Inequities Gone or Enduring? Evaluating the Effects of a School-Based Antistigma Intervention on Race/Ethnic and Gender Intersectional Disparities in Mental Illness Stigma.

While significant mental illness stigma disparities across race/ethnicity and gender exist, little is known about the efficacy of anti-stigma interventions in reducing these intersectional disparities. We examine the two-year effects of school-based anti-stigma interventions on race/ethnic and gender intersectional stigma disparities among adolescents. An ethnically and socioeconomically diverse sixth grade sample ( = 302) self-completed surveys assessing stigma before randomly receiving an anti-stigma curriculum and/or contact intervention versus no intervention. Surveys were also self-completed two-years post-intervention. Stigma measures assessed general mental illness knowledge/attitudes, awareness/action, and social distance. Stigma towards peers with specific mental illnesses were examined using vignettes-two adolescent characters were described as having bipolar (Julia) and social anxiety (David) disorder. Race/ethnicity and gender were cross-classified into six intersectional groups (Latina/o, Non-Latina/o Black, and Non-Latina/o White girls and boys). Linear regressions adjusting for poverty and mental illness familiarity examined anti-stigma intervention effects across intersectional groups in sixth and eighth grade. The school-based anti-stigma intervention reduced intersectional stigma disparities over the two-year study period. While Non-Latino Black boys and Latino boys/girls reported greater disparities in stigma at baseline compared to Non-Latina White girls, these disparities (14 total) were predominantly eliminated in the two-year follow-up following receipt of the curriculum and contact components to just one remaining disparity post-intervention among Non-Latino Black boys. By identifying differences in how school-based anti-stigma interventions reduce mental illness stigma for unique race/ethnic and gender intersectional groups, we can better understand how to shape future anti-stigma interventions for diverse intersectional populations.