The purpose of this phase 3 study is to evaluate the efficacy and safety of ABT-493/ABT-530 in comparison to sofosbuvir plus ribavirin for 12 weeks in Hepatitis C Virus (HCV) Genotype 2 (GT2) infected participants.

This was a randomized, open-label, active-control, multicenter study to evaluate efficacy, safety, and pharmacokinetics of ABT-493/ABT-530 in chronic HCV GT2-infected direct-acting antiviral agent (DAA) treatment-naïve Japanese adult participants without cirrhosis. The participants were randomized in a 2:1 ratio to ABT-493/ABT-530 for 8 weeks (Arm A) and sofosbuvir plus ribavirin for 12 weeks (Arm B).

Inclusion Criteria:

• Females were postmenopausal for at least 2 years prior to screening; surgically sterile or had a vasectomized partner; or, if of childbearing potential and sexually active with a male partner, were currently using at least 1 effective method of birth control at the time of Screening and agreed to practice 1 effective method of birth control from Screening through 30 days after stopping study drug. Sexually active males were surgically sterile or, if sexually active with a female partner of childbearing potential, agreed to practice 1 effective form of birth control from Screening through 30 days after stopping study drug.

• Screening central laboratory result indicating HCV GT-2 infection without co-infection of any other genotype.

• Participant has positive anti-HCV antibody (Ab) and plasma HCV RNA viral load greater than or equal to 1000 IU/mL at Screening Visit.

• Chronic HCV infection defined as one of the following:

  • Positive for anti-HCV Ab and/or HCV RNA at least 6 months before Screening; or
  • A liver biopsy consistent with chronic HCV infection.

• Participant must be HCV treatment-naïve (i.e., patient has not received a single dose of any approved or investigational DAA) and non-cirrhotic. Prior HCV treatment using IFNs with or without ribavirin is acceptable. Previous HCV Interferon (IFN) based treatment must have been completed greater than or equal to 2 months prior to screening.

Exclusion Criteria:

• Females who were pregnant or planned to become pregnant, or breastfeeding or males whose partner was pregnant or planning to become pregnant during the study.

• Recent (within 6 months prior to study drug administration) history of drug or alcohol abuse that could preclude adherence to the protocol in the opinion of the investigator.

• Positive test result at Screening for hepatitis B surface antigen (HBsAg) or anti human immunodeficiency virus antibody (HIV Ab).

• Requirement for and inability to safely discontinue contraindicated medications or supplements at least 2 weeks or 10 half-lives (whichever is longer) prior to the first dose of any study drug.

• Clinically significant abnormalities, other than HCV-infection, based upon the results of a medical history, physical examination, vital signs, laboratory profile, and a 12-lead electrocardiogram (ECG) that make the participant an unsuitable candidate for this study in the opinion of the investigator, including, but not limited to:

  • Uncontrolled diabetes as defined by a glycated hemoglobin (hemoglobin A1C) level > 8.5% at the Screening Visit.
  • Active or suspected malignancy or history of malignancy (other than basal cell skin cancer or cervical carcinoma in situ) in the past 5 years, or any history of hepatocellular carcinoma (HCC).
  • Uncontrolled cardiac, respiratory, gastrointestinal, hematologic, neurologic, psychiatric, or other medical disease or disorder, which is unrelated to the existing HCV infection.

• Any cause of liver disease other than chronic HCV-infection, including but not limited to the following:

  • Hemochromatosis, alpha-1 antitrypsin deficiency, Wilson's disease, autoimmune hepatitis, alcoholic liver disease, or steatohepatitis considered to be the primary cause of the liver disease rather than concomitant/incidental with HCV infection.