Kaplan-Meier RFS (a) and PFS (b) in patients treated with the Foley catheter alone in the IPP group compared with those in the EPP group. The median follow-up duration was 31.8 (0.4–120.3) months for the IPP treated with the Foley catheter alone group and 42.7 (4.9–136.8) months for the EPP group. RFS, recurrence-free survival; PFS, progression-free survival; IPP, intraperitoneal perforation; EPP, extraperitoneal perforation.