A School-Based Intervention for Mental Illness Stigma: A Cluster Randomized Trial.

Objectives: To determine the effectiveness of a school-based curriculum, Eliminating the Stigma of Differences (ESD), in improving attitudinal and/or behavioral contexts regarding mental illness in schools and increasing the likelihood that youth seek treatment for mental health problems when needed.

Methods: We conducted a cluster randomized trial in sixth-grade classes from 14 schools in 2011 and 2012 with follow-up at 6-month intervals through 24 months (2012-2015). Using a fully crossed 2 × 2 × 2 factorial design, we compared ESD to a no-intervention control and to 2 comparator interventions: (1) contact with 2 young adults with a history of mental illness and (2) exposure to antistigma printed materials. We implemented interventions in classrooms in an ethnically and socioeconomically diverse school district. There were 416 youth who participated in the follow-up, and 312 (75%) of these participated for the full 2 years. Outcome measures were knowledge and positive attitudes, social distance from peers with mental illness, and mental health treatment seeking.

Results: Youth assigned to ESD reported greater knowledge and positive attitudes and reduced social distance (Cohen's d = 0.35 and 0.16, respectively) than youth in the comparator interventions and no-intervention groups across the 2-year follow-up. Youth with high levels of mental health symptoms were more likely (odds ratio = 3.51; confidence interval = 1.08-11.31) to seek treatment during follow-up if assigned to ESD than if they were assigned to comparator interventions or no intervention.

Conclusions: ESD shows potential for improving the social climate related to mental illnesses in schools and increasing treatment seeking when needed. ESD and interventions like it show promise as part of a public mental health response to youth with mental health needs in schools.