ALSPAC birth-cohort data were analysed to assess prospective associations between childhood gender nonconformity (CGN), childhood/adolescent abuse, and adulthood PTSD symptoms. Structural equation models assessed whether abuse mediated the relationship between CGN and PTSD. Sex and sexual orientation differences were investigated. For females, higher parent-rated CGN at 30, 42 and 57-months was associated with mother-reported abuse, self-reported physical/psychological abuse, and/or self-reported sexual abuse. Higher CGN at 30-months was associated with more PTSD symptoms at 23 years. Self-rated CGN in males and females, and parent-rated CGN in males, were not associated with abuse or PTSD. Sexual minority identification was associated with higher CGN and abuse and for females, PTSD symptoms. In females, the relationship between greater CGN at 30-months and PTSD symptoms was separately mediated by each abuse variable. Self-reported sexual abuse was no longer a significant mediator after sexual orientation adjustment. Self-reported physical/psychological abuse significantly mediated the association alone when it was entered together with mother-reported abuse, even after sexual orientation adjustment. In conclusion, childhood gender nonconformity in females may increase the risk for adult PTSD symptoms, possibly mediated by childhood abuse. In females, mediation of the relationship between CGN and PTSD by sexual abuse may be particularly relevant for sexual minority individuals.
Keywords: Gender nonconformity; childhood abuse; post-traumatic stress disorder; prospective; sexual orientation.