LAUSR

Supplemental Digital Content is available in the text. Background: Substance use disorders (SUDs), prevalent worldwide, are associated with significant morbidity and health care utilization. Objectives: To identify interventions addressing hospital and emergency department utilization among people with substance use, to summarize findings for those seeking to implement such interventions, and to articulate gaps that can be addressed by future research. Research Design: A scoping review of the literature. We searched PubMed, PsycInfo, and Google Scholar for any articles published from January 2010 to June 2020. The main search terms included the target population of adults with substance use or SUDs, the outcomes of hospital and emergency department utilization, and interventions aimed at improving these outcomes in the target population. Subjects: Adults with substance use or SUDs, including alcohol use. Measures: Hospital and emergency department utilization. Results: Our initial search identified 1807 titles, from which 44 articles were included in the review. Most interventions were implemented in the United States (n=35). Half focused on people using any substance (n=22) and a quarter on opioids (n=12). The tested approaches varied and included postdischarge services, medications, legislation, and counseling, among others. The majority of study designs were retrospective cohort studies (n=31). Conclusions: Overall, we found few studies assessing interventions to reduce health care utilization among people with SUDs. The studies that we did identify differed across multiple domains and included few randomized trials. Study heterogeneity limits our ability to compare interventions or to recommend one specific approach to reducing health care utilization among this high-risk population.