Table 1.
Patient Characteristics.
| Characteristics | Total (N = 346) | Train (N = 231) | Test (N = 115) | p-Value |
|---|---|---|---|---|
| Age: median (range) | 61.0 (16–85) | 61.0 (17–85) | 61.0 (16–82) | 0.679 |
| Gender | 0.608 | |||
| Male | 232 (67.1%) | 157 (68.0%) | 75 (65.2%) | |
| Female | 114 (32.9%) | 74 (32.0%) | 40 (34.8%) | |
| T classification | 0.360 | |||
| T0-T1 | 169 (48.8%) | 114 (49.3%) | 55 (47.8%) | |
| T2 | 88 (25.4%) | 62 (26.8%) | 26 (22.6%) | |
| T3-T4 | 88 (25.4%) | 55 (23.8%) | 33 (28.7%) | |
| NA | 1 (0.3%) | 0 | 1 (0.9%) | |
| N classification | 0.703 | |||
| N0 | 241 (69.7%) | 165 (71.4%) | 76 (66.1%) | |
| N1 | 3 (0.9%) | 2 (0.9%) | 1 (0.9%) | |
| NX | 101 (29.2%) | 63 (27.2%) | 38 (33.0%) | |
| NA | 1 (0.3%) | 1 (0.4%) | 0 | |
| M classification | 0.177 | |||
| M0 | 252 (72.8%) | 173 (74.9%) | 79 (68.7%) | |
| M1 | 3 (0.9%) | 3 (1.3%) | 0 | |
| MX | 91 (26.3%) | 55 (23.8%) | 36 (31.3%) | |
| TNM stage | 0.487 | |||
| I–II | 242 (69.9%) | 166 (71.9%) | 76 (66.1%) | |
| III–IV | 85 (24.6%) | 54 (23.4%) | 31 (27.0%) | |
| NA | 19 (5.5%) | 11 (4.8%) | 8 (6.9%) | |
| OS (months): median | 19.56 | 19.56 | 19.53 | 0.903 |
| Event | 0.654 | |||
| Alive | 223 (64.5%) | 147 (63.6%) | 76 (66.1%) | |
| Dead | 123 (35.5%) | 84 (36.4%) | 39 (33.9%) |