Treatment and re-treatment results of HCV patients in the DAA era

PLoS One. 2020 May 5;15(5):e0232773. doi: 10.1371/journal.pone.0232773. eCollection 2020.


Background: Re-treatment in patients with a chronic hepatitis C virus (HCV) infection and a previous failure to direct-acting antiviral (DAA) treatment remains a challenge. Therefore, we investigated the success rate of treatment and re-treatment regimens used at our center from October 2011 to March 2018.

Methods: A retrospective analysis of DAA-based HCV therapies of 1096 patients was conducted. Factors associated with a virological relapse were identified by univariable and multivariable logistic regression, treatment success of the re-treatment regimens was evaluated by an analysis of sustained virological response (SVR) rates in patients with a documented follow-up 12 weeks after the end of treatment.

Results: Of 1096 patients treated with DAA-based regimens, 91 patients (8%) were lost to follow-up, 892 of the remaining 1005 patients (89%) achieved an SVR12. Most patients (65/113, 58%) who experienced a virological relapse received an interferon-based DAA regimen. SVR rates were comparable in special cohorts like liver transplant recipients (53/61, 87%) and people with a human immunodeficiency virus (HIV) coinfection (41/45, 91%). On multivariable analysis, interferon-based DAA therapy was associated with treatment failure (odds ratio 0.111, 95%-confidence interval 0.054-0.218) among others. One hundred seventeen patients with multiple DAA treatment courses were identified, of which 97 patients (83%) experienced a single relapse, but further relapses after two (18/117, 15%) or even three (2/117, 2%) treatment courses were also observed. Eighty-two of 96 (85%) re-treatment attempts with all-oral DAA regimens were successful after an initial treatment failure.

Conclusion: Overall, DAA re-treatments were highly effective in this real-world cohort and only a minority of patients failed more than two treatment courses. Switching to-or addition of-a new drug class seem to be valid options for the re-treatment of patients especially after failure of an interferon-based regimen.

Publication types

  • Clinical Trial

MeSH terms

  • Adult
  • Antiviral Agents / therapeutic use*
  • Female
  • Hepacivirus / drug effects
  • Hepatitis C, Chronic / drug therapy*
  • Hepatitis C, Chronic / pathology
  • Humans
  • Interferons / therapeutic use*
  • Male
  • Middle Aged
  • Recurrence
  • Retrospective Studies
  • Sustained Virologic Response
  • Treatment Failure
  • Treatment Outcome


  • Antiviral Agents
  • Interferons

Grants and funding

The authors received no specific funding for this work