Table 2:

Threshold values for multiple parameters for differentiating glioblastomas and other-grade gliomas

Parameters	Based on Minimum C1 Error					Errors		Based on Minimum C2 Error					Errors
	Threshold	Sensitivity	Specificity	PPV	NPV	C1	C2	Threshold	Sensitivity	Specificity	PPV	NPV	C1	C2
rCBF ratio mean	2.562	0.867	0.765	0.765	0.867	0.184	0.073	2.562	0.867	0.765	0.765	0.867	0.184	0.073
rCBF ratio max	2.845	0.867	0.824	0.813	0.875	0.155	0.049	2.845	0.867	0.824	0.813	0.875	0.155	0.049
rCBF ratio min	2.017	0.867	0.588	0.650	0.834	0.273	0.187	2.164	0.800	0.647	0.667	0.786	0.277	0.165
rCBF ratio meana	1.857	0.929	0.833	0.928	0.834	0.119	0.033	1.857	0.929	0.833	0.928	0.834	0.119	0.033
rCBF ratio maxa	2.258	0.929	0.833	0.928	0.834	0.119	0.033	2.258	0.929	0.833	0.928	0.834	0.119	0.033
rCBF ratio mina	2.164	0.786	0.833	0.917	0.625	0.191	0.074	2.164	0.786	0.833	0.917	0.625	0.191	0.074
FA ratio mean	0.380	0.733	0.765	0.733	0.765	0.251	0.127	0.380	0.733	0.765	0.733	0.765	0.251	0.127
FA ratio max	0.371	0.800	0.588	0.631	0.769	0.306	0.210	0.418	0.667	0.706	0.667	0.706	0.314	0.197
FA ratio min	0.333	0.600	0.647	0.600	0.647	0.377	0.285	0.333	0.600	0.647	0.600	0.647	0.377	0.285
ADC ratio mean	1.305	0.800	0.765	0.750	0.813	0.218	0.095	1.305	0.800	0.765	0.750	0.813	0.218	0.095
ADC ratio max	1.494	0.933	0.529	0.636	0.899	0.269	0.226	1.494	0.933	0.529	0.636	0.899	0.269	0.226
ADC ratio min	1.449	0.933	0.647	0.700	0.916	0.210	0.129	1.148	0.733	0.824	0.786	0.778	0.222	0.102
Cho/Cr	1.789	0.933	0.471	0.609	0.888	0.298	0.284	2.813	0.733	0.647	0.647	0.733	0.310	0.196
NAA/Cho	0.338	0.733	0.647	0.647	0.733	0.310	0.196	0.338	0.733	0.647	0.647	0.733	0.310	0.196
NAA/Cr	1.922	0.200	1.000	1.000	0.586	0.400	0.640	0.725	0.600	0.412	0.474	0.539	0.494	0.506
Lac/Cr	2.778	0.667	0.882	0.833	0.750	0.226	0.125	2.778	0.667	0.882	0.833	0.750	0.226	0.125

^arCBF ratio derived from purely astrocytomas.