Prognostic factors of 
REGRESSION
We initially conducted COX regression analysis to further identify independent prognostic factors associated with patients' RFS. As shown in Table Prognostic factors of RFS by modified COX regression.Abbreviations: RFA, radiofrequency ablation; RFS, recurrence‐free survival.Subgroup analysis of RFS by Cox regression based on independent assessment. RFS, recurrence‐free survival.