Table 1 Summary of the general clinicopathologic characteristics of patients in both training and testing datasets
Characteristic | TCGA (N = 435) | GSE39582 (N = 563) | GSE17536 (N = 177) | GSE37892 (N = 130) | GSE17537 (N = 55) |
|---|---|---|---|---|---|
N (%) | N (%) | N (%) | N (%) | N (%) | |
Age (years) | |||||
 Median | 66 | 68 | 66 | 68 | 62 |
 Range | 31–90 | 22–97 | 26–92 | 22–97 | 23–94 |
 < 65 | 166 (38.2) | 211 (37.5) | 78 (44.1) | 54 (41.5) | 32 (58.2) |
 ≥ 65 | 269 (51.8) | 351 (62.3) | 99 (55.9) | 76 (58.5) | 23 (41.8) |
Sex | |||||
 Male | 202 (46.4) | 309 (54.9) | 96 (54.2) | 69 (53.1) | 26 (47.3) |
 Female | 233 (53.6) | 253 (44.9) | 81 (45.8) | 61 (46.9) | 29 (52.7) |
T Statusa | |||||
 T1–2 | 86 (19.8) | 56 (9.9) | NA | NA | NA |
 T3–4 | 345 (79.3) | 483 (85.8) | NA | NA | NA |
N Statusa | |||||
 N0 | 254 (58.4) | 299 (53.1) | NA | NA | NA |
 N1 | 100 (23.0) | 133 (23.6) | NA | NA | NA |
 N2 | 78 (17.9) | 98 (17.4) | NA | NA | NA |
M Statusa | |||||
 M0 | 318 (73.1) | 479 (85.1) | NA | NA | NA |
 M1 | 60 (13.8) | 61 (10.8) | NA | NA | NA |
 MX | 47 (10.8) | 2 (0.4) | NA | NA | NA |
Stage | |||||
 I | 73 (16.8) | 32 (5.7) | 24 (13.6) |  | 4 (7.3) |
 II | 167 (38.4) | 262 (46.5) | 57 (32.2) | 73 (56.2) | 15 (27.3) |
 III | 124 (28.5) | 204 (36.2) | 57 (32.2) | 57 (43.8) | 19 (34.5) |
 IV | 60 (13.8) | 60 (10.7) | 39 (22) |  | 17 (30.9) |