• Jennifer McNeely, Andrea B Troxel, Hillary V Kunins, Donna Shelley, Joshua D Lee, Alexander Walley, Zoe M Weinstein, John Billings, Nichola J Davis, MarcelloRoopa KalyanaramanRKOffice of Population Health, NYC Health and Hospitals, 199 Water Street, New York, NY, 10038, USA., Bruce R Schackman, Charles Barron, and Luke Bergmann.
• Department of Population Health, Section on Alcohol, Tobacco and Drug Use, NYU School of Medicine, 180 Madison Avenue, 17th floor, New York, NY, 10016, USA. Jennifer.McNeely@nyulangone.org.
• Addict Sci Clin Pract. 2019 Feb 19; 14 (1): 5.

BackgroundTreatment for opioid use disorder (OUD) is highly effective, yet it remains dramatically underutilized. Individuals with OUD have disproportionately high rates of hospitalization and low rates of addiction treatment. Hospital-based addiction consult services offer a potential solution by using multidisciplinary teams to evaluate patients, initiate medication for addiction treatment (MAT) in the hospital, and connect patients to post-discharge care. We are studying the effectiveness of an addiction consult model [Consult for Addiction Treatment and Care in Hospitals (CATCH)] as a strategy for engaging patients with OUD in treatment as the program rolls out in the largest municipal hospital system in the US. The primary aim is to evaluate the effectiveness of CATCH in increasing post-discharge initiation and engagement in MAT. Secondary aims are to assess treatment retention, frequency of acute care utilization and overdose deaths and their associated costs, and implementation outcomes.MethodsA pragmatic trial at six hospitals, conducted in collaboration with the municipal hospital system and department of health, will be implemented to study the CATCH intervention. Guided by the RE-AIM evaluation framework, this hybrid effectiveness-implementation study (Type 1) focuses primarily on effectiveness and also measures implementation outcomes to inform the intervention's adoption and sustainability. A stepped-wedge cluster randomized trial design will determine the impact of CATCH on treatment outcomes in comparison to usual care for a control period, followed by a 12-month intervention period and a 6- to 18-month maintenance period at each hospital. A mixed methods approach will primarily utilize administrative data to measure outcomes, while interviews and focus groups with staff and patients will provide additional information on implementation fidelity and barriers to delivering MAT to patients with OUD.DiscussionBecause of their great potential to reduce the negative health and economic consequences of untreated OUD, addiction consult models are proliferating in response to the opioid epidemic, despite the absence of a strong evidence base. This study will provide the first known rigorous evaluation of an addiction consult model in a large multi-site trial and promises to generate knowledge that can rapidly transform practice and inform the potential for widespread dissemination of these services.Trial RegistrationNCT03611335.

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