Treatment rates and factors associated with direct-acting antiviral therapy for insured patients with hepatitis C-related hepatocellular carcinoma - A real-world nationwide study

Background: Since the inception of the interferon-free direct-acting antiviral agents (DAAs) for hepatitis C virus (HCV) infection, guidelines as to who should receive this potentially curative treatment have evolved. Treatment with DAAs is now considered for all patients except for those considered moribund.Aim: To determine the DAA treatment rate for patients with HCV-related hepatocellular carcinoma (HCC).Methods: This was a retrospective study from January 2015 to March 2021 of a national sample of privately insured patients with HCV-related HCC using Optum's Clinformatics (R) Data Mart (CDM) Database - a large, de-identified, adjudicated claims database.Results: We identified 3922 patients with HCV-related HCC: 922 (23.5%) received DAA. Compared to untreated patients, DAA-treated patients were younger (65.2 +/- 7.5 vs. 66.4 +/- 7.5 years, p < 0.001), more frequently saw a gastroenterology/infectious disease (GI/ID) physician (41.2% vs. 34.2%), and had decompensated cirrhosis (56% vs. 53%, p = 0.001). In multivariable analysis, younger age (HR: 0.98, 95% CI: 0.97-0.99, p < 0.001), GI/ID care (HR: 3.06, 95% CI: 2.13-4.51, p < 0.001), and having cirrhosis (compensated: HR: 1.60, 95% CI: 1.18-2.21, p = 0.003; decompensated: HR: 1.45, 95% CI: 1.07-1.98, p = 0.02) were associated with receiving DAA treatment, but not sex, race, or ethnicity. DAA-treated patients had significantly higher 5-year survival than untreated patients (47.2% vs. 35.2%, p < 0.001). Following adjustment for age, sex, race/ethnicity, Charlson Comorbidity Index, and HCC treatment, receiving DAA treatment was associated with lower mortality (aHR: 0.61, 95% CI: 0.53-0.69, p < 0.001).Conclusion: DAA treatment remains underutilised in insured patients with HCV-related HCC; fewer than one in four patients received treatment. Seeing a specialist and having decompensated cirrhosis were predictors for DAA treatment; additional efforts are needed to increase awareness of HCV treatment.