Mental health-related stigma is an international issue among non-psychiatric professionals, and relevant research findings have been accumulated. This mini-review paper aimed to explore systematic reviews conducting a meta-analysis of stigma among non-psychiatric professionals and to summarize international trends. The database search using PubMed and hand search found the four relevant meta-analyses papers. Based on the two meta-analyses, although mental illness-related stigma in medical staff has gradually improved, medical staff in general hospitals tended to hold negative attitudes toward people with schizophrenia, drug dependence disorders and alcohol dependence disorders. Two meta-analyses on anti-stigma interventions reported that anti-stigma interventions involving simulated training such as role-playing and voice simulation and social contact may contribute to reducing stigma in medical staff. On the other hand, each meta-analysis included individual studies with psychiatric staff and psychologists as study participants. Therefore, the systematic review of meta-analysis included in this mini-review did not examine the extent of stigma or effective interventions that focus exclusively on non-psychiatric professionals. In addition, the long-term effects of anti-stigma interventions were still unclear since the follow-up period of individual studies were short. Future research is expected to address these issues.
 Authors' abstract