TABLE 5
Multivariate Cox Regression with Respect to DM
| Parameter | HR | Confidence | P |
| Clinical parameters | |||
| Smoker | 1.7 | 0.95–3.1 | 0.071 |
| PET parameters | |||
| MTV | 2.5 | 1–6 | 0.039 |
| SUVmax | 2.2 | 0.99–4.7 | 0.052 |
| SURmax | 3.1 | 1.4–6.7 | 0.005 |
 | 3.9 | 1.3–11 | 0.014 |
| SUVmean | 2.5 | 0.94–6.7 | 0.065 |
| SURmean | 3.3 | 1.4–7.9 | 0.007 |
 | 4.4 | 1.5–13 | 0.007 |
Each PET parameter was analyzed separately together with clinical parameters, which were significant prognostic factors (or exhibited a trend for significance) in univariate Cox regression. HRs and P values of clinical parameters were averaged over all analyses.