Postoperative recurrence
| Variable | All (n=373) | Group A (n=146) | Group B (n=227) | P value |
| Postoperative recurrence | 44 (11.8%) | 5 (3.4%) | 39 (17.2%) | <0.01 |
| Treatment of recurrence | ||||
| Observation | 15 (34.1%) | 0 | 15 (38.4%) | 0.09 |
| Chest tube management | 6 (13.6%) | 2 (40.0%) | 4 (10.3%) | 0.07 |
| Reoperation | 23 (52.3%) | 3 (60.0%) | 20 (51.3%) | 1.00 |
| Site of recurrence | ||||
| Prestaple line | 29 (65.9%) | 1 (20.0%) | 28 (71.8%) | 0.01 |
| Other (S1+2, S6) | 6 (13.6%) | 3 (60.0%) | 3 (17.7%) | <0.01 |
| Unknown | 9 (20.5%) | 1 (20.0%) | 8 (20.5%) | 0.66 |
| Time to recurrence (day) | ||||
| Median (range) | 376 (8–1762) | 422 (26–750) | 364 (8–1762) | 0.77 |
S, segment