Table 1 Demographics and clinical characteristics of the whole training and validation cohorts
Variables | Type | Total (n=1015) | Validation (n=405) | Train (n=610) | P value |
|---|---|---|---|---|---|
Age | <20 | 484 (47.68%) | 201 (49.63%) | 283 (46.39%) | 0.535 |
20–49 | 327 (32.22%) | 123 (30.37%) | 204 (33.44%) |  | |
≥50 | 204 (20.1%) | 81 (20%) | 123 (20.16%) |  | |
Sex | Male | 547 (53.89%) | 230 (56.79%) | 317 (51.97%) | 0.1484 |
Female | 468 (46.11%) | 175 (43.21%) | 293 (48.03%) | Â | |
Race | White | 753 (74.19%) | 304 (75.06%) | 449 (73.61%) | 0.346 |
Black | 164 (16.16%) | 58 (14.32%) | 106 (17.38%) | Â | |
Other | 98 (9.66%) | 43 (10.62%) | 55 (9.02%) | Â | |
Size | <5 | 142 (13.99%) | 56 (13.83%) | 86 (14.1%) | 0.514 |
5–10 | 427 (42.07%) | 179 (44.2%) | 248 (40.66%) |  | |
≥10 | 446 (43.94%) | 170 (41.98%) | 276 (45.25%) |  | |
Primary site | External | 768 (75.67%) | 320 (79.01%) | 448 (73.44%) | 0.0695 |
Axial | 130 (12.81%) | 49 (12.1%) | 81 (13.28%) | Â | |
Other | 117 (11.53%) | 36 (8.89%) | 81 (13.28%) | Â | |
Grade | High | 128 (12.61%) | 51 (12.59%) | 77 (12.62%) | 1 |
Low | 887 (87.39%) | 354 (87.41%) | 533 (87.38%) | Â | |
T | T1 | 419 (41.28%) | 167 (41.23%) | 252 (41.31%) | 0.8028 |
T2 | 570 (56.16%) | 226 (55.8%) | 344 (56.39%) | Â | |
T3 | 26 (2.56%) | 12 (2.96%) | 14 (2.3%) | Â | |
Surgery | No | 95 (9.36%) | 36 (8.89%) | 59 (9.67%) | 0.7569 |
Yes | 920 (90.64%) | 369 (91.11%) | 551 (90.33%) | Â |