Table 1. Distribution of clinico-pathological characteristics of patients.
| Characteristics | All Cases (%) | Training Set (%) | Testing Set (%) | p-value* |
| Number | 267 | 125 | 125 | 0.9469 |
| Age, yrs Median (range) | 70 (22–96) | 72 (22–96) | 70 (25–95) | |
| AJCC Stage | ||||
| I–II | 176 (65.9) | 82 (65.6) | 80 (64.0) | 0.8947 |
| III–IV | 91 (34.1) | 43 (34.4) | 45 (36.0) | |
| Gender | ||||
| Male | 122 (45.6) | 55 (44.0) | 59 (47.2) | 0.7033 |
| Female | 145 (54.3) | 70 (56.0) | 66 (52.8) | |
| Histotype | ||||
| Adenocarcinoma | 243 (91.0) | 114 (91.2) | 115 (92.0) | 0.9114 |
| Mucinous | 24 (9.0) | 11 (8.8) | 10 (8.0) | |
| Grade | ||||
| G1-2 | 212 (78.2) | 99 (79.2) | 101 (80.8) | 0.6091 |
| G3 | 31 (20.9) | 18 (14.4) | 13 (10.4) | |
| N/A | 24 (3.8) | 8 (6.4) | 11 (8.8) |
*testing the difference between training and testing set.