Multivariate Cox Regression Analysis–Adjusted Risk Estimates for Event-Free Survival (Model II)
| Parameter | B coefficient | Adjusted hazards ratio | 95% CI | P |
| AJCC stage | 0.421 | 1.52 | 0.79–2.82 | 0.27 |
| Smoking pack-years | 0.013 | 1.01 | 1.00–1.03 | 0.07 |
| Age | 0.012 | 1.01 | 0.95–1.07 | 0.77 |
| Sex | 0.297 | 1.35 | 0.42–4.37 | 0.67 |
| Tumor grade | −0.814 | 0.44 | 0.18–1.09 | 0.23 |
| SUVmax | −0.046 | 0.96 | 0.87–1.06 | 0.47 |
| TGA | 0.004 | 1.00 | 1.00–1.01 | 0.02 |
Because of multicollinearity (r = 0.94) between MTV and TGA, MTV was not included in model II.