Table 3:

Exploratory analysis of spatial habitats for predicting TTP in patients with PCNSL

Spatial Tumor Habitats	TTP
Spatial Tumor Habitats	Hazard Ratio^{^a}	95% CI	P Value
No. of voxels (20,000 voxels)
Hypervascular cellular habitat	1.39	0.29–6.44	.29
Hypovascular cellular habitat	2.83	1.20–6.65	.017
Hypovascular hypocelluar habitat	2.03	0.58–7.15	.27
Voxel fraction (%)
Hypervascular cellular habitat	0.88	0.04–20.97	.83
Hypovascular cellular habitat	2.07	0.29–14.83	.46
Hypovascular hypocelluar habitat	0.46	0.05–4.01	.48
ADC	0.98	0.95–1.01	.16
CBV	0.80	0.45–1.32	.38

↵a Hazard ratios reported here indicate the relative change in hazard that a 10-unit (20,000 voxels) increase in each imaging parameter incurs.