An Observational Study on Dual And Triple Therapies Based on Peginterferon Alfa (e.g. Pegasys) in Patients With Chronic Hepatitis C

SVR12 rate for dual therapy participants is defined as percentage of participants with hepatitis C virus (HCV) ribonucleic acid (RNA) less than (\<) 50 international unit/milliliters (IU/mL) (as measured by a commercially available HCV RNA test with lower limit of detection less than or equal to \[\<=\] 50 IU/mL) at 12 weeks post completion of the treatment period. If a quantitative test was used, the lower limit of quantification had to be \<=50 IU/mL. SVR12 for triple therapy participants is defined as percentage of participants with undetectable HCV RNA assessed by a test with lower limit of detection \<= 50 IU/mL at 12 weeks post completion of the treatment period.

Time frame: 12 weeks after end of treatment (up to 118 weeks)

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).

SVR24 rate for dual therapy participants is defined as percentage of participants with hepatitis C virus (HCV) ribonucleic acid (RNA) less than (\<) 50 international unit/milliliters (IU/mL) (as measured by a commercially available HCV RNA test with lower limit of detection less than or equal to \[\<=\] 50 IU/mL) at 24 weeks post completion of the treatment period. If a quantitative test was used, the lower limit of quantification had to be \<=50 IU/mL. SVR24 for triple therapy participants is defined as percentage of participants with undetectable HCV RNA assessed by a test with lower limit of detection \<= 50 IU/mL at 24 weeks post completion of the treatment period.

Time frame: 24 weeks after end of treatment (up to 118 weeks)

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).

Duration of overall treatment was defined as the time between first and last administration of any study drug, in weeks.

Time frame: Up to 118 weeks

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).

Extended (rapid) virological response (eRVR) defined as UVR at weeks 4 and 12 for telaprevir, and as UVR at weeks 8 and 24 for boceprevir.

Time frame: Up to 98 weeks

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).

Time frame: Up to 118 weeks

Population: The data for this outcome measure were not collected and analyzed because the standard of care has changed significantly since the development of the study protocol, this comparison was no longer of practical value.

Participants who prolonged the treatment period from 72 weeks were not reported. Participants who discontinued their treatment as planned were included. Here, number of participant analyzed is the total number of participants who received direct-acting anti-viral (DAA).

Time frame: Up to 72 weeks of treatment

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).

Participants who prolonged the treatment period from 72 weeks were not reported.

Time frame: Up to 72 weeks of treatment

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).

An AE was defined as any adverse medical event that occurred after the participant used the investigational medicinal product (IMP) or other intervention behaviors specified by the protocol in the clinical trial regardless of relationship to the study treatment.

Time frame: Up to 118 weeks

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).

Time frame: Baseline

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).

SVR 12 and 24 rates for dual therapy participants are defined as percentage of participants with hepatitis C virus (HCV) ribonucleic acid (RNA) less than (\<) 50 international unit/milliliters (IU/mL) (as measured by a commercially available HCV RNA test with lower limit of detection less than or equal to \[\<=\] 50 IU/mL) at 12 or 24 weeks post completion of the treatment period. If a qualitative test was used, then the lower limit of detection has to be \<=50 IU/mL. SVR12 and 24 rates for triple therapy participants are defined as percentage of participants with undetectable HCV RNA assessed by a test with lower limit of detection \<= 50 IU/mL at 12 or 24 weeks post completion of the treatment period. Here, number of participants analyzed excluded the participants with premature withdrawal due to lack of efficacy or non-safety reasons and participants without dose reductions or interruptions during the first 99 study days.

Time frame: Up to first 12 weeks of treatment

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).

Percentage of participants with very rapid virological response (VRVR) (defined as VR/UVR by study week 2), rapid virological response (RVR) (defined as VR/UVR by study week 4, but no VRVR), complete early virological response (cEVR) (defined as VR/UVR by study week 12, but no VRVR or RVR) and partial early virological response (pEVR) (defined as a 2 log10 drop of HCV RNA by study week 12, but no VRVR, RVR or cEVR) were reported.

Time frame: Up to 12 weeks

Population: The data for all of the above mentioned virological responses were not collected and was not analyzed.

Virological breakthrough/rebound defined as non-VR/non-UVR during the treatment period (including end of treatment) in participants with prior VR/UVR or an increase of HCV RNA by \>=1 log10 during the treatment period in comparison to the lowest HCV RNA (nadir) previously measured during the treatment period in participants without VR/UVR during the treatment period. Here, Number of participants analyzed is the participants with at least 2 on-treatment HCV RNA assessments (including EoT) or 1 on-treatment HCV RNA assessment (excluding EoT) and response at EoT by backward imputation.

Time frame: Up to EOT (up to 118 weeks)

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).

Virological relapse defined as non-virological response (non-VR)/non-undetectable virological response (non-UVR) at the last HCV RNA assessment during the treatment-free follow-up period in participants with VR/UVR at EOT. Here, number of participants analyzed is the participants with end of treatment response (EoT-R) who also had an HCV RNA test at least 12 weeks after EoT or whose last follow-up HCV RNA test showed non-response (HCV RNA \>=50 IU/mL).

Time frame: Up to 24 weeks after EOT (up to 118 weeks)

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).

Virological response (VR) for dual therapy participants is defined as HCV RNA \<50 IU/mL as assessed by a qualitative HCV RNA test with a lower limit of detection (LLD) \<=50 IU/mL or as assessed by a quantitative test with a lower limit of quantification (LLQ) \<=50 IU/mL for all time points concerned. Results of HCV RNA tests with LLD and LLQ \>50 IU/mL were considered as non-response. VR for triple therapy participants is defined as undetectable HCV RNA assessed by a test with lower limit of detection \<=50 IU/mL (UVR). Results of HCV RNA tests with an LLD \>50 IU/mL were considered as non-response for triple therapy participants.

Time frame: Week 4, 12 and End of treatment (EOT) (up to 96 weeks)

Population: Core population: treatment-naive/experienced participants who were without contraindication to Peg-IFN and RBV, end stage renal disease, major organ transplantation, co-infection with hepatitis B or HIV, acute hepatitis and with positive HCV RNA at baseline, known genotype, 1 of 6 treatment (excluding non-G1 participants receiving triple therapy).