Fig. 6
From: Prognostic role of PD-L1 for HCC patients after potentially curative resection: a meta-analysis
Meta-regression analysis for overall survival and recurrence-free survival in HCC. Bubble plot with a fitted meta-regression line of the log hazard ratio for a, e publication year, b, f sample size, c, g region of research, and d, h positive rate of PD-L1 (%). a–d Represent overall survival; e–h represent recurrence-free survival. The size of circles is proportional to the weight of each study in the fitted random-effects meta-regression. PD-L1 programmed death ligand 1, HCC hepatocellular carcinoma