The changes from week 0 to post-treatment (PT) week 12 in key ISG expression in PBMCs for participants achieving sustained virologic response 12 weeks PT (SVR12) where SVR12 was defined as hepatitis C virus ribonucleic acid (HCV RNA) level less than the lower limit of quantification (\<LLOQ) 12 weeks after the last dose of study drug. For each key ISG, fold change was defined as the ratio of the difference between PT Week 12 and baseline expressions over the baseline expression.

SVR12 was defined as plasma hepatitis C virus ribonucleic acid (HCV RNA) level less than the lower limit of quantification \[\<LLOQ\]) 12 weeks after the last dose of study drug. Participants with missing data after backwards imputation were imputed as nonresponders.

SVR12, defined as HCV RNA \< lower limit of quantification (LLOQ) in the SVR12 window (12 weeks after the last actual dose of study drug) without any confirmed quantifiable (≥ LLOQ) post-treatment value before or during that SVR window. Flanking imputation: for participants with missing HCV RNA at a visit who have an undetectable HCV RNA or unquantifiable HCV RNA at the preceding visit and the succeeding visit, the missing value was imputed as undetectable or unquantifiable. For SVR analyses, if there was no value in the window after the flanking imputation but there was an HCV RNA value after the window, then it was imputed into the SVR window. After above imputations were applied, if there was still no value in the window but there was an HCV RNA value from a local laboratory present, then it was imputed into the SVR window. Otherwise, participants with missing data were counted as failures. The 95% confidence interval was calculated using the Wilson score method.

SVR12 was defined as plasma hepatitis C virus ribonucleic acid (HCV RNA) level less than the lower limit of quantification (\<LLOQ) 12 weeks after the last dose of study drug.

HCV viral kinetics in plasma during therapy were modeled through non-linear mixed effect models, including a rapid first phase of initial decline and a slower second phase decline. The slope of the second phase decline was estimated for each treatment arm.