| 变量 | 卡方值 | P值 |
| Age | 0.13 | 0.72 |
| Sex | 0.32 | 0.57 |
| Race | 3.60 | 0.17 |
| Grade | 1.86 | 0.39 |
| AJCC.T | 2.18 | 0.70 |
| AJCC.M | 2.24 | 0.13 |
| AJCC.N | 0.03 | 0.86 |
| Radiation | 1.32 | 0.25 |
| Chemotherapy | 0.66 | 0.42 |
| GLOBAL | 12.98 | 0.53 |