Table 2:

DWI, PWI, and MRS measurements in grade II and grade III oligodendroglial tumors and genotypes according to grade

Parameter	Grade			Grade and Deletions
Parameter	II (n = 24)	III (n = 26)	P value	Grade II with 1p/19q Loss (n = 13)	Grade II with Intact 1p/19q (n = 11)	Grade III with 1p/19q Loss (n = 6)	Grade III with Intact 1p/19q (n = 20)
ADC (10^–3 mm²/s)	1238.50 ± 208.42	995.19 ± 266.97	.0008	1181.9 ± 201.32	1305.4 ± 205.38	1059.16 ± 127.21^{^b}	976 ± 296.38^{^a,^b}
rADC	1.66 ± 0.29	1.3 ± 0.29	< .0001	1.57 ± 0.22	1.77 ± 0.33	1.49 ± 0.15	1.24 ± 0.3^{^a,^b}
rCBV	1.57 ± 0.82	3.89 ± 1.97	< .0001	2.09 ± 0.73	0.95 ± 0.33^{^a}	4.43 ± 2.38^{^a,^b}	3.72 ± 1.86^{^a,^b}
rCBF	1.65 ± 0.97	4.12 ± 2.15	< .0001	2.21 ± 0.92	0.98 ± 0.48^{^a}	4.87 ± 3.36^{^a,^b}	3.89 ± 1.69^{^a,^b}
rK2	5.18 ± 7.26	13.64 ± 9.86	< .0001	6.5 ± 8.14	3.57 ± 6.05	12.65 ± 12.59^{^b}	13.93 ± 9.27^{^a,^b}
NAA/H₂O^{^c}	3.19 ± 1.52	2.39 ± 0.71	.023	3.20 ± 1.13	3.18 ± 1.96	2.53 ± 0.62	2.34 ± 0.75^{^a}
Cr/H₂O^{^c}	3.24 ± 1.37	2.84 ± 1.13	.472	3.03 ± 0.94	3.5 ± 1.77	2.8 ± 0.86	2.86 ± 1.22
Cho/H₂O^{^c}	3.87 ± 1.18	4.81 ± 2.65	.26	3.74 ± 0.82	4.03 ± 1.53	4.75 ± 1.28	4.83 ± 2.97
mIns/H₂O^{^c}	2.27 ± 2.16	1.77 ± 1.19	.669	2.09 ± 1.6	2.49 ± 2.76	1.5 ± 0.53	1.84 ± 1.33
Glx/H₂O^{^c}	8.54 ± 2.96	7.94 ± 2.82	.69	8.92 ± 2.74	2.08 ± 3.27	7.83 ± 1.63	7.97 ± 3.12
Lipids/H₂O^{^c}	14.25 ± 16.07	15.88 ± 28.40	.969	19.13 ± 20.76	8.48 ± 3.02	11.76 ± 5.89	17.11 ± 32.32
NAA/Cr^{^c}	1.02 ± 0.38	0.99 ± 0.61	.145	1.11 ± 0.40	0.91 ± 0.34	0.98 ± 0.35	0.99 ± 0.67^{^a}
Cho/Cr^{^c}	1.33 ± 0.55	1.80 ± 1.00	.034	1.42 ± 0.69	1.22 ± 0.33	2.14 ± 1.81	1.7 ± 0.64^{^b}
NAA/Cho^{^c}	0.86 ± 0.41	0.64 ± 0.40	.02	0.91 ± 0.48	0.8 ± 0.34	0.59 ± 0.27^{^a}	0.66 ± 0.43
mIns/Cr^{^c}	0.67 ± 0.41	0.58 ± 0.31	.846	0.72 ± 0.5	0.61 ± 0.28	0.56 ± 0.14	0.59 ± 0.35

Note:—mIns indicates myo-inositol; rADC, relative apparent diffusion coefficient; rCBV, relative cerebral blood volume; rCBF, relative cerebral blood flow; rK2, relative permeability index.
↵a Significantly different from grade II with 1p/19q loss (P < .05).
↵b Significantly different from grade II with intact 1p/19q (P < .05).
↵c Short TE.