| OS | PFS | ||||||
---|---|---|---|---|---|---|---|---|
 | HR | 95% CI | P | HR | 95% CI | P | ||
Risk | 32.503 | 2.105 | 501.818 | 0.013 | 0.040 | 0.005 | 0.301 | 0.002 |
AJCC | ||||||||
 I-II |  |  |  | 0.000 |  |  |  | 0.000 |
 III-IV | 16.561 | 4.728 | 58.007 | 0.000 | 6.939 | 2.786 | 17.282 | 0.000 |
 NA | 0.273 | 0.026 | 2.876 | 0.280 | 11.715 | 0.674 | 203.462 | 0.091 |
Radiotherapy | ||||||||
 No |  |  |  | 0.000 |  |  |  | 0.002 |
 Yes | 0.318 | 0.102 | 0.995 | 0.049 | 0.543 | 0.198 | 1.490 | 0.236 |
 NA | 0.023 | 0.005 | 0.113 | 0.000 | 0.164 | 0.053 | 0.504 | 0.002 |