Table 1. Patient clinical characteristics.
| Characteristic | Evaluable analysis set (N = 1103) |
|---|---|
| Age at diagnosis (years) | |
| Mean (SD) | 68.3 (10.0) |
| Median | 69 |
| Min, Max | 23, 96 |
| Sex | |
| Male | 430 (39.0) |
| Female | 673 (61.0) |
| Smoking status | |
| Never | 192 (17.4) |
| Former | 751 (68.1) |
| Current | 160 (14.5) |
| Surgical procedure | |
| Pneumonectomy/bilobectomy/lobectomy | 824 (74.7) |
| Segmentectomy | 96 (8.7) |
| Wedge resection | 183 (16.6) |
| Tumor size (centimeters) | |
| Mean (SD) | 2.1 (1.0) |
| Median | 2.0 |
| Min, Max | 0.3, 5.0 |
| Pathological stage | |
| IA | 799 (72.4) |
| IB | 304 (27.6) |
| Pleural invasion | |
| PLX/PL0 | 931 (84.4) |
| PL1 | 154 (14.0) |
| PL2 | 18 (1.6) |
| Lymphatic invasion | |
| Absent | 750 (68.0) |
| Present | 353 (32.0) |
| Vascular invasion | |
| Absent | 812 (73.6) |
| Present | 291 (26.4) |
| Morphological grade | |
| Low | 156 (14.1) |
| Intermediate | 690 (62.6) |
| High | 257 (23.3) |
Note. Data are no. (%), unless otherwise noted. Max = maximum, Min = minimum, SD = standard deviation.