Table 1.
Baseline characteristics
| level | Overall | Training set | Test set | p | |
|---|---|---|---|---|---|
| n | 497 | 348 | 149 | ||
| Age | 46 | 46 | 48 | 0.713 | |
| (median [IQR]) | [35.00, 58.00] | [36.00, 57.25] | [34.00, 59.00] | ||
| gender (%) | female | 363 (73.0) | 248 (71.3) | 115 (77.2) | 0.211 |
| male | 134 (27.0) | 100 (28.7) | 34 (22.8) | ||
| T (%) | T1 | 142 (28.6) | 103 (29.6) | 39 (26.2) | 0.746 |
| T2 | 162 (32.6) | 109 (31.3) | 53 (35.6) | ||
| T3 | 169 (34.0) | 118 (33.9) | 51 (34.2) | ||
| T4 | 22 ( 4.4) | 16 ( 4.6) | 6 ( 4.0) | ||
| TX | 2 ( 0.4) | 2 ( 0.6) | 0 ( 0.0) | ||
| N (%) | N0 | 227 (45.7) | 166 (47.7) | 61 (40.9) | 0.222 |
| N1 | 221 (44.5) | 152 (43.7) | 69 (46.3) | ||
| NX | 49 ( 9.9) | 30 ( 8.6) | 19 (12.8) | ||
| M (%) | M0 | 282 (56.7) | 197 (56.6) | 85 (57.0) | 0.566 |
| M1 | 8 ( 1.6) | 4 ( 1.1) | 4 ( 2.7) | ||
| MX | 206 (41.4) | 146 (42.0) | 60 (40.3) | ||
| Unknow | 1 ( 0.2) | 1 ( 0.3) | 0 ( 0.0) | ||
| stage (%) | I | 279 (56.1) | 199 (57.2) | 80 (53.7) | 0.766 |
| II | 52 (10.5) | 38 (10.9) | 14 ( 9.4) | ||
| III | 111 (22.3) | 76 (21.8) | 35 (23.5) | ||
| IV | 53 (10.7) | 34 ( 9.8) | 19 (12.8) | ||
| Unknow | 2 ( 0.4) | 1 ( 0.3) | 1 ( 0.7) | ||
| PFI (%) | 0 | 446 (89.7) | 313 (89.9) | 133 (89.3) | 0.946 |
| 1 | 51 (10.3) | 35 (10.1) | 16 (10.7) | ||