Conditions: Chronic HCV Infection
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 339
Healthy volunteers: no

Brief summary:
This study will evaluate ledipasvir/sofosbuvir (LDV/SOF) fixed-dose combination (FDC) plus ribavirin (RBV) in participants with advanced liver disease or posttransplant and chronic genotype 1 or 4 hepatitis C virus (HCV) infection.

* Cohort A: decompensated cirrhosis (advanced liver disease), no prior liver transplant;
* Cohort B: post-liver transplant, with or without cirrhosis;
* Group assignment within cohorts is based on severity of liver impairment at screening (Child-Pugh-Turcotte (CPT) score for participants with cirrhosis; fibrosis; or presence of disease for fibrosing cholestatic hepatitis (FCH) groups)
* Randomization is 1:1 within groups to 12 or 24 weeks of LDV/SOF+RBV treatment.

Detailed description:

Arms:
arm 1: LDV/SOF (90/400 mg) plus RBV (starting at 600 mg, then adjusted ± based on tolerability \[weight-based maximum: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg\]) for 12 weeks in participants with CPT Class B (CPT score 7-9) arm 2: LDV/SOF (90/400 mg) plus RBV (starting at 600 mg, then adjusted ± based on tolerability \[weight-based maximum: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg\]) for 24 weeks in participants with CPT Class B (CPT score 7-9) arm 3: LDV/SOF (90/400 mg) plus RBV (starting at 600 mg, then adjusted ± based on tolerability \[weight-based maximum: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg\]) for 12 weeks in participants with CPT Class C (CPT score 10-12) arm 4: LDV/SOF (90/400 mg) plus RBV (starting at 600 mg, then adjusted ± based on tolerability \[weight-based maximum: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg\]) for 24 weeks in participants with CPT Class C (CPT score 10-12) arm 5: LDV/SOF (90/400 mg) plus RBV (weight-based: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg) for 12 weeks in participants with Fibrosis Stage F0-F3. arm 6: LDV/SOF (90/400 mg) plus RBV (weight-based: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg) for 24 weeks in participants with Fibrosis Stage F0-F3 arm 7: LDV/SOF (90/400 mg) plus RBV (weight-based: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg) for 12 weeks in participants with CPT Class A (CPT score 5-6) arm 8: LDV/SOF (90/400 mg) plus RBV (weight-based: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg) for 24 weeks in participants with CPT Class A (CPT score 5-6) arm 9: LDV/SOF (90/400 mg) plus RBV (starting at 600 mg, then adjusted ± based on tolerability \[weight-based maximum: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg\]) for 12 weeks in participants with CPT Class B (CPT score 7-9) arm 10: LDV/SOF (90/400 mg) plus RBV (starting at 600 mg, then adjusted ± based on tolerability \[weight-based maximum: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg\]) for 24 weeks in participants with CPT Class B (CPT score 7-9) arm 11: LDV/SOF (90/400 mg) plus RBV (starting at 600 mg, then adjusted ± based on tolerability \[weight-based maximum: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg\]) for 12 weeks in participants with CPT Class C (CPT score 10-12) arm 12: LDV/SOF (90/400 mg) plus RBV (starting at 600 mg, then adjusted ± based on tolerability \[weight-based maximum: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg\]) for 24 weeks in participants with CPT Class C (CPT score 10-12) arm 13: LDV/SOF (90/400 mg) plus RBV (weight-based: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg) for 12 weeks in participants with FCH arm 14: LDV/SOF (90/400 mg) plus RBV (weight-based: \< 75 kg = 1000 mg, ≥ 75 kg = 1200 mg) for 24 weeks in participants with FCH

Interventions: intervention 1: LDV/SOF intervention 2: RBV
Intervention descriptions: intervention 1: LDV/SOF FDC tablet administered orally once daily intervention 2: RBV tablets administered orally in a divided daily dose

Protocol document: