Fig. 2
Overall recurrence rate of pneumothorax after pleural covering surgery for patients with Birt-Hogg-Dubé syndrome: Kaplan-Meier graph estimating the recurrence probability after a total of 90 covering surgeries to prevent pneumothorax, as follows: 2.7% at 2.5 years, 7.1% at 5.0 years, and 32% at 7.5 years, with a median postoperative follow-up period of 48 (range: 6.7–94) months