Table 1. Characteristics of patients and gene expressions of TWIST1 and TWIST2.
| Variable | N | % | Range |
|---|---|---|---|
| Gender | 521 | ||
| Female | 137 | 26.3 | |
| Male | 384 | 73.7 | |
| Race | 506 | ||
| Caucasian | 446 | 88.1 | |
| African American | 47 | 9.3 | |
| Asian | 11 | 2.2 | |
| American Native | 2 | 0.4 | |
| Smoking | 508 | ||
| No | 117 | 23.0 | |
| Yes | 391 | 77.0 | |
| Disease Stage | 507 | ||
| I | 20 | 3.9 | |
| II | 98 | 19.3 | |
| III | 105 | 20.7 | |
| IV | 284 | 56.1 | |
| Tumor Grade | 517 | ||
| I | 63 | 12.2 | |
| II | 304 | 58.8 | |
| III | 150 | 29.0 | |
| Tumor site | 521 | ||
| Tongue | 200 | 38.4 | |
| Pharynx | 135 | 25.9 | |
| other | 186 | 35.7 | |
| Metastasis Stage | 516 | ||
| M0 | 490 | 95.0 | |
| M1-MX | 26 | 5.0 | |
| Radiotherapy | 183 | ||
| No | 62 | 33.9 | |
| Yes | 121 | 66.1 | |
| Death | 451 | ||
| No | 229 | 57.4 | |
| Yes | 222 | 42.6 | |
| Age (Mean ± SD*, years) | 520 | 60.9 ± 11.9 | 19 - 90 |
| Overall survival (months) | 519 | 21.2 | 0.07 - 210.8 |
| TWIST1 (Median) | 522 | 168.2 | 4.1 - 6812 |
| TWIST2 (Median) | 522 | 55 | 0.9 - 407 |
* SD: standard deviation.