RESUMO
PURPOSE: In this systematic review, the authors examine the prevalence and extent of stigmatizing attitudes among health care professionals (HCPs) and trainees against patients with substance use disorders (SUDs), including research on interventions to reduce stigma. METHOD: The authors searched 7 databases for articles published from January 1, 2011, through February 15, 2023, that quantified SUD stigma among HCPs or trainees. Inclusion criteria allowed both observational and intervention studies from the United States or Canada to be included in this review. Quality assessment was applied to all included studies; studies were not excluded based on quality. RESULTS: A total of 1,992 unique articles were identified of which 32 articles (17 observational studies and 15 intervention studies), all conducted in the United States, met the inclusion criteria. Half of the included studies (16 of 32) were published in 2020 or later. Most of the intervention studies (13 of 15) used a single-group pre-post design; interventions involved didactics and/or interactions with persons with SUDs. The 32 included studies used a total of 19 different measures of stigma. All 17 observational studies showed some degree of HCP or trainee stigma against patients with SUDs. Most intervention studies (12 of 15) found small but statistically significant reductions in stigma after intervention. CONCLUSIONS: SUD stigma exists among HCPs and trainees. Some interventions to reduce this stigma had positive impacts, but future studies with larger, diverse participants and comparison groups are needed. Heterogeneity among studies and stigma measures limits the ability to interpret results across studies. Future rigorous research is needed to determine validated, consensus measures of SUD stigma among HCPs and trainees, identify stigma scores that are associated with clinical outcomes, and develop effective antistigma interventions for HCPs and trainees.