Fig. 3.

Comparing Total Pleural Covering (TPC) with Lower Pleural Covering (LPC): recurrence rate after pneumothorax surgery. Kaplan-Meier estimates of the recurrence probability after 52 TPCs to prevent pneumothorax, as follows; 0% at 2.5, 5.0 , and 7.5 years after surgery (dotted line). The recurrence probability after 38 LPCs to prevent pneumothorax, as follows: 5.4% at 2.5 years; 12% at 5.0 years; and 42% at 7.5 years after surgery (solid black line). The rog-rank test shows that TPC is superior to LPC (P = 0.032)