Table 4. Multivariate analysis results of factors affecting the prognosis.
| Factors | B | SE | Wald | P | Exp(B) |
|---|---|---|---|---|---|
| Age | -.282 | .404 | .486 | .486 | .754 |
| Diameter of primary tumor ≤ 4 cm | -1.333 | .407 | 10.718 | .001 | .264 |
| Limited to gland | -.485 | .466 | 1.081 | .299 | .616 |
| Strap muscle invasion | .350 | .419 | .699 | .403 | 1.419 |
| Trachea invasion | .254 | .432 | .345 | .557 | 1.289 |
| Esophageal invasion | .181 | .448 | .162 | .687 | 1.198 |
| Lymph node metastasis | -.231 | .362 | .406 | .524 | .794 |
| Distant metastasis | 1.235 | .397 | 9.678 | .002 | 3.438 |
| Surgery | -1.104 | .532 | 4.306 | .038 | .331 |
| Radiotherapy | -1.215 | .448 | 7.350 | .007 | .297 |
| Chemotherapy | -1.757 | .587 | 8.972 | .003 | .173 |
| Tumor residue | 2.575 | .590 | 19.022 | .000 | 13.131 |