(A) Rapid virologic response (RVR), maintained rapid virologic response (mRVR), and sustained virologic response (SVR) rates by treatment group. (B) SVR rates in patients who achieved mRVR versus those who did not achieve mRVR. P values (two sided) were calculated using the Cochran-Mantel-Haenszel test, adjusted for genotype 1 subtype (1a or 1b). RVR, HCV RNA undetectable at week 4; mRVR, HCV RNA below the lower limit of quantification [LLOQ; <25 IU/ml] at week 4 and undetectable at weeks 8 and 12); SVR, HCV RNA undetectable at 24 weeks posttreatment.