TABLE 4

Multivariate Analysis (Cox Proportional Hazards Model) of Imaging-Related Factors vs. RPA Score, Prescribed Radiation Dose, MGMT Status, Postoperative T_{vol 1.6} (FET-1), and Extent of Resection

	Analysis of PFS			Analysis of OS
Variable	P	Hazard ratio	95% confidence interval	P	Hazard ratio	95% confidence interval
TBR_max (FET-2 vs. FET-1)	0.017^*	0.122	0.021–0.691	0.028^*	0.197	0.046–0.841
TBR_mean (FET-2 vs. FET-1)	0.035^*	0.216	0.052–0.899	0.05^*	0.195	0.037–1.029
T_{vol 1.6} (FET-3 vs. FET-1)	0.007^*	0.142	0.034–0.588	0.07	0.326	0.097–1.094
Gd-volume (MRI-3 vs. MRI-1)	0.311	0.558	0.181–1.724	0.197	0.447	0.131–1.518

↵* Significant.