Table 2. Univariate and multivariate analysis of clinical factor and risk score.
| Variables | Univariate analysis | Multivariate analysis | |||||||
| HR | 95% CI | P value | HR | 95% CI | P value | ||||
| Age | 1.023 | 1.007 | 1.040 | 0.004 | 1.034 | 1.015 | 1.053 | 2.865E-04 | |
| Gender | 0.853 | 0.571 | 1.275 | 0.438 | NA | NA | NA | NA | |
| Race | 1.257 | 0.591 | 2.671 | 0.553 | NA | NA | NA | NA | |
| Sample weight | 1.000 | 0.999 | 1.000 | 0.295 | NA | NA | NA | NA | |
| Total necrosis percent | 1.208 | 0.953 | 1.532 | 0.119 | NA | NA | NA | NA | |
| Margin status | 1.899 | 1.175 | 3.070 | 0.009 | 2.155 | 1.262 | 3.679 | 0.005 | |
| Metastatic diagnosis | 2.939 | 1.788 | 4.831 | 2.123E-05 | 3.937 | 2.252 | 6.884 | 1.533E-06 | |
| Radiation therapy | 0.604 | 0.280 | 1.301 | 0.198 | NA | NA | NA | NA | |
| Histological type | 0.972 | 0.865 | 1.093 | 0.636 | NA | NA | NA | NA | |
| Risk score | 1.908 | 1.506 | 2.417 | 8.518E-08 | 2.355 | 1.710 | 3.243 | 1.554E-07 | |
Note: HR: hazard ratio; CI: confidence interval; NA: not available.