with increased TNB YA depression scores when considered independently and combined. Independently, high rejection from each family member was associated with greater odds of reporting most suicidality outcomes. When all family members were considered together, only high rejection from a male parent was associated with four times greater odds of reporting lifetime suicidality. High rejection from both parents was associated with greater odds of reporting past year suicide attempt (OR: 3.26 female parent; 2.75 male parent). CONCLUSION: Rejection from family members is associated with worse depression and suicidality, and rejection from male parents may be particularly damaging. Sibling acceptance uniquely contributes to TNB YA's depression symptoms alone and in the context of parental support.