Effectiveness of programs for reducing the stigma associated with mental disorders. A meta-analysis of randomized controlled trials.

The stigma associated with mental disorders is a global public health problem. Programs to combat it must be informed by the best available evidence. To this end, a meta-analysis was undertaken to investigate the effectiveness of existing programs. A systematic search of PubMed, PsycINFO and Cochrane databases yielded 34 relevant papers, comprising 33 randomized controlled trials. Twenty-seven papers (26 trials) contained data that could be incorporated into a quantitative analysis. Of these trials, 19 targeted personal stigma or social distance (6,318 participants), six addressed perceived stigma (3,042 participants) and three self-stigma (238 participants). Interventions targeting personal stigma or social distance yielded small but significant reductions in stigma across all mental disorders combined (d=0.28, 95% CI: 0.17-0.39, p<0.001) as well as for depression (d=0.36, 95% CI: 0.10-0.60, p<0.01), psychosis (d=0.20, 95% CI: 0.06-0.34, p<0.01) and generic mental illness (d=0.30, 95% CI: 0.10-0.50, p<0.01). Educational interventions were effective in reducing personal stigma (d=0.33, 95% CI: 0.19-0.42, p<0.001) as were interventions incorporating consumer contact (d=0.47, 95% CI: 0.17-0.78, p<0.001), although there were insufficient studies to demonstrate an effect for consumer contact alone. Internet programs were at least as effective in reducing personal stigma as face-to-face delivery. There was no evidence that stigma interventions were effective in reducing perceived or self-stigma. In conclusion, there is an evidence base to inform the roll out of programs for improving personal stigma among members of the community. However, there is a need to investigate methods for improving the effectiveness of these programs and to develop interventions that are effective in reducing perceived and internalized stigma.