Abstract
BackgroundPersons who inject drugs (PWID) are a key population for hepatitis C virus (HCV) treatment. Study aims were to describe injection practices of PWID during HCV treatment with direct-acting antivirals (DAAs) and assess whether injection practices were associated with not achieving a sustained virologic response (SVR). MethodsSecondary analysis of the HERO Study (ClinicalTrials.gov, NCT02824640), a pragmatic randomized trial in 8 U.S. states to evaluate the effectiveness of HCV care models among active PWID seen in opioid treatment programs and community clinics. Frequency, sharing and reuse of injecting equipment were assessed at baseline, end-of-treatment (EOT) and quarterly visits up to 60 weeks post-treatment. Generalized Estimating Equations logistic regression models with linear spline were used to compare trends in injecting behaviors during vs. post-treatment. Multivariable logistic regression models explored associations between injecting behaviors during treatment and lack of SVR. ResultsAmong 501 participants, 27% were female, 35% were non-white, mean age was 44 (SD 11.5) years and nearly half (49%) were unhoused. At baseline, 41% reported receptive sharing of injecting equipment, declining to 16% at EOT visit. Receptive sharing of cookers, rinses, or needles/syringes during treatment was associated with a nearly 5-fold increase in not achieving SVR (adjusted odds ratio (aOR)=4.83; 95% CI: 2.26, 10.28) as was reuse of one’s own needles/syringes (aOR=2.37; 95% CI: 1.11, 4.92). ConclusionsPWID in the HERO study adopted safer injecting behaviors during DAA treatment; receptive sharing of injecting equipment and reuse of one’s own equipment during treatment were associated with not achieving cure.
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