Regorafenib in patients (pts) with unresectable hepatocellular carcinoma (uHCC) in real-world practice in the United States (US): Final analysis of the prospective, observational REFINE study.

Abstract

e16114 Background: In the observational REFINE study of regorafenib (NCT03289273) in pts with uHCC, treatment-emergent adverse events (TEAEs) were consistent with those reported in the global, phase 3 RESORCE trial (YJ Kim, ILCA 2022). Median overall survival (OS) in the overall global cohort of REFINE was 13.2 months; here, we present the final analysis of the US pt cohort. Methods: REFINE was an international, prospective, multicenter study that enrolled pts with uHCC for whom a decision to treat with regorafenib was made by the treating physician prior to enrollment, according to the local health authority approved label. The primary objectives were safety, including incidence of TEAEs (MedDRA v25) and dose modifications due to TEAEs. Secondary endpoints included OS, progression-free survival (PFS), and duration of treatment (DoT). Results: Of the 1005 evaluable pts from the global cohort, 65 pts (6%) were from the USA. In the US cohort, 78% were male, 69% had ECOG PS 0/1, and the population was younger than the global cohort (54% were aged <65 years vs 45% in the global cohort). The most common HCC etiology was hepatitis C in the US cohort (52% vs 24% in the global cohort) and the second most common was alcohol use (34% vs 25% in the global cohort). A lower proportion of US pts had extrahepatic spread compared with the global cohort (48% vs 59%), while a similar proportion had vascular invasion (both 34%). Use of prior immune checkpoint inhibitors was more frequent in US pts than in the overall global cohort (25% vs 10%). Most US pts (88%) had received prior sorafenib, consistent with the global cohort (96%). However, a relatively lower proportion of pts received regorafenib as a second-line therapy (71% vs 84% in the global cohort). Transarterial chemoembolization was the most common prior non-systemic treatment (42%). Median DoT was 3.1 months (range <0.1–24.6 months) in US pts vs 3.7 months (range <0.1–38.9 months) in the global cohort. TEAEs were reported in 91% of US pts and apart from a lower incidence of diarrhea and hand–foot skin reaction (HFSR) in US pts, incidences of TEAEs were comparable to the global cohort. In addition, TEAEs resulting in dose modification were relatively lower in US pts (38% vs 45% in the global cohort). Median OS in US pts was 11.4 months (95% CI 8.4, 18.0), similar to that reported for the global cohort (median OS 13.2 months [95% CI 11.6, 14.8]). Conclusions: The REFINE real-world study confirmed the safety and effectiveness of regorafenib in a broader population of pts than in the RESORCE trial. The findings remained consistent in US pts with uHCC. Clinical trial information: NCT03289273 . [Table: see text]