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Pegylated Interferon Alfa-2a Maintenance Therapy and Liver Disease Progression in People Infected With Both HIV and Hepatitis C Virus (HCV)

Suppressive Long-Term Antiviral Management of Hepatitis C Virus (HCV) and HIV-1 Coinfected Subjects (SLAM-C)

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00078403
Enrollment
333
Registered
2004-02-25
Start date
2004-07-31
Completion date
2009-02-28
Last updated
2021-11-08

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hepatitis C, HIV Infections, Liver Disease

Keywords

Treatment Experienced

Brief summary

Infection with both HIV and hepatitis C virus (HCV) may result in serious and sometimes fatal liver disease. The purpose of this study was to test the effectiveness of long-term pegylated interferon alfa-2a (PEG-IFN) and ribavirin treatment in slowing liver disease progression in people infected with both HIV and HCV.

Detailed description

Rapid progression of liver disease to liver failure has been observed in people coinfected with HIV and HCV. This observation appears to be directly related to an increase in the rate of fibrotic progression in the liver compared to people infected with HCV alone. PEG-IFN and ribavirin are used in standard treatment of HCV. This study tested the effectiveness of using PEG-IFN in reducing the rate of liver fibrosis progression in participants coinfected with HIV and HCV who could not lower their HCV viral load to undetectable or who could not maintain their HCV viral load at undetectable on PEG-IFN and ribavirin treatment. Participants entered Step 1 (initial run-in period) to receive 12 weeks of 180 mcg PEG-IFN subcutaneously once weekly plus 1 to 1.2 g/day ribavirin based on body weight. At week 12, HCV RNA testing was performed. Participants with early virologic response (EVR), defined as \>=2 log10 drop in HCV RNA from baseline or undetectable HCV RNA (\<600 IU/ml with quantitative assay used in Step 1) at Week 12, who had tolerated Step 1 treatment, entered into Step 3 to continue receiving the Step 1 treatment for a total of 72 weeks (Arm C). Participants who did not meet the criteria for entry into Step 3 were discontinued from the study. In Step 3, participants were followed for an additional 24 weeks after treatment discontinuation to determine sustained virologic response (SVR). Initially, Step 3 participants who had a detectable HCV viral load (\>=60 IU/ml with the qualitative assay used in Step 3) at Week 36 were eligible to enroll in Step 2. After early closure of Step 2, such participants remained in Step 3 until study completion. Participants with \<2 log10 drop in HCV RNA from baseline and detectable HCV RNA at Week 12 (non-EVR) discontinued Step 1 treatment. Non-EVRs who met the Step 2 eligibility criteria, were enrolled in Step 2 and randomized to receive 180 mcg PEG-IFN subcutaneously weekly for 72 weeks (Arm A) or observation for 72 weeks (Arm B). Participants who did not meet the criteria for entry into Step 2 were discontinued from the study. Step 2 of the study was closed prematurely in May 2007 due to lower than expected progression rates among the participants in the observation arm such that the primary objective could not be reached. There were no safety concerns. Liver biopsies were conducted at study screening, and at Step 2 entry and exit until the early closure of Step 2. Medical history assessment, physical exams, and blood collection were conducted every 4-12 weeks for participants in Steps 1, 2, and 3. Participants were followed for up to 18 weeks in Step 1, followed by a total of 72 in Step 2 or by up to a total of 84 weeks in Step 3.

Interventions

DRUGPeginterferon alfa-2a

180 mcg PEG-IFN subcutaneously

DRUGRibavirin

One tablet or capsule containing ribavirin 200 mg

Sponsors

National Institute of Allergy and Infectious Diseases (NIAID)
Lead SponsorNIH

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

for Step 1: * HIV infected * Stable antiretroviral therapy for at least 8 weeks prior to study entry OR have not received any antiretroviral therapy for at least 4 weeks prior to entry * HIV viral load less than 50,000 copies/ml within 6 weeks prior to study entry * CD4 count greater than 200 cells/mm\^3 within 6 weeks prior to study entry * Hepatitis C virus (HCV) infected * Either HCV treatment naive OR previously treated with interferon (IFN), PEG-IFN, IFN and ribavirin, or PEG-IFN and ribavirin for at least 12 weeks and HCV RNA positive following their last course of HCV treatment * Chronic liver disease consistent with chronic viral hepatitis * At least stage I fibrosis on a liver biopsy obtained within 104 weeks of study entry * If at stage VI fibrosis, Child-Pugh-Turcotte (CPT) score of 5 or less and no more than Child-Pugh Class A * Liver enzyme (alanine aminotransferase \[ALT\], aspartate aminotransferase \[AST\], and alkaline phosphatase) levels 10 times or less than upper limit of normal * Agree to use acceptable methods of contraception Inclusion Criteria for Step 2: * Currently enrolled in Step 1 or received 12 weeks of PEG-IFN plus ribavirin outside this study * Detectable HCV viral load and \<2 log10 decrease from baseline in plasma/serum HCV viral load at Week 12. * On Step 1 study treatment for no longer than 18 weeks Inclusion Criteria for Step 3: * Currently enrolled in Step 1 * Undetectable HCV RNA or a 2-log or greater decrease in plasma/serum HCV viral load. * On Step 1 study treatment for no longer than 18 weeks

Exclusion criteria

for Steps 1 and 3: * Have received HCV treatment within 4 weeks of study entry. Participants currently receiving treatment for HCV, if non-EVRs, were considered for direct entry into Step 2, without the run-in period in Step 1. * Could not tolerate treatment with PEG-IFN, defined as missing 3 or more consecutive PEG-IFN doses during the first 12 weeks or a total of 5 doses prior to Step 3 entry. Participants who have missed doses of ribavirin will not be excluded from Step 3 entry. * Use of granulocyte colony-stimulating factor (G-CSF) or granulocyte-macrophage colony-stimulating factor (GM-CSF) within 14 days prior to study entry * Alpha feto protein level 400 ng/ml or greater within 24 weeks prior to study entry, or alpha feto protein level greater than 50 ng/ml and less than 400 ng/ml (unless computed tomography \[CT\] scan or magnetic resonance imaging \[MRI\] shows no evidence of hepatic tumor) within 24 weeks prior to study entry * Decompensated liver disease, including presence or history of ascites, variceal bleeding, and brain or nervous system damage as a result of liver damage * Other causes of significant liver disease, including hepatitis A or B, excess iron deposits in the liver (hemochromatosis), or homozygote alpha-1 antitrypsin deficiency * Use of systemic corticosteroids, interferon gamma, TNF-alpha inhibitors, rifampin, rifabutin, pyrazinamide, isoniazid, ganciclovir, or hydroxyurea within 2 weeks prior to study entry * Known allergy/sensitivity to PEG-IFN alfa-2a or ribavirin or their formulations * History of uncontrolled seizure disorders * Clinically active thyroid disease. Thyroid hormone replacement therapy is permitted, but thyroid-stimulating hormone (TSH) and free thyroxine index (FTI) must be in normal range. * History of autoimmune processes, including Crohn's disease, ulcerative colitis, severe psoriasis, and rheumatoid arthritis, that may be made worse by interferon use * Any systemic antineoplastic or immunomodulatory treatment or radiation within 24 weeks prior to study entry * Malignancy * Active coronary artery disease within 24 weeks prior to study entry * Acute or active AIDS-defining opportunistic infections within 12 weeks of study entry * Hemoglobin abnormalities (e.g., thalassemia) or any other cause of or tendency to break down red blood cells (hemolysis) * History of major organ transplantation with an existing functional graft * Active drug or alcohol use or dependence that, in the opinion of the investigator, would interfere with study adherence * Uncontrolled or active depression or other psychiatric disorder, such as untreated Grade 3 psychiatric disorder, medically untreatable Grade 3 disorder, or any hospitalization within 52 weeks of study entry that, in the opinion of the investigator, may interfere with study requirements * Other serious illness or chronic medical condition that, in the opinion of the investigator, may have prevented participant's completion of the study * Pregnant or breastfeeding

Design outcomes

Primary

MeasureTime frameDescription
Time-scaled Change in Metavir Liver Fibrosis Score (SCMFS)Baseline and at week 72 or premature discontinuationSCMFS is the difference between the Metavir fibrosis scores of the study exit and study entry liver biopsies where the difference is scaled to one year. The SCMFS assesses the annualized change in the severity of liver fibrosis on a continuous scale from -4.0 Metavir units per year (reduced fibrosis over time, a positive study outcome) to +4.0 Metavir units per year (increased fibrosis over time).

Secondary

MeasureTime frameDescription
Time-scaled Change in Ishak Liver Inflammation Score (SCIIS)Baseline and at week 72 or premature discontinuationLiver biopsies were performed within 42 days prior to randomization between Arms A and B while the participant remained on PEG-IFN plus RBV (=entry biopsy) and again at week 72 or premature study discontinuation (=exit biopsy). SCIIS was defined as the difference between the Ishak inflammation score of the exit biopsy and the Ishak inflammation score of the entry biopsy, where the difference is scaled to one year.
Number of Participants With AnemiaUp to 96 weeksNumber of participants with anemia by grade (defined by hemoglobin level in grams per deciliter; g/dL). DAIDS Toxicity Grading Table (1992) was used for grading where Grade 1 = hemoglobin of 8 to 9.4 g/dl; Grade 2 = 7 to 7.9 g/dl; Grade 3 = 6.5 to 6.9 g/dl; Grade 4 = below 6.5 g/dl.
Number of Participants With NeutropeniaUp to 96 weeksNumber of participants with neutropenia by grade (defined by absolute neutrophil count \[ANC\] per cubic millimeter; mm\^3). DAIDS Toxicity Grading Table (1992) was used for grading where Grade 1 = ANC of 1000 to 1500 /mm\^3; Grade 2 = 750 to 999 /mm\^3; Grade 3 = 500 to 749 /mm\^3; Grade 4 = below 500 /mm\^3.
Number of Participants With ThrombocytopeniaUp to 96 weeksNumber of participants with thrombocytopenia by grade (defined by platelet count per cubic millimeter; mm\^3). DAIDS Toxicity Grading Table (1992) was used for grading where Grade 1 = platelets of 75,000 to 99,000 /mm\^3; Grade 2 = 50,000 to 74,999 /mm\^3; Grade 3 = 20,000 to 49,999 /mm\^3; Grade 4 = below 20,000 /mm\^3.
Number of Participants With Depression and/or Other Psychological EventsUp to 96 weeksDepression and other psychological events. DAIDS Toxicity Grading Table (1992) was used for grading. The protocol required reporting of depression and other psychological events of Grade 3 or higher or if led to a change in treatment, regardless of grade.
Number of Participants With High-grade Signs and Symptoms or Laboratory ValuesUp to 96 WeeksNumber of participants with high-grade (Grade 3 or higher) signs and symptoms or laboratory values. DAIDS Toxicity Grading Table (1992) was used for grading where Grade 1 = transient/mild discomfort, no limitation in activity, no medical intervention; Grade 2 = mild/moderate limitation in activity, some assistance, no/minimal medical intervention; Grade 3 = marked limitation in activity, some assistance, medical intervention required); Grade 4 = extreme limitation in activity, significant medical intervention, assistance, hospitalization.
Number of Participants With Dose Modifications, Temporary Stops, and Premature Treatment DiscontinuationsUp to 96 Weeks3-level categorical of the worst of 1) premature treatment discontinuation, 2) temporary stop or 3) dose reduction. For Arm C, the worst for either PEG-IFN or RBV is summarized.
Number of Participants Adherent to Study MedicationsArm A: at weeks 12, 24, 48 and 72. Arm C: at entry and weeks 12, 24, 48, 60.A categorical variable with levels adherent and non-adherent based on participants' self report. For Arm A, adherence was defined as not missing PEG within 2 weeks of visit. For Arm C, adherence was defined as not missing any PEG within 2 weeks of visit and not missing RBV within 4 days of visit.
Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Arms A and B: Weeks 0, 12, 24, 48 and 72; Arm C: Weeks 0, 12, 24, 36, 60, 72, 84Qualitative plasma HCV viral load was categorized as less than 60 IU/mL vs greater than or equal to 60 IU/mL where 60 IU/mL is the lower limit of qualitative assay used in Steps 2 and 3.
HCV-specific Immune Response in Intrahepatic LymphocytesEntry and week 72 (Arms A and B only).Due to premature closure of Arms A and B with insufficient number of participants for analysis, this outcome measure was not pursued.
Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Arms A and B: Weeks 0, 24, 48 and 72; Arm C: Weeks 0, 12, 24, 36, 48, 60, 72, 84A blood sample was drawn to determine the HIV-1 viral load. HIV-1 viral load was categorized as \<50 copies/mL (undetectable) or \>=50 copies/mL (detectable). 50 is the lower limit of detection of the assay.
Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Arms A and B: at entry and weeks 24, 48 and 72; Arm C: at entry and at weeks 12, 24, 36, 48, 72, 84 and 96.Insulin resistance was evaluated by HOMA-IR, calculated as \[fasting glucose (mg/dL) x fasting insulin (uIU/mL)\]/405. Study protocol required fasting for at least 8 hours (nothing by mouth except medications and water) prior to specimen collection for fasting insulin and fasting glucose testing.
Sustained Virologic Response24 weeks after end of treatmentSustained Virologic Response (SVR) was defined as undetectable HCV viral load (\<60 IU/ml) 24 weeks after treatment discontinuation.
Number of Participants Who Used Antianorexia Agents, Such as Megestrol and DronabinolUp to 96 weeksUse of antianorexia agents, such as megestrol and dronabinol at any time after pre-assignment.
Number of Participants With Prescription as Needed of Erythropoietin (EPO), Granulocyte Colony-stimulating Factor (GCSF), and Granulocyte-monocyte Colony-stimulating Factor (GM-CSF)At any time after pre-assignmentPrescription as needed of hematologic adjuvant therapies: erythropoietin (EPO), granulocyte colony-stimulating factor (GCSF), and granulocyte-monocyte colony-stimulating factor (GM-CSF) any time after pre-assignment
WeightArms A and B: at entry and weeks 4, 8, 12, 16, 24, 32, 40, 48, 56, 64 and 72; Arm C: at entry and weeks 4, 8, 12, 16, 24, 36, 48, 72, 84 and 96.Participant weight in kilograms.
HCV PolymorphismsEntry and week 72 (Arms A and B only).Due to premature closure of Arms A and B with insufficient number of participants for analysis, this outcome measure was not pursued.

Countries

Puerto Rico, United States

Participant flow

Recruitment details

People with hepatitis C virus (HCV)/HIV coinfection were recruited for participation in this study.

Pre-assignment details

330 participants were to receive 12 weeks of PEG+RBV to determine EVR status. Of the 330, 33 discontinued prior to week 12; 113 were non-EVRs, 80 of whom were randomized between Arms A and B; and 184 achieved EVR, 170 of whom were eligible to continue. 169 of the 170 were assigned to Arm C and one was inadvertently randomized between Arms A and B.

Participants by arm

ArmCount
Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)
At week 12 (end of the initial run-in period - Step 1) participants were found to have detectable HCV RNA (HCV RNA \>=600 IU/mL) and had less than a 2 log10 decrease in HCV RNA from baseline. For Step 2, participants were randomized to receive the pegylated interferon (PEG-IFN) 180 mcg weekly for 72 weeks.
44
OL (PEG-IFN, RBV) Then OL Randomized (Observation)
At week 12 (end of the initial run-in period - Step 1) participants were found to have detectable HCV RNA (HCV RNA \>=600 IU/mL) and had less than a 2 log10 decrease in HCV RNA from baseline. For Step 2, participants were randomized to 72 weeks of observation (no treatment).
42
OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)
At week 12 (end of initial run-in period, Step 1) participants were found to have undetectable HCV RNA (HCV RNA \<600 IU/mL) or at least a 2 log10 decrease in HCV RNA from baseline. Participants entered Step 3 and were assigned to continue the run-in treatment (PEG-IFN 180 mcg weekly & RBV1-1.2 g/day based on weight) for a total of 72 weeks. At week 36, participants who had detectable HCV RNA (HCV RNA \>=60 IU/mL using a qualitative assay) could enter Step 2 and be randomized to OL PEG-IFN or Observation.
169
Total255

Baseline characteristics

CharacteristicOpen Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)OL (PEG-IFN, RBV) Then OL Randomized (Observation)OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Total
Age, Categorical
<=18 years
0 Participants0 Participants0 Participants0 Participants
Age, Categorical
>=65 years
0 Participants0 Participants0 Participants0 Participants
Age, Categorical
Between 18 and 65 years
44 Participants42 Participants169 Participants255 Participants
Age, Continuous48.8 years
STANDARD_DEVIATION 6.7
48.1 years
STANDARD_DEVIATION 5.8
47.2 years
STANDARD_DEVIATION 7.1
47.6 years
STANDARD_DEVIATION 6.8
Region of Enrollment
Puerto Rico
3 participants2 participants1 participants6 participants
Region of Enrollment
United States
41 participants40 participants168 participants249 participants
Sex: Female, Male
Female
12 Participants12 Participants19 Participants43 Participants
Sex: Female, Male
Male
32 Participants30 Participants150 Participants212 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
— / —— / —— / —
other
Total, other adverse events
43 / 4441 / 42166 / 169
serious
Total, serious adverse events
6 / 442 / 4237 / 169

Outcome results

Primary

Time-scaled Change in Metavir Liver Fibrosis Score (SCMFS)

SCMFS is the difference between the Metavir fibrosis scores of the study exit and study entry liver biopsies where the difference is scaled to one year. The SCMFS assesses the annualized change in the severity of liver fibrosis on a continuous scale from -4.0 Metavir units per year (reduced fibrosis over time, a positive study outcome) to +4.0 Metavir units per year (increased fibrosis over time).

Time frame: Baseline and at week 72 or premature discontinuation

Population: 62 Arm A and B participants who had follow-up liver biopsy performed or those who had Week 72 potential as of May 2, 2007 but no follow-up liver biopsy. In the unadjusted ITT analysis, the participants without SCMFS available were assigned the highest SCMFS (+2).

ArmMeasureValue (MEDIAN)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Time-scaled Change in Metavir Liver Fibrosis Score (SCMFS)0 Metavir units per one year (52 weeks)
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Time-scaled Change in Metavir Liver Fibrosis Score (SCMFS)0 Metavir units per one year (52 weeks)
Comparison: Accrual and follow-up on Arms A and B were halted for futility at the first independent interim review of the primary endpoint conducted on May 2, 2007.p-value: 0.58Exact Wilcoxon rank sum test
Secondary

HCV Polymorphisms

Due to premature closure of Arms A and B with insufficient number of participants for analysis, this outcome measure was not pursued.

Time frame: Entry and week 72 (Arms A and B only).

Population: Due to premature closure of Arms A and B with insufficient number of participants for analysis, this outcome measure was not pursued. No participants were analyzed.

Secondary

HCV-specific Immune Response in Intrahepatic Lymphocytes

Due to premature closure of Arms A and B with insufficient number of participants for analysis, this outcome measure was not pursued.

Time frame: Entry and week 72 (Arms A and B only).

Population: Due to premature closure of Arms A and B with insufficient number of participants for analysis, this outcome measure was not pursued. No participants were analyzed.

Secondary

Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)

Insulin resistance was evaluated by HOMA-IR, calculated as \[fasting glucose (mg/dL) x fasting insulin (uIU/mL)\]/405. Study protocol required fasting for at least 8 hours (nothing by mouth except medications and water) prior to specimen collection for fasting insulin and fasting glucose testing.

Time frame: Arms A and B: at entry and weeks 24, 48 and 72; Arm C: at entry and at weeks 12, 24, 36, 48, 72, 84 and 96.

Population: All Arm A, B and C participants who had HOMA-IR result available. In Arm C, metabolic testing was only performed on participants who enrolled under protocol version 1.0. The number of participants with results available at time points listed in the Time Frame are shown in the Data Table Row Titles below.

ArmMeasureGroupValue (MEDIAN)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 0: HOMA-IR (N=32 in A, 32 in B, 72 in C)3.84 mg/dL x uIU/mL
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 12: HOMA-IR (N=72 in C)NA mg/dL x uIU/mL
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 24: HOMA-IR (N=34 in A, 30 in B, 73 in C)3.08 mg/dL x uIU/mL
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 36: HOMA-IR (N=66 in C)NA mg/dL x uIU/mL
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 48: HOMA-IR (N=30 in A, 24 in B, 74 in C)3.53 mg/dL x uIU/mL
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 72: HOMA-IR (N=67 in C)4.79 mg/dL x uIU/mL
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 84: HOMA-IR (N=63 in C)NA mg/dL x uIU/mL
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 96: HOMA-IR (N=65 in C)NA mg/dL x uIU/mL
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 24: HOMA-IR (N=34 in A, 30 in B, 73 in C)4.78 mg/dL x uIU/mL
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 84: HOMA-IR (N=63 in C)NA mg/dL x uIU/mL
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 36: HOMA-IR (N=66 in C)NA mg/dL x uIU/mL
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 48: HOMA-IR (N=30 in A, 24 in B, 74 in C)2.84 mg/dL x uIU/mL
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 72: HOMA-IR (N=67 in C)4.82 mg/dL x uIU/mL
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 0: HOMA-IR (N=32 in A, 32 in B, 72 in C)2.49 mg/dL x uIU/mL
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 12: HOMA-IR (N=72 in C)NA mg/dL x uIU/mL
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 96: HOMA-IR (N=65 in C)NA mg/dL x uIU/mL
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 24: HOMA-IR (N=34 in A, 30 in B, 73 in C)2.58 mg/dL x uIU/mL
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 12: HOMA-IR (N=72 in C)2.47 mg/dL x uIU/mL
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 0: HOMA-IR (N=32 in A, 32 in B, 72 in C)2.37 mg/dL x uIU/mL
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 36: HOMA-IR (N=66 in C)2.41 mg/dL x uIU/mL
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 84: HOMA-IR (N=63 in C)2.99 mg/dL x uIU/mL
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 72: HOMA-IR (N=67 in C)2.69 mg/dL x uIU/mL
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 48: HOMA-IR (N=30 in A, 24 in B, 74 in C)3.25 mg/dL x uIU/mL
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Homeostasis Model Assessment of Insulin Resistance (HOMA-IR)Week 96: HOMA-IR (N=65 in C)2.30 mg/dL x uIU/mL
Secondary

Number of Participants Adherent to Study Medications

A categorical variable with levels adherent and non-adherent based on participants' self report. For Arm A, adherence was defined as not missing PEG within 2 weeks of visit. For Arm C, adherence was defined as not missing any PEG within 2 weeks of visit and not missing RBV within 4 days of visit.

Time frame: Arm A: at weeks 12, 24, 48 and 72. Arm C: at entry and weeks 12, 24, 48, 60.

Population: All Arm A and Arm C participants. Arm B participants did not receive treatment.

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 0: Number of participants with adherence data0 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 0: Number of participants adherent to medsNA Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 12:Number of participants with adherence data37 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 12:Number of participants adherent to meds32 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 24:Number of participants with adherence data32 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 24:Number of participants adherent to meds28 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 48:Number of participants with adherence data22 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 48:Number of participants adherent to meds19 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 60:Number of participants with adherence data0 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 60:Number of participants adherent to medsNA Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 72:Number of participants with adherence data8 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Adherent to Study MedicationsWeek 72:Number of participants adherent to meds7 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 72:Number of participants with adherence data0 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 0: Number of participants with adherence data158 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 48:Number of participants with adherence data120 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 0: Number of participants adherent to meds132 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 60:Number of participants adherent to meds79 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 12:Number of participants with adherence data150 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 48:Number of participants adherent to meds95 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 12:Number of participants adherent to meds125 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 72:Number of participants adherent to medsNA Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 24:Number of participants with adherence data145 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 60:Number of participants with adherence data91 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Adherent to Study MedicationsWeek 24:Number of participants adherent to meds118 Participant
Secondary

Number of Participants Who Used Antianorexia Agents, Such as Megestrol and Dronabinol

Use of antianorexia agents, such as megestrol and dronabinol at any time after pre-assignment.

Time frame: Up to 96 weeks

Population: All Arm A, B and C participants

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Who Used Antianorexia Agents, Such as Megestrol and DronabinolNumber of participants who used megestrol2 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants Who Used Antianorexia Agents, Such as Megestrol and DronabinolNumber of participants who used dronabinol4 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants Who Used Antianorexia Agents, Such as Megestrol and DronabinolNumber of participants who used megestrol1 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants Who Used Antianorexia Agents, Such as Megestrol and DronabinolNumber of participants who used dronabinol4 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Who Used Antianorexia Agents, Such as Megestrol and DronabinolNumber of participants who used megestrol6 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants Who Used Antianorexia Agents, Such as Megestrol and DronabinolNumber of participants who used dronabinol22 Participant
Secondary

Number of Participants With Anemia

Number of participants with anemia by grade (defined by hemoglobin level in grams per deciliter; g/dL). DAIDS Toxicity Grading Table (1992) was used for grading where Grade 1 = hemoglobin of 8 to 9.4 g/dl; Grade 2 = 7 to 7.9 g/dl; Grade 3 = 6.5 to 6.9 g/dl; Grade 4 = below 6.5 g/dl.

Time frame: Up to 96 weeks

Population: All Arm A, B and C participants

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With AnemiaAnemia >= Grade 21 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With AnemiaGrade 20 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With AnemiaGrade 30 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With AnemiaGrade 41 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With AnemiaGrade 40 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With AnemiaAnemia >= Grade 20 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With AnemiaGrade 30 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With AnemiaGrade 20 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With AnemiaGrade 42 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With AnemiaGrade 23 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With AnemiaGrade 31 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With AnemiaAnemia >= Grade 26 Participant
Secondary

Number of Participants With Depression and/or Other Psychological Events

Depression and other psychological events. DAIDS Toxicity Grading Table (1992) was used for grading. The protocol required reporting of depression and other psychological events of Grade 3 or higher or if led to a change in treatment, regardless of grade.

Time frame: Up to 96 weeks

Population: All Arm A, B and C participants

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Depression and/or Other Psychological EventsGrade 41 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Depression and/or Other Psychological EventsGrade 32 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Depression and/or Other Psychological EventsAny psychological3 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Depression and/or Other Psychological EventsGrade 40 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Depression and/or Other Psychological EventsAny psychological1 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Depression and/or Other Psychological EventsGrade 31 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Depression and/or Other Psychological EventsGrade 41 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Depression and/or Other Psychological EventsGrade 318 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Depression and/or Other Psychological EventsAny psychological19 Participant
Secondary

Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)

Qualitative plasma HCV viral load was categorized as less than 60 IU/mL vs greater than or equal to 60 IU/mL where 60 IU/mL is the lower limit of qualitative assay used in Steps 2 and 3.

Time frame: Arms A and B: Weeks 0, 12, 24, 48 and 72; Arm C: Weeks 0, 12, 24, 36, 60, 72, 84

Population: All Arm A, B and C participants

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 24--Number of participants with HCV RNA data36 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 0--Number of participants with detectable HCV42 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 12--Number of participants with HCV RNA data42 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 12-Number of participants with detectable HCV40 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 0--Number of participants with HCV RNA data44 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 24-Number of participants with detectable HCV35 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 36--Number of participants with HCV RNA data0 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 36-Number of participants with detectable HCVNA Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 48--Number of participants with HCV RNA data31 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 48-Number of participants with detectable HCV31 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 60--Number of participants with HCV RNA data0 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 60-Number of participants with detectable HCVNA Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 72--Number of participants with HCV RNA data27 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 72-Number of participants with detectable HCV27 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 84--Number of participants with HCV RNA data0 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 84-Number of participants with detectable HCVNA Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 24-Number of participants with detectable HCV35 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 36--Number of participants with HCV RNA data0 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 84-Number of participants with detectable HCVNA Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 36-Number of participants with detectable HCVNA Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 72-Number of participants with detectable HCV22 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 48--Number of participants with HCV RNA data28 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 48-Number of participants with detectable HCV28 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 60--Number of participants with HCV RNA data0 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 0--Number of participants with HCV RNA data42 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 84--Number of participants with HCV RNA data0 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 0--Number of participants with detectable HCV42 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 60-Number of participants with detectable HCVNA Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 12--Number of participants with HCV RNA data34 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 12-Number of participants with detectable HCV34 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 24--Number of participants with HCV RNA data35 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 72--Number of participants with HCV RNA data22 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 60--Number of participants with HCV RNA data137 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 24-Number of participants with detectable HCV39 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 72--Number of participants with HCV RNA data135 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 12--Number of participants with HCV RNA data158 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 36--Number of participants with HCV RNA data158 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 0--Number of participants with HCV RNA data164 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 60-Number of participants with detectable HCV34 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 36-Number of participants with detectable HCV41 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 24--Number of participants with HCV RNA data163 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 0--Number of participants with detectable HCV53 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 48--Number of participants with HCV RNA data0 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 72-Number of participants with detectable HCV51 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 12-Number of participants with detectable HCV31 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 48-Number of participants with detectable HCVNA Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 84-Number of participants with detectable HCV50 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Detectable HCV Viral Load (>= 60 IU/mL)Week 84--Number of participants with HCV RNA data137 Participant
Secondary

Number of Participants With Dose Modifications, Temporary Stops, and Premature Treatment Discontinuations

3-level categorical of the worst of 1) premature treatment discontinuation, 2) temporary stop or 3) dose reduction. For Arm C, the worst for either PEG-IFN or RBV is summarized.

Time frame: Up to 96 Weeks

Population: All Arm A and C participants. Arm B participants did not receive treatment.

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Dose Modifications, Temporary Stops, and Premature Treatment DiscontinuationsPremature treatment discontinuation16 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Dose Modifications, Temporary Stops, and Premature Treatment DiscontinuationsTemporarily off treatment7 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Dose Modifications, Temporary Stops, and Premature Treatment DiscontinuationsReduced dose2 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Dose Modifications, Temporary Stops, and Premature Treatment DiscontinuationsPremature treatment discontinuation57 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Dose Modifications, Temporary Stops, and Premature Treatment DiscontinuationsTemporarily off treatment29 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Dose Modifications, Temporary Stops, and Premature Treatment DiscontinuationsReduced dose33 Participant
Secondary

Number of Participants With High-grade Signs and Symptoms or Laboratory Values

Number of participants with high-grade (Grade 3 or higher) signs and symptoms or laboratory values. DAIDS Toxicity Grading Table (1992) was used for grading where Grade 1 = transient/mild discomfort, no limitation in activity, no medical intervention; Grade 2 = mild/moderate limitation in activity, some assistance, no/minimal medical intervention; Grade 3 = marked limitation in activity, some assistance, medical intervention required); Grade 4 = extreme limitation in activity, significant medical intervention, assistance, hospitalization.

Time frame: Up to 96 Weeks

Population: All Arm A, B and C participants

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With High-grade Signs and Symptoms or Laboratory ValuesGrade 315 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With High-grade Signs and Symptoms or Laboratory ValuesAny Grade 3 or higher22 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With High-grade Signs and Symptoms or Laboratory ValuesGrade 47 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With High-grade Signs and Symptoms or Laboratory ValuesGrade 315 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With High-grade Signs and Symptoms or Laboratory ValuesAny Grade 3 or higher20 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With High-grade Signs and Symptoms or Laboratory ValuesGrade 45 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With High-grade Signs and Symptoms or Laboratory ValuesAny Grade 3 or higher84 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With High-grade Signs and Symptoms or Laboratory ValuesGrade 411 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With High-grade Signs and Symptoms or Laboratory ValuesGrade 373 Participant
Secondary

Number of Participants With Neutropenia

Number of participants with neutropenia by grade (defined by absolute neutrophil count \[ANC\] per cubic millimeter; mm\^3). DAIDS Toxicity Grading Table (1992) was used for grading where Grade 1 = ANC of 1000 to 1500 /mm\^3; Grade 2 = 750 to 999 /mm\^3; Grade 3 = 500 to 749 /mm\^3; Grade 4 = below 500 /mm\^3.

Time frame: Up to 96 weeks

Population: All Arm A, B and C participants

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With NeutropeniaGrade 310 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With NeutropeniaGrade 43 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With NeutropeniaNeutropenia >= Grade 220 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With NeutropeniaGrade 27 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With NeutropeniaGrade 24 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With NeutropeniaGrade 35 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With NeutropeniaNeutropenia >= Grade 210 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With NeutropeniaGrade 41 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With NeutropeniaGrade 238 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With NeutropeniaGrade 421 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With NeutropeniaNeutropenia >= Grade 296 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With NeutropeniaGrade 337 Participant
Secondary

Number of Participants With Prescription as Needed of Erythropoietin (EPO), Granulocyte Colony-stimulating Factor (GCSF), and Granulocyte-monocyte Colony-stimulating Factor (GM-CSF)

Prescription as needed of hematologic adjuvant therapies: erythropoietin (EPO), granulocyte colony-stimulating factor (GCSF), and granulocyte-monocyte colony-stimulating factor (GM-CSF) any time after pre-assignment

Time frame: At any time after pre-assignment

Population: All Arm A, B and C participants

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Prescription as Needed of Erythropoietin (EPO), Granulocyte Colony-stimulating Factor (GCSF), and Granulocyte-monocyte Colony-stimulating Factor (GM-CSF)Number of participants who used GCSF17 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Prescription as Needed of Erythropoietin (EPO), Granulocyte Colony-stimulating Factor (GCSF), and Granulocyte-monocyte Colony-stimulating Factor (GM-CSF)Number of participants who used EPO14 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Prescription as Needed of Erythropoietin (EPO), Granulocyte Colony-stimulating Factor (GCSF), and Granulocyte-monocyte Colony-stimulating Factor (GM-CSF)Number of participants who used GM-CSF0 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Prescription as Needed of Erythropoietin (EPO), Granulocyte Colony-stimulating Factor (GCSF), and Granulocyte-monocyte Colony-stimulating Factor (GM-CSF)Number of participants who used GCSF8 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Prescription as Needed of Erythropoietin (EPO), Granulocyte Colony-stimulating Factor (GCSF), and Granulocyte-monocyte Colony-stimulating Factor (GM-CSF)Number of participants who used EPO13 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Prescription as Needed of Erythropoietin (EPO), Granulocyte Colony-stimulating Factor (GCSF), and Granulocyte-monocyte Colony-stimulating Factor (GM-CSF)Number of participants who used GM-CSF0 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Prescription as Needed of Erythropoietin (EPO), Granulocyte Colony-stimulating Factor (GCSF), and Granulocyte-monocyte Colony-stimulating Factor (GM-CSF)Number of participants who used EPO70 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Prescription as Needed of Erythropoietin (EPO), Granulocyte Colony-stimulating Factor (GCSF), and Granulocyte-monocyte Colony-stimulating Factor (GM-CSF)Number of participants who used GM-CSF0 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Prescription as Needed of Erythropoietin (EPO), Granulocyte Colony-stimulating Factor (GCSF), and Granulocyte-monocyte Colony-stimulating Factor (GM-CSF)Number of participants who used GCSF60 Participant
Secondary

Number of Participants With Thrombocytopenia

Number of participants with thrombocytopenia by grade (defined by platelet count per cubic millimeter; mm\^3). DAIDS Toxicity Grading Table (1992) was used for grading where Grade 1 = platelets of 75,000 to 99,000 /mm\^3; Grade 2 = 50,000 to 74,999 /mm\^3; Grade 3 = 20,000 to 49,999 /mm\^3; Grade 4 = below 20,000 /mm\^3.

Time frame: Up to 96 weeks

Population: All Arm A, B and C participants

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With ThrombocytopeniaThrombocytopenia >= Grade 214 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With ThrombocytopeniaGrade 210 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With ThrombocytopeniaGrade 34 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With ThrombocytopeniaGrade 40 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With ThrombocytopeniaGrade 40 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With ThrombocytopeniaThrombocytopenia >= Grade 24 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With ThrombocytopeniaGrade 31 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With ThrombocytopeniaGrade 23 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With ThrombocytopeniaGrade 41 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With ThrombocytopeniaGrade 225 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With ThrombocytopeniaGrade 35 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With ThrombocytopeniaThrombocytopenia >= Grade 231 Participant
Secondary

Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)

A blood sample was drawn to determine the HIV-1 viral load. HIV-1 viral load was categorized as \<50 copies/mL (undetectable) or \>=50 copies/mL (detectable). 50 is the lower limit of detection of the assay.

Time frame: Arms A and B: Weeks 0, 24, 48 and 72; Arm C: Weeks 0, 12, 24, 36, 48, 60, 72, 84

Population: All Arm A, B, and C participants

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 24: Number of participants with HIV RNA data39 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 0: No. of participants with undetectable VL32 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 12: Number of participants with HIV RNA data0 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 12: No. of participants with undetectable VLNA Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 0: Number of participants with HIV RNA data44 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 24: No. of participants with undetectable VL25 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 36: Number of participants with HIV RNA data0 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 36: No. of participants with undetectable VLNA Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 48: Number of participants with HIV RNA data35 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 48: No. of participants with undetectable VL24 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 60: Number of participants with HIV RNA data0 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 60: No. of participants with undetectable VLNA Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 72: Number of participants with HIV RNA data27 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 72: No. of participants with undetectable VL19 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 84: Number of participants with HIV RNA data0 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 84: No. of participants with undetectable VLNA Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 84: Number of participants with HIV RNA data0 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 24: No. of participants with undetectable VL25 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 84: No. of participants with undetectable VLNA Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 36: Number of participants with HIV RNA data0 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 72: Number of participants with HIV RNA data27 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 36: No. of participants with undetectable VLNA Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 48: Number of participants with HIV RNA data33 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 48: No. of participants with undetectable VL25 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 72: No. of participants with undetectable VL20 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 0: Number of participants with HIV RNA data42 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 60: Number of participants with HIV RNA data0 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 0: No. of participants with undetectable VL34 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 12: Number of participants with HIV RNA data0 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 12: No. of participants with undetectable VLNA Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 60: No. of participants with undetectable VLNA Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 24: Number of participants with HIV RNA data39 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 12: Number of participants with HIV RNA data164 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 72: No. of participants with undetectable VL107 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 24: No. of participants with undetectable VL141 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 0: Number of participants with HIV RNA data169 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 60: No. of participants with undetectable VL113 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 36: Number of participants with HIV RNA data160 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 12: No. of participants with undetectable VL138 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 0: No. of participants with undetectable VL146 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 36: No. of participants with undetectable VL134 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 72: Number of participants with HIV RNA data140 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 60: Number of participants with HIV RNA data140 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 48: Number of participants with HIV RNA data150 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 84: No. of participants with undetectable VL108 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 24: Number of participants with HIV RNA data165 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 84: Number of participants with HIV RNA data136 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Number of Participants With Undetectable HIV Viral Load (<50 Copies/mL)Week 48: No. of participants with undetectable VL125 Participant
Secondary

Sustained Virologic Response

Sustained Virologic Response (SVR) was defined as undetectable HCV viral load (\<60 IU/ml) 24 weeks after treatment discontinuation.

Time frame: 24 weeks after end of treatment

Population: All Arm A, B and C participants

ArmMeasureGroupValue (NUMBER)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Sustained Virologic ResponseYes0 Participant
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Sustained Virologic ResponseNo44 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Sustained Virologic ResponseYes0 Participant
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Sustained Virologic ResponseNo42 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Sustained Virologic ResponseYes88 Participant
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)Sustained Virologic ResponseNo81 Participant
Secondary

Time-scaled Change in Ishak Liver Inflammation Score (SCIIS)

Liver biopsies were performed within 42 days prior to randomization between Arms A and B while the participant remained on PEG-IFN plus RBV (=entry biopsy) and again at week 72 or premature study discontinuation (=exit biopsy). SCIIS was defined as the difference between the Ishak inflammation score of the exit biopsy and the Ishak inflammation score of the entry biopsy, where the difference is scaled to one year.

Time frame: Baseline and at week 72 or premature discontinuation

Population: All participants with SCIIS available (Complete Cases)

ArmMeasureValue (MEDIAN)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)Time-scaled Change in Ishak Liver Inflammation Score (SCIIS)0 Ishak units per one year (52 weeks)
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)Time-scaled Change in Ishak Liver Inflammation Score (SCIIS)1.31 Ishak units per one year (52 weeks)
Secondary

Weight

Participant weight in kilograms.

Time frame: Arms A and B: at entry and weeks 4, 8, 12, 16, 24, 32, 40, 48, 56, 64 and 72; Arm C: at entry and weeks 4, 8, 12, 16, 24, 36, 48, 72, 84 and 96.

Population: All Arm A, B and C participants who had weight available. The number of participants with results available at time points listed in the Time Frame are shown in the Data Table Row Titles below.

ArmMeasureGroupValue (MEDIAN)
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 64: Weight (N=26 in A, 24 in B)78.5 kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 4: Weight (N=43 in A, 35 in B, 161 in C)74.7 kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 24: Weight (N=39 in A, 36 in B, 165 in C)75.5 kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 56: Weight (N=31 in A, 24 in B)79.7 kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 12: Weight (N=42 in A, 30 in B, 157 in C)76.3 kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 32: Weight (N=37 in A, 35 in B)76.5 kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 84: Weight (N=140 in C)NA kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 0: Weight (N=43 in A, 42 in B, 169 in C)74.9 kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 36: Weight (N=162 in C)NA kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 96: Weight (N=138)NA kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 8: Weight (N=39 in A, 34 in B, 162 in C)74.9 kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 40: Weight (N=32 in A, 29 in B)75.7 kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 72: Weight (N=26 in A, 27 in B, 141 in C)81.6 kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 16: Weight (N=39 in A, 35 in B, 164 in C)77.4 kilograms
A: Open Label (OL) (PEG-IFN, RBV); OL Randomized (PEG-IFN)WeightWeek 48: Weight (N=33 in A, 31 in B, 153 in C)78.2 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 16: Weight (N=39 in A, 35 in B, 164 in C)79.9 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 56: Weight (N=31 in A, 24 in B)81.6 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 0: Weight (N=43 in A, 42 in B, 169 in C)79.8 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 64: Weight (N=26 in A, 24 in B)84.0 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 72: Weight (N=26 in A, 27 in B, 141 in C)85.4 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 12: Weight (N=42 in A, 30 in B, 157 in C)81.1 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 84: Weight (N=140 in C)NA kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 96: Weight (N=138)NA kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 48: Weight (N=33 in A, 31 in B, 153 in C)80.4 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 24: Weight (N=39 in A, 36 in B, 165 in C)79.4 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 4: Weight (N=43 in A, 35 in B, 161 in C)80.4 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 32: Weight (N=37 in A, 35 in B)80.4 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 36: Weight (N=162 in C)NA kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 40: Weight (N=32 in A, 29 in B)83.1 kilograms
B: OL (PEG-IFN, RBV) Then OL Randomized (Observation)WeightWeek 8: Weight (N=39 in A, 34 in B, 162 in C)80.8 kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 96: Weight (N=138)78.4 kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 0: Weight (N=43 in A, 42 in B, 169 in C)75.8 kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 4: Weight (N=43 in A, 35 in B, 161 in C)75.8 kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 8: Weight (N=39 in A, 34 in B, 162 in C)75.8 kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 12: Weight (N=42 in A, 30 in B, 157 in C)76.3 kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 16: Weight (N=39 in A, 35 in B, 164 in C)76.3 kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 24: Weight (N=39 in A, 36 in B, 165 in C)75.8 kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 32: Weight (N=37 in A, 35 in B)NA kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 36: Weight (N=162 in C)75.0 kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 40: Weight (N=32 in A, 29 in B)NA kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 56: Weight (N=31 in A, 24 in B)NA kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 64: Weight (N=26 in A, 24 in B)NA kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 72: Weight (N=26 in A, 27 in B, 141 in C)75.6 kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 84: Weight (N=140 in C)77.0 kilograms
C: OL (PEG-IFN, RBV) Then OL (PEG-IFN, RBV)WeightWeek 48: Weight (N=33 in A, 31 in B, 153 in C)75.1 kilograms

Source: ClinicalTrials.gov · Data processed: Mar 28, 2026