TABLE 3:

Differentiation of tumors as low versus high grade

Parameter	High Grade (n = 16)		Low Grade (n = 20)		Benign (n = 13)		Control (n = 15)		F Score^*	P Value^*
Parameter	Mean	SD	Mean	SD	Mean	SD	Mean	SD	F Score^*	P Value^*
NAA/Cho	0.65	0.30	0.66	0.27	1.12	0.59	1.35	0.14	16.520	.000^†
NAA/Cr	1.03	0.35	1.05	0.41	1.42	0.51	1.68	0.28	10.051	.000^†
NAA/Cho + Cr	0.39	0.16	0.39	0.14	0.61	0.25	0.75	0.01	18.406	.000^†
Cho/Cr	1.79	0.69	1.71	0.56	1.45	0.65	1.24	0.16	3.159	.031^‡
Lipid/Cr	0.49	0.34	0.25	0.17	0.29	0.19	0.16	0.01	6.814	.000^§
Lactate/Cr	0.36	0.21	0.22	0.22	0.01	0.14	0.00	0.00	13.589	.000^\|
Lactate/lipid	0.93	0.84	0.78	0.74	0.18	0.43	0.00	0.00	8.292	.000^¶
Alanin/Cr	0.00	0.00	0.00	0.00	0.21	0.28	0.00	0.00	12.099	.000^#
ADC_T	87.16	10.41	115.33	11.67	107.69	8.05	79.37	4.10	54.741	.000^**
ADC_PT	148.56	30.86	167.18	32.82	94.23	29.23	79.37	4.10	38.774	.000^††

Note.—ADC_T indicates calculated ADC values from tumoral area; ADC_PT, calculated ADC values from peritumoral area; NS, no significance.
* F score and P values were obtained by using Tukey pairwise post hoc test.
† control > high-grade, control > low-grade P < .001; benign > low-grade, benign > high-grade P < .05; otherwise NS.
‡ high-grade > control P < .05; otherwise NS.
§ high-grade < control P < .001; high-grade > low-grade P < .05; otherwise NS.
| high-grade > benign, high-grade > control P < .001; low-grade > benign, low-grade > control P < .05; otherwise NS.
¶ high-grade > control P = .001; high-grade > benign, low-grade > benign, low-grade > control P < .05; otherwise NS.
# benign > high-grade, benign > low-grade, benign > control P < .001; otherwise NS.
** low-grade > high-grade, benign > high-grade, benign > control, low-grade > control P < .001; otherwise NS.
†† high-grade > benign, high-grade > control, low-grade > benign, low-grade > control P < .001; otherwise NS.