TABLE 1.
Clinical and pathological parameters of patients involved in the present research
| Training set | Test set | P value | |
|---|---|---|---|
| n | 405 | 62 | |
| Gender (%) | .775 | ||
| Female | 217 (53.6) | 35 (56.5) | |
| Male | 188 (46.4) | 27 (43.5) | |
| Age (%) | .271 | ||
| <=65 | 199 (50.4) | 26 (41.9) | |
| >65 | 196 (49.6) | 36 (58.1) | |
| Smoking history (%) | .889 | ||
| Nonsmoker | 57 (14.5) | 8 (12.9) | |
| Smoker | 336 (85.5) | 54 (87.1) | |
| AJCC stage (%) | .578 | ||
| Stage I | 222 (55.5) | 33 (55.9) | |
| Stage II | 95 (23.8) | 11 (18.6) | |
| Stage III | 64 (16.0) | 10 (16.9) | |
| Stage IV | 19 (4.8) | 5 (8.5) | |
| T classification (%) | .351 | ||
| T1 | 142 (35.3) | 15 (24.2) | |
| T2 | 213 (53.0) | 39 (62.9) | |
| T3 | 31 (7.7) | 6 (9.7) | |
| T4 | 16 (4.0) | 2 (3.2) | |
| N classification (%) | .003 | ||
| N0 | 265 (66.9) | 38 (61.3) | |
| N1 | 73 (18.4) | 14 (22.6) | |
| N2 | 57 (14.4) | 7 (11.3) | |
| N3 | 1 (0.3) | 3 (4.8) | |
| M classification (%) | .864 | ||
| M0 | 260 (93.5) | 57 (91.9) | |
| M1 | 18 (6.5) | 5 (8.1) | |
| OS_event (%) | .118 | ||
| Alive | 309 (76.3) | 41 (66.1) | |
| Dead | 96 (23.7) | 21 (33.9) | |
| OS_time (median [min, max]) | 1.78 [0.09, 19.86] | 2.48 [0.10, 10.07] | .031 |
Abbreviation: OS, overall survival.