Fig. 3

Kaplan–Meier analysis of survival rate (A) and recurrence rate (B) in IORT and non-IORT groups. Significant differences were determined by log-rank (Mantel–Cox) analysis for (A) overall survival (IORT median survival 59.00 and non-IORT median survival 48.70) and (B) recurrence-free survival (IORT median survival 47.03 and non-IORT median survival 32.87). IORT: intraoperative radiotherapy