Fig. 1

Kaplan–Meier survival analysis for reoperation after part-time patching. (Top) The total population of enrolled patients showed a 1.9% of reoperation ratio at 1 year, 20.3% at 2 years and 51.5% at 3 years. (Bottom) The low recurrence group showed a 1.1% of reoperation ratio at 1 year, 11.8% at 2 years, and 40.2% at 3 years. The high recurrence group showed relatively more reoperation: 3.1% of reoperation ratio at 1 year, 31.9% at 2 years, and 68.8% at 3 years. The p-value was 0.004 by log-rank test