Table 1.
Patients' clinicopathological data
| Variables | Modeling group (n = 7046) | Validation group (n = 3487) | ||
|---|---|---|---|---|
| n | % | n | % | |
| Age | ||||
| 15–35 | 285 | 4.0 | 161 | 4.6 |
| 36–45 | 615 | 8.7 | 301 | 8.6 |
| 46–55 | 1606 | 22.8 | 816 | 23.4 |
| 56–65 | 2001 | 28.4 | 966 | 27.7 |
| 66–75 | 1402 | 19.9 | 671 | 19.2 |
| 76–85 | 842 | 12.0 | 440 | 12.6 |
| 85+ | 292 | 4.2 | 132 | 3.8 |
| Sex | ||||
| Male | 4224 | 59.9 | 2148 | 61.6 |
| Female | 2825 | 40.1 | 1339 | 38.4 |
| Site | ||||
| HP | 445 | 6.3 | 212 | 6.1 |
| Cheek | 665 | 9.4 | 353 | 10.1 |
| MF | 1622 | 23.0 | 774 | 22.2 |
| Tongue | 4314 | 61.2 | 2148 | 61.6 |
| Race | ||||
| White | 5776 | 82.0 | 2902 | 83.2 |
| Black | 595 | 8.4 | 252 | 7.2 |
| Others | 675 | 9.6 | 333 | 9.5 |
| Origin | ||||
| NSHL | 6444 | 91.5 | 3193 | 91.6 |
| SHL | 602 | 8.5 | 294 | 8.4 |
| Grade | ||||
| I | 1683 | 23.9 | 813 | 23.3 |
| II | 4050 | 57.5 | 2020 | 57.9 |
| III | 1278 | 18.1 | 628 | 18.0 |
| IV | 35 | 0.5 | 26 | 0.7 |
| Surgery | ||||
| Performed | 6079 | 86.3 | 3034 | 87.0 |
| None | 967 | 13.7 | 453 | 13.0 |
| Radiation | ||||
| Yes | 3194 | 45.3 | 1565 | 44.9 |
| No | 3852 | 54.7 | 1922 | 55.1 |
| T stage | ||||
| T1 | 3273 | 46.5 | 1592 | 45.7 |
| T2 | 1981 | 28.1 | 1059 | 30.4 |
| T3 | 723 | 10.3 | 339 | 9.7 |
| T4 | 1069 | 15.2 | 497 | 14.2 |
| N stage | ||||
| N0 | 4626 | 65.7 | 2335 | 67.0 |
| N1 | 1001 | 14.2 | 483 | 13.9 |
| N2 | 1352 | 19.2 | 637 | 18.2 |
| N3 | 67 | 1.0 | 32 | 0.9 |
| M stage | ||||
| M0 | 6941 | 98.5 | 3442 | 98.7 |
| M1 | 105 | 1.5 | 45 | 1.3 |
HP, Hard Palate; MF, Mouth Floor. Others, American Indian/AK Native, Asian/Pacific Islander; NSHL, Nonspanish‐Hispanic‐Latino; Grade I, Well differentiated; II, Moderately differentiated; III, Poorly differentiated; IV, Undifferentiated.