A Study to Evaluate the Safety and Effect of the Experimental Drugs ABT-450/Ritonavir/ABT-267 (ABT-450/r/ABT-267) and ABT-333 in Subjects With Chronic Hepatitis C

The percentage of participants with sustained virologic response (plasma Hepatitis C virus ribonucleic acid \[HCV RNA\] level less than the lower limit of quantitation \[\< LLOQ\]) 12 weeks after the last dose of study drug. The LLOQ for the assay was 25 IU/mL. The primary efficacy endpoints were noninferiority of the percentage of participants who achieved sustained virologic response 12 weeks after treatment in each treatment arm (ABT-450/r/ABT-267 and ABT-333 with and without RBV) compared with the historical control rate for noncirrhotic, treatment-experienced participants with HCV GT1b infection treated with telaprevir and peginterferon (pegIFN)/RBV.

Time frame: 12 weeks after last dose of study drug

Population: All randomized participants with HCV subgenotype 1B (GT1b) infection who received at least 1 dose of coformulated ABT-450/r/ABT-267 and ABT-333, with or without RBV (intent-to-treat \[ITT GT1b\] population); participants with missing data were counted as non-responders.

The percentage of participants with a decrease in hemoglobin from greater than or equal to the lower limit of normal (≥ LLN) at baseline to \< LLN at the end of treatment.

Time frame: Baseline (Day 1) and Week 12 (End of Treatment)

Population: All randomized participants with HCV subgenotype 1B (GT1b) infection who received at least 1 dose of coformulated ABT-450/r/ABT-267 and ABT-333, with or without RBV (intent-to-treat \[ITT GT1b\]) and had hemoglobin ≥ LLN reference range at baseline.

The percentage of participants with sustained virologic response (plasma Hepatitis C virus ribonucleic acid \[HCV RNA\] level less than the lower limit of quantitation \[\< LLOQ\]) 12 weeks after the last dose of study drug. The secondary efficacy endpoints were superiority of the percentage of participants who achieved sustained virologic response 12 weeks after treatment in each treatment arm (ABT-450/r/ABT-267 and ABT-333 with and without RBV) compared with the historical control rate for noncirrhotic, treatment-experienced participants with HCV GT1b treated with telaprevir and pegIFN/RBV; and the noninferiority of the percentage of participants who achieved sustained virologic response 12 weeks after treatment who received ABT-450/r/ABT-267 and ABT-333 compared with those who received ABT-450/r/ABT-267 and ABT-333, plus RBV.

Time frame: 12 weeks after last dose of study drug

Population: All randomized participants with HCV subgenotype 1B (GT1b) infection who received at least 1 dose of coformulated ABT-450/r/ABT-267 and ABT-333, with or without RBV (intent-to-treat \[ITT GT1b\] population); participants with missing data were counted as non-responders.

Virologic failure during treatment was defined as rebound (confirmed HCV RNA greater than or equal to the lower limit of quantitation \[≥ LLOQ\] after HCV RNA \< LLOQ during treatment, or confirmed increase from the lowest value post baseline in HCV RNA \[2 consecutive HCV RNA measurements \> 1 log10 IU/mL above the lowest value post baseline\] at any time point during treatment), or failure to suppress (HCV RNA ≥ LLOQ persistently during treatment with at least 6 weeks \[≥ 36 days\] of treatment).

Time frame: Baseline (Day 1), and Treatment Weeks 1, 2, 4, 6, 8, 10, and 12

Population: All randomized participants with HCV subgenotype 1B (GT1b) infection who received at least 1 dose of coformulated ABT-450/r/ABT-267 and ABT-333, with or without RBV (intent-to-treat \[ITT GT1b\] population).

Participants who completed treatment with plasma HCV RNA less than the lower limit of quantification (\<LLOQ) at the end of treatment were considered to have virologic relapse if they had confirmed HCV RNA ≥ LLOQ during the post-treatment period. 95% CI was calculated using the Wilson score method for the single proportion because the point estimate was 0%.

Time frame: Between End of Treatment (Week 12) and Post-treatment (up to Week 12 Post-Treatment)

Population: All randomized participants with HCV subgenotype 1B (GT1b) infection who received at least 1 dose of coformulated ABT-450/r/ABT-267 and ABT-333, with or without RBV (ITT GT1b population) with HCV RNA \< LLOQ at the final treatment visit and completed treatment.