Table 1. Demographic and characteristics of 1,254 patients.
| Variables | Patients | |
|---|---|---|
| Total (n=1,254) | Recurrence (n=22) | |
| Male | 759 (60.5) | 14 (63.6) |
| Age, y | 61.9±10.1 | 59.1±10.3 |
| 70≤ age | 287 (22.9) | 4 (16.0) |
| Smoking history | 561 (44.7) | 10 (45.5) |
| Operation | ||
| Sublobar resection | 26 (2.1) | 0 |
| Bilobectomy | 88 (7.0) | 4 (18.2) |
| Lobectomy | 1,046 (83.4) | 13 (59.1) |
| Pneumonectomy | 94 (7.5) | 5 (22.7) |
| Histology | ||
| Adenocarcinoma | 756 (60.3) | 8 (36.4) |
| Squamous | 393 (31.3) | 12 (54.5) |
| Mixed | 14 (1.1) | 1 (4.5) |
| Others | 91 (7.3) | 1 (4.5) |
| p-N stage | ||
| N0 | 997 (79.5) | 11 (50.0) |
| N1 | 153 (12.2) | 6 (27.3) |
| N2 | 104 (8.3) | 5 (22.7) |
| p-stage | ||
| I | 860 (68.6) | 7 (31.8) |
| II | 251 (20.0) | 9 (40.9) |
| IIIa | 143 (11.4) | 6 (27.3) |
| RFS, m | 115.8±41.1 | 83.0±19.8 |
| OS, m | 116.3±41.0 | 114.1±34.0 |
| Post-recurrence survival, m | – | 32.9±33.0 |
Data are presented as number of patients (percentage) or mean ± standard deviation. p-, pathologic; RFS, recurrence-free survival; OS, overall survival.