This multicenter study was to evaluate subjects with chronic genotype 2 or 3 HCV infection who were interferon (IFN) ineligible, IFN intolerant or unwilling to take IFN. Participants were randomized in a 3:1 ratio to receive sofosbuvir (SOF)+ribavirin (RBV), or placebo to match SOF+placebo to match RBV. Randomization was stratified by presence/absence of cirrhosis. Approximately 20% of participants may have had evidence of cirrhosis at screening.
Participants who were randomized to the placebo arm and completed all scheduled study procedures were eligible to receive active SOF+RBV in open-label Study GS-US-334-0109. Participants who do not achieve sustained virologic response (SVR) were eligible for enrollment in the Sequence Registry Study GS-US-248-0123. The purpose of the Sequence Registry Study is to monitor the persistence of resistant mutations for up to 3 years. Participants who achieved SVR were eligible for enrollment in the SVR Registry Study GS-US-248-0122. The purpose of the SVR Registry Study is to evaluate durability of SVR for up to 3 years after treatment.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
278
Sofosbuvir (SOF) 400 mg tablet administered orally once daily
Ribavirin (RBV) was administered as a tablet orally according to package insert weight-based dosing recommendations (\< 75kg = 1000 mg and ≥ 75 kg = 1200 mg).
Placebo to match SOF was administered orally once daily.
Placebo to match RBV was administered orally twice daily.
University of Alabama Birmingham
Birmingham, Alabama, United States
SCTI Research Foundation Liver Center
Coronado, California, United States
Kaiser Permanente
Los Angeles, California, United States
Lightspeed Medical
Los Angeles, California, United States
Anthony Mills MD, Inc.
Los Angeles, California, United States
Percentage of Participants Achieving SVR12
SVR12 was defined as HCV RNA \< the lower limit of quantitation (LLOQ, ie, \< 25 IU/mL) 12 weeks after cessation of therapy
Time frame: Post-treatment Week 12
Number of Participants Experiencing Adverse Events Leading to Permanent Discontinuation of Study Drug
The number of subjects experiencing adverse events leading to permanent discontinuation of study drug was summarized. Adverse events may or may not have been related to study treatment.
Time frame: Baseline to Week 12
Percentage of Participants Achieving SVR4
SVR4 was defined as HCV RNA \< LLOQ 4 weeks after cessation of therapy
Time frame: Post-treatment Week 4
Percentage of Participants Achieving SVR24
SVR24 was defined as HCV RNA \< LLOQ 24 weeks after cessation of therapy
Time frame: Post-treatment Week 24
Percentage of Participants Experiencing Viral Breakthrough
Viral breakthrough was defined as HCV RNA ≥ LLOQ after having previously had HCV RNA \< LLOQ while receiving treatment, confirmed with 2 consecutive values (second confirmation value could be posttreatment), or last available on-treatment measurement with no subsequent follow-up values
Time frame: Baseline to Week 12
Percentage of Participants Experiencing Viral Relapse
Viral relapse was defined as HCV RNA ≥ LLOQ during the posttreatment period having achieved HCV RNA \< LLOQ at end of treatment, confirmed with 2 consecutive values or last available posttreatment measurement
Time frame: End of treatment to post-treatment Week 24
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Medical Associates Research Group
San Diego, California, United States
UCSD Antiviral Research Center
San Diego, California, United States
Kaiser Permanente
San Diego, California, United States
Quest Clinical Research
San Francisco, California, United States
University of Colorado
Aurora, Colorado, United States
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