Fig. 2.

The multivariable Cox proportional hazards regression models for assessing the effect modification of tumor differentiation according to tumor size in patients with Por differentiated HCC (n = 286) and W-M differentiated HCC (n = 821). Each HR and its 95% CI of poor differentiation in patients with tumors measuring 2 and 5 cm. a OS. b RFS. Por, poorly differentiated; W-M, well- or moderately; HCC, hepatocellular carcinoma; OS, overall survival; RFS, recurrence-free survival; HRs, hazard ratios; CI, confidence interval.