Table 2.

Comparison of NODDI and DTI parameters between groups for tumour differentiation and IDH-1 status.

Variables	Tumour differentiation			IDH-1 status
	LGG (n = 18)	HGG (n = 24)	P	Negative (n = 18)	Positive (n = 23)	P
TP
icvf	0.246 ± 0.130	0.401 ± 0.119	<0.001	0.357 ± 0.128	0.322 ± 0.159	0.441
ODI	0.299 ± 0.058	0.360 ± 0.078	0.009	0.340 ± 0.058	0.327 ± 0.089	0.591
FA	0.138 ± 0.041	0.174 ± 0.049	0.015	0.171 ± 0.050	0.152 ± 0.046	0.208
MD (×10−3 mm2/s)	1.609 ± 0.321	1.299 ± 0.272	0.002	1.379 ± 0.345	1.461 ± 0.321	0.436
PT
icvf	0.448 ± 0.130	0.315 ± 0.155	0.006	0.321 ± 0.142	0.410 ± 0.165	0.075
ODI	0.278 ± 0.089	0.245 ± 0.065	0.180	0.243 ± 0.074	0.262 ± 0.067	0.402
FA	0.284 ± 0.088	0.212 ± 0.088	0.012	0.228 ± 0.074	0.259 ± 0.108	0.309
MD (×10−3 mm2/s)	1.085 ± 0.229	1.458 ± 0.373	0.001	1.373 ± 0.327	1.251 ± 0.398	0.301
TP/NAWM
icvf	0.437 ± 0.242	0.770 ± 0.241	<0.001	0.701 ± 0.279	0.576 ± 0.300	0.179
ODI	1.295 ± 0.498	1.679 ± 0.571	0.028	1.658 ± 0.578	1.404 ± 0.561	0.164

TP: tumour parenchyma; PT: peritumoural area; NAWM: normal-appearing white matter; icvf: intracellular volume fraction; ODI: orientation dispersion index; FA: fractional anisotropy; MD: mean diffusion.