Table 3.

Measures of the optimal cut-off values with their corresponding sensitivities and specificities of the metabolic ratios which provide a statistical differentiation between high and low grade gliomas.

Metabolites ratios	Cut-off values	Sensitivity (%)	Specificity (%)	AUC
Intratumoral area
Short TE Cho/Cr	1.90	78	82	0.825
Long TE Cho/Cr	2.70	68	75	0.737
Long TE Cho/NAA	1.60	75	58	0.688
Peritumoral area
Short TE NAA/Cr	1.40	100	50	0.763
Long TE NAA/Cr	1.65	82	61	0.710
Long TE Cho/Cr	1.20	64	80	0.701
Long TE Cho/NAA	1.70	62	80	0.745