A Study to Evaluate the Efficacy and Safety of Glecaprevir/Pibrentasvir (ABT-493/ABT-530) in Treatment-Naive and Treatment-Experienced, Non-Cirrhotic Asian Adults With Chronic Hepatitis C Virus Genotype (GT) 1 to GT6 Infection With or Without Human Immunodeficiency Virus Co-Infection

This study will evaluate the efficacy and safety of glecaprevir/pibrentasvir (ABT-493/ABT-530) in non-cirrhotic chronic hepatitis C virus (HCV) genotype (GT)1 to GT6-infected Asian participants with or without human immunodeficiency virus (HIV) co-infection who are HCV treatment-naïve or treatment-experienced with interferon (IFN) with or without ribavirin (RBV), OR sofosbuvir with RBV with or without IFN.

Randomization was stratified by geographic region (China, South Korea, Singapore), genotype (GT1, GT2, combined GT3 - 6), and HCV/HIV co-infection status (co-infected, not co-infected). In China, eligible participants were randomized to Arm A or Arm B (defined below) in the following ratios: 2:1 for GT1, 2:1 for GT2, and 2:1 for combined GT3-6. In South Korea and Singapore, eligible participants were randomized to Arm A or Arm B in the following ratios: 2:1 for GT1 and 2:1 for GT2.

All Primary and Secondary Outcome Measures were pre-specified to be analyzed only in Arm A.

Eligibility Criteria:
Inclusion Criteria:

* Must be of Asian descent
* Screening laboratory result indicating hepatitis C virus (HCV) genotype (GT) 1, 2, 3, 4, 5 or 6 infection.
* Positive anti-HCV antibody (Ab) and HCV ribonucleic acid (RNA) viral load ≥ 1000 IU/ mL at Screening Visit.
* Chronic HCV infection defined as one of the following:

  * Positive for anti-HCV Ab or HCV RNA at least 6 months before Screening; or
  * A liver biopsy consistent with chronic HCV infection
* HCV treatment-naïve to any approved or investigational HCV treatment or treatment-experienced with interferon (IFN) (alpha, beta or pegylated interferon\[pegIFN\] with or without ribavirin, OR sofosbuvir with RBV with or without IFN. Previous treatment must have been completed ≥ 8 weeks prior to screening.
* Participant must be documented as non-cirrhotic.
* Participants enrolled with human immunodeficiency virus (HIV)-1 and HCV co-infection must also meet the following criteria:

  * Positive test result for human immunodeficiency virus antibody (HIV Ab) at Screening
  * Naïve to treatment with any antiretroviral therapy (ART) with a cluster of differentiation (CD)4+ count greater than or equal to 500 cells/mm³ (or CD4+ percent ≥ 29%)
  * On a stable, qualifying HIV-1 ART regimen with CD4+ count ≥ 200 cells/mm³ (or CD4+ % ≥ 14%) at Screening and plasma HIV-1 RNA below lower limit of quantification (LLOQ) by an approved plasma HIV-1 RNA quantitative assay at Screening and at least once during the 12 months prior to Screening.

Exclusion Criteria:

* Positive test result for Hepatitis B surface antigen (HbsAg) or positive test result for hepatitis B virus (HBV) deoxyribonucleic acid (DNA) if HBsAg is negative.
* Any cause of liver disease other than chronic HCV-infection.
* HCV genotype performed during screening indicating co-infection with more than one HCV genotype
* Clinically significant abnormalities, other than HCV infection or HCV/HIV co-infection
* Chronic human immunodeficiency virus, type 2 (HIV-2) infection

Additional Exclusion Criteria for participants with HCV/HIV Co-Infection:

* For participants on stable ART, taking anti-retroviral agent(s) other than those permitted
* Treatment for an acquired immunodeficiency syndrome (AIDS)-associated opportunistic infection within 12 months of Screening or prophylaxis for an AIDS-associated opportunistic infection within 6 months of screening
* Diagnosis of any clinical AIDS-defining event within 12 months prior to Screening.