Table 3. Clinical characteristics and recurrence-free probability for postoperative recurrence of spontaneous pneumothorax.

Patients	5-year RFP (%)	P value
Sex
Men/women	65.6/81.5	0.178
Type of SP
Primary/secondary	47.0/74.9	<0.001
Smoking habits
Ever/never	86.9/48.9	<0.001
Laterality of SP
Left/right	50.0/82.6	0.049
History of ipsilateral SP
Yes/no	53.8/75.8	0.179
History of contralateral SP
Yes/no	73.3/61.8	0.273
Surgical approach
Thoracoscopic surgery/thoracotomy	59.2/94.7	0.008
Surgical methods
Bullectomy/bulla ligation	64.5/61.1	0.181
Pleural Reinforcement
ORC/PGA/fibrin glue/none	56.7/86.4/96.2/72.2	0.281/0.261/0.038/0.411
Operative Time
<100 min/>100 min	43.6/81.7	<0.001
Surgeon
Resident/fellow/specialist	40.0/77.5/84.4	0.008/0.070/0.486
Age
<30 years/>30 years	46.3/93.7	<0.001

RFP, recurrence-free probability; ORC, oxidized regenerated cellulose mesh; PGA, absorbable polyglycol acid sheets; SP, spontaneous pneumothorax.