Table 1.
Patient characteristics
| Characteristic | No. (%) (n = 372) |
|---|---|
| Median age (range, yr) | 66 (39–83) |
| Sex | |
| Male | 249 (66.9) |
| Female | 123 (33.1) |
| Histology | |
| SqCC | 146 (39.2) |
| ADC | 226 (60.8) |
| Smoking history | |
| Never | 146 (39.2) |
| Former/current | 226 (60.8) |
| Tumor size (cm) | |
| ≤ 3 | 143 (38.4) |
| > 3 | 229 (61.6) |
| Pleural invasion | |
| Absent | 219 (58.9) |
| Present | 153 (41.1) |
| Vascular invasion | |
| Absent | 313 (84.1) |
| Present | 59 (15.9) |
| Lymphatic invasion | |
| Absent | 209 (56.2) |
| Present | 163 (43.8) |
| Perineural invasion | |
| Absent | 342 (91.9) |
| Present | 30 (8.1) |
| Pathological stage | |
| I | 165 (42.7) |
| II | 99 (25.6) |
| III | 108 (28.0) |
SqCC, squamous cell carcinoma; ADC, adenocarcinoma.