Table 1.
Clinicopathological characteristics of patients and their tumors.
| Characteristics | Number of patients (%) | P a | ||
|---|---|---|---|---|
| Whole set | Training set | Validation set | ||
| Age, years | 0.865 | |||
| ≤50 | 86 (42.6%) | 61 (43.0%) | 25 (41.7%) | |
| >50 | 116 (57.4%) | 81 (57.0%) | 35 (58.3%) | |
| Menopausal status | 0.468 | |||
| Premenopausal | 75 (37.1%) | 55 (38.7%) | 20 (33.3%) | |
| Postmenopausal | 127 (62.9%) | 87 (61.3%) | 40 (66.7%) | |
| Histological grade | 0.183 | |||
| I | 35 (17.3%) | 27 (19.0%) | 8 (13.3%) | |
| II | 13 (6.4%) | 9 (6.3%) | 4 (6.7%) | |
| III | 134 (66.3%) | 96 (67.6%) | 38 (63.3%) | |
| Unknown | 20 (9.9%) | 10 (7.0%) | 10 (16.7%) | |
| Tumor size | 0.239 | |||
| ≤2cm | 85 (42.1%) | 64 (45.1%) | 21 (35.0%) | |
| >2-5cm | 111 (55.0%) | 75 (52.8%) | 36 (60.0%) | |
| >5cm | 6 (3.0%) | 3 (2.1%) | 3 (5%) | |
| Ki-67 | 0.820 | |||
| ≤20% | 28 (13.9%) | 20 (14.1%) | 8 (13.3%) | |
| >20% | 169 (83.7%) | 119 (83.8%) | 50 (83.3%) | |
| Unknown | 5 (2.5%) | 3 (2.1%) | 2 (3.3%) | |
| Chemotherapy | 0.644 | |||
| No | 6 (3.0%) | 4 (2.8%) | 2 (3.3%) | |
| Yes | 188 (93.1%) | 131 (92.3%) | 57 (95.0%) | |
| Unknown | 8 (4.0%) | 7 (4.9%) | 1 (1.7%) | |
| Radiotherapy | 0.861 | |||
| No | 180 (89.1%) | 127 (89.4%) | 53 (88.3%) | |
| Yes | 21 (10.4%) | 14 (9.9%) | 7 (11.7%) | |
| Unknown | 1 (0.5%) | 1 (0.7%) | 0 (0.0%) | |
| Metastasis | 0.345 | |||
| No | 190 (94.1%) | 135 (95.1%) | 55 (91.7%) | |
| Yes | 12 (5.9%) | 7 (4.9%) | 5 (8.3%) | |
a
P values were calculated using Pearson’s chi-square test or Fisher’s exact test to compare the clinical and pathological characteristics between the training set and validation set.