Table 1.
Differences in clinical characteristics between training and testing sets.
| Covariates | Type | Total | Testing | Training | p value |
|---|---|---|---|---|---|
| Age | ≤65 | 232 (62.7%) | 118 (63.78%) | 114 (61.62%) | 0.7471 |
| Age | >65 | 138 (37.3%) | 67 (36.22%) | 71 (38.38%) | |
| Gender | FEMALE | 121 (32.7%) | 59 (31.89%) | 62 (33.51%) | 0.8246 |
| Gender | MALE | 249 (67.3%) | 126 (68.11%) | 123 (66.49%) | |
| Grade | G1 | 55 (14.86%) | 26 (14.05%) | 29 (15.68%) | 0.6769 |
| Grade | G2 | 177 (47.84%) | 87 (47.03%) | 90 (48.65%) | |
| Grade | G3 | 121 (32.7%) | 66 (35.68%) | 55 (29.73%) | |
| Grade | G4 | 12 (3.24%) | 5 (2.7%) | 7 (3.78%) | |
| Grade | Unknown | 5 (1.35%) | 1 (0.54%) | 4 (2.16%) | |
| Stage | Stage I | 171 (46.22%) | 85 (45.95%) | 86 (46.49%) | 0.9642 |
| Stage | Stage II | 85 (22.97%) | 43 (23.24%) | 42 (22.7%) | |
| Stage | Stage III | 85 (22.97%) | 44 (23.78%) | 41 (22.16%) | |
| Stage | Stage IV | 5 (1.35%) | 3 (1.62%) | 2 (1.08%) | |
| Stage | Unknown | 24 (6.49%) | 10 (5.41%) | 14 (7.57%) | |
| T | T1 | 181 (48.92%) | 92 (49.73%) | 89 (48.11%) | 0.5286 |
| T | T2 | 93 (25.14%) | 44 (23.78%) | 49 (26.49%) | |
| T | T3 | 80 (21.62%) | 40 (21.62%) | 40 (21.62%) | |
| T | T4 | 13 (3.51%) | 9 (4.86%) | 4 (2.16%) | |
| T | Unknown | 3 (0.81%) | 0 (0%) | 3 (1.62%) | |
| M | M0 | 266 (71.89%) | 139 (75.14%) | 127 (68.65%) | 1 |
| M | M1 | 4 (1.08%) | 2 (1.08%) | 2 (1.08%) | |
| M | Unknown | 100 (27.03%) | 44 (23.78%) | 56 (30.27%) | |
| N | N0 | 252 (68.11%) | 136 (73.51%) | 116 (62.7%) | 0.7399 |
| N | N1 | 4 (1.08%) | 3 (1.62%) | 1 (0.54%) | |
| N | unknown | 114 (30.81%) | 46 (24.86%) | 68 (36.76%) |