| Treatment status | n | Survival rate (%) | χ2 | P | |||
| 1-year | 3-years | 5-years | |||||
| Chemotherapy | Yes | 72 | 77.97 | 42.37 | 20.34 | 0.01 | 0.9431 |
|
| No | 206 | 78.92 | 38.24 | 20.59 |
|
|
| ENI | Yes | 73 | 81.13 | 52.83 | 28.03 | 4.24 | 0.0394 |
|
| No | 205 | 78.10 | 35.71 | 18.57 |
|
|
| Dose | ≤60 Gy | 105 | 77.36 | 33.02 | 16.98 | 2.03 | 0.1542 |
|
| >60 Gy | 173 | 79.62 | 43.31 | 22.73 |
|
|
| RT-technic | IMRT | 76 | 81.82 | 51.52 | 24.24 | 3.17 | 0.0748 |
|
| 3D-CRT | 202 | 77.66 | 35.02 | 19.29 |
|
|