Effect of a Mobile-Health Intervention (A-CHESS) on Hepatitis C Testing Uptake Among People with Opioid Use Disorder: A Randomized Controlled Trial (Preprint)
BACKGROUND The growing epidemic of opioid use disorder (OUD) and associated injection drug use has resulted in a surge of new hepatitis C virus (HCV) infections. Approximately half of persons with HCV infection are unaware of their HCV status. Improving HCV awareness and increasing screening among people with OUD is critical. A-CHESS is an evidence-based, smartphone-delivered relapse prevention system that has been implemented among people with OUD who are receiving medication-assisted treatment (MAT) to improve long-term recovery. OBJECTIVE We incorporated HCV content and functionality into A-CHESS to (1) to characterize the HCV care continuum among people in early remission and receiving MAT for OUD and (2) determine whether incorporating HCV content and functionality into A-CHESS increases HCV testing. METHODS HCV intervention content, including dissemination of educational information, private messages tailored to individual’s stage of HCV care, and a public discussion forum, were implemented into the A-CHESS platform. Individuals with OUD were randomly assigned to receive MAT alone (control arm) or MAT + A-CHESS (experimental arm). Quarterly telephone interviews, conducted from baseline to month 24, assessed risk behaviors and HCV testing history. Cox proportional hazards regression was used to assess overall whether individuals who received A-CHESS were tested for HCV (including either antibody or RNA tested) at a higher rate than those in the control arm. To assess the effect of A-CHESS on subsets of individuals at highest risk for HCV, additional analyses examined the effect of the intervention among individuals who injected drugs and shared injection equipment. RESULTS Between April 2016 and April 2020, 416 individuals with OUD were enrolled. Overall, 44% of the study population was HCV-antibody positive, 30% were HCV-antibody negative, and 25% were considered untested at baseline. At month 24 there was no difference in HCV testing uptake between intervention and control participants overall. However, among the subset of 109 individuals who engaged in injection drug use, there was a slight trend towards increased HCV testing uptake among those who received A-CHESS (89% versus 85%; Hazard Ratio: 1.34; 95% CI: 0.87-2.05; P=.18), and a stronger trend was observed when focusing on the subset of 32 individuals who reported sharing injection equipment (87% versus 56%; Hazard Ratio: 2.92; 95% CI: 0.959-8.86; P=.059). CONCLUSIONS Incorporating HCV prevention and care information into A-CHESS may increase the uptake of HCV testing while preventing opioid relapse when implemented among populations who engage in high risk behaviors such as sharing contaminated injection equipment; however, studies that are powered to detect differences in HCV testing among high risk groups are needed. CLINICALTRIAL ClinicalTrials.gov, NCT02712034. Registered on 14 March 2016. INTERNATIONAL REGISTERED REPORT RR2-10.2196/12620