Table 4.

Comparison of AD values (×10⁻⁴mm²s^− 1) of normal white matter or WMH with same Fazekas scale in different regions

	pFL Mean ± SD	pOL Mean ± SD	pPL Mean ± SD	dCO Mean ± SD	p-value	Effect Size (η2)
Normal white matter	9.11 ± 0.82	11.70 ± 1.15**	8.63 ± 0.84	9.41 ± 0.64	< 0.001	0.518
WMH of Fazekas scale 1	12.16 ± 0.62	12.37 ± 1.12	10.44 ± 1.19**	10.62 ± 1.23**	< 0.001	0.438
WMH of Fazekas scale 2	13.48 ± 0.71	12.96 ± 1.03	10.92 ± 1.41**	11.18 ± 1.14**	< 0.001	0.506
WMH of Fazekas scale 3	14.10 ± 0.78	14.76 ± 0.91	12.96 ± 1.32*	11.57 ± 0.75**	< 0.001	0.556

pFL periventricular frontal lobe, pOL periventricular occipital lobe, pPL periventricular parietal lobe, dCO deep centrum ovale. There was significant difference compared with pFL, *p < 0.05, **p < 0.001