Surrogate end Points for Survival in Patients with Advanced Hepatocellular Carcinoma Treated with Immune Checkpoint Inhibitors
Andrew X. Zhu, Yong Lin, David Ferry, Ryan C. Widau, Abhijoy Saha
Abstract
Aim: The authors investigated surrogacy of radiology-based end points for clinical trials investigating immune checkpoint inhibitors in advanced hepatocellular carcinoma. Methods: Data were collected from electronic databases reporting median overall survival (OS), median progression-free survival (PFS) and objective response rate (ORR). Weighted Pearson correlation coefficients and 95% confidence intervals (CIs) were calculated. Results: 26 clinical trials (41 treatment arms, 5144 patients) were included. ORR (coefficient: 0.71; 95% CI: 0.52–0.84) and PFS (coefficient: 0.63; 95% CI: 0.21–0.92) were positively correlated with OS. Sensitivity analyses suggested liver function, line of therapy and study phase did not greatly impact results. The COSMIC-312 study negatively impacted the overall weighted correlation. Conclusion: ORR and PFS are positively correlated with OS in patients with advanced hepatocellular carcinoma.