TABLE 1.
Clinical Characteristic of the Training and Validation Cohorts.
| Training cohort | Validation cohort | p value | |
| Number of patients | 226 | 98 | |
| LNM | 25 (11.1%) | 11 (11.2%) | 0.966¶ |
| Body mass index (kg/m2) | 34.89 ± 9.19 | 33.37 ± 10.04 | 0.621* |
| Age (year) | 62.35 ± 11.69 | 63.88 ± 10.67 | 0.491* |
| Menopausal status | |||
| Premenopausal | 17 (7.5%) | 6 (6.1%) | 0.095¶ |
| Perimenopausal | 11 (4.9%) | 3 (3.1%) | |
| Postmenopausal | 174 (77.0%) | 86 (87.8%) | |
| Unknown | 24 (10.6%) | 3 (3.1%) | |
| G stage | |||
| G1 | 54 (23.9%) | 28 (28.6%) | 0.612¶ |
| G2 | 66 (29.2%) | 29 (29.5%) | |
| G3 | 106 (46.9%) | 41 (41.8%) | |
| Surgical approach | |||
| Open | 139 (61.5%) | 56 (57.1%) | 0.661¶ |
| Minimally invasive | 81 (35.8%) | 38 (38.8%) | |
| Unknown | 6 (2.7%) | 4 (4.1%) |
Data are expressed as mean ± SD or number (percentage).
*The p value was calculated by the t test.
¶The p value was calculated by the χ2 test.
LNM, lymph node metastasis.