Outcomes of robotic liver resection and intraoperative radiofrequency ablation for hepatocellular carcinoma in posterior segments VII and VIII

Table 7 Log-rank test results comparing overall survival between unstratified and risk-stratified subgroups of the robotic liver resection group in the de novo group prior to propensity score matching

	Gender	Major tumor size	Aggregate tumor size
Low risk vs unstratified R-LR	0.208	0.079	0.139
High risk vs unstratified R-LR	0.069	0.370	0.281
Low risk vs unstratified RIO-RFA	0.068	0.011	0.036
High risk vs unstratified RIO-RFA	0.595	0.867	0.971

R-LR: Robotic liver resection; RIO-RFA: Robotic intraoperative radiofrequency ablation.