Table 1 Frequency distributions of demographic and clinicopathological features of LUSC cases
Variables | Training set (n = 134) | Validation set (n = 94) | P value |
|---|---|---|---|
Age ( Mean ± SD, y) | 68.3 ± 7.6 | 67.5 ± 9.0 | 0.445a |
Gender | |||
 Male | 101 (73.4%) | 67 (71.3%) | 0.489b |
 Female | 33 (24.6%) | 27 (28.7%) |  |
Smoking status | |||
 Yes | 124 (92.5%) | 89 (94.5%) | 0.520b |
 No | 10 (7.5%) | 5 (5.3%) |  |
T stages | |||
 1 | 33 (24.6%) | 18 (19.1%) | 0.324b |
 2 | 84 (62.7%) | 58 (61.8%) |  |
 3 + 4 | 17 (12.7%) | 18 (19.1%) |  |
N stages | |||
 0 | 91 (67.9%) | 57 (60.6%) | 0.515b |
 1 | 30 (22.4%) | 25 (26.6%) |  |
 2 + 3 | 13 (9.7%) | 12 (12.8%) |  |
M stages | |||
 0 | 133 (99.2%) | 91 (96.8%) | 0.166b |
 1 | 1 (0.8%) | 3 (3.2%) |  |
Clinical stages | |||
 I | 72 (53.7%) | 48 (51.1%) | 0.248b |
 II | 38 (28.4%) | 21 (22.3%) |  |
 III + IV | 24 (17.9%) | 25 (26.6%) |  |
Survival status | |||
 Dead | 53 (39.6%) | 39 (41.5%) | 0.678c |
 Alive | 81 (60.4%) | 55 (58.5%) |  |