Table 1 Patient demographics and baseline characteristics
Characteristic | Overall, N = 7,3441 | Training Cohort, N = 5,1411 | Internal Test Cohort, N = 2,2031 | P-value2 |
|---|---|---|---|---|
Sex | 0.633 | |||
 female | 5,617 (76%) | 3,940 (77%) | 1,677 (76%) |  |
 male | 1,727 (24%) | 1,201 (23%) | 526 (24%) |  |
Age | 0.623 | |||
 Mean (SD) | 44 (10) | 44 (10) | 44 (10) |  |
Tumor size | 0.477 | |||
 Mean (SD) | 0.64 (0.21) | 0.64 (0.20) | 0.63 (0.21) |  |
Tumor location | 0.069 | |||
 upper | 1,019 (14%) | 706 (14%) | 313 (14%) |  |
 middle | 2,340 (32%) | 1,617 (31%) | 723 (33%) |  |
 lower | 1,090 (15%) | 742 (14%) | 348 (16%) |  |
 multifocal | 2,895 (39%) | 2,076 (40%) | 819 (37%) |  |
HT | 0.502 | |||
 present | 1,756 (24%) | 1,218 (24%) | 538 (24%) |  |
 absent | 5,588 (76%) | 3,923 (76%) | 1,665 (76%) |  |
Microscopic capsular invasion | 0.822 | |||
 absent | 3,889 (53%) | 2,718 (53%) | 1,171 (53%) |  |
 present | 3,455 (47%) | 2,423 (47%) | 1,032 (47%) |  |
Bilaterality | 0.619 | |||
 absent | 5,633 (77%) | 3,935 (77%) | 1,698 (77%) |  |
 present | 1,711 (23%) | 1,206 (23%) | 505 (23%) |  |