Table 3. DTI measurements for the five callosal subregions.

Region	DTI metrics	Patients	Controls	p value
I	FA	0.61 ± 0.04	0.62 ± 0.02	0.621
	AD	1.67 ± 0.11	1.66 ± 0.06	0.835
	RD	0.59 ± 0.08	0.57 ± 0.03	0.809
	MD	0.95 ± 0.08	0.93 ± 0.04	0.857
II	FA	0.48 ± 0.03	0.50 ± 0.02	0.07
	AD	1.74 ± 0.14	1.66 ± 0.06	0.037*
	RD	0.87 ± 0.11	0.81 ± 0.05	0.035*
	MD	1.16 ± 0.12	1.09 ± 0.05	0.020*
III	FA	0.48 ± 0.04	0.48 ± 0.03	0.932
	AD	1.82 ± 0.18	1.73 ± 0.09	0.113
	RD	0.88 ± 0.15	0.82 ± 0.07	0.354
	MD	1.19 ± 0.15	1.13 ± 0.07	0.202
IV	FA	0.45 ± 0.05	0.47 ± 0.05	0.731
	AD	1.90 ± 0.16	1.84 ± 0.12	0.584
	RD	0.95 ± 0.15	0.89 ± 0.12	0.568
	MD	1.27 ± 0.15	1.21 ± 0.11	0.576
V	FA	0.66 ± 0.02	0.68 ± 0.02	0.238
	AD	1.88 ± 0.09	1.87 ± 0.11	0.925
	RD	0.61 ± 0.06	0.58 ± 0.04	0.246
	MD	1.04 ± 0.06	1.01 ± 0.05	0.603

Single star (*) represents the difference is significant at p < 0.05 (Holm-Sidak correction for multiple comparisons). Axial diffusivity (AD), radial diffusivity (RD) and mean diffusivity (MD) values are ×10⁻³ mm²/s. FA, fractional anisotropy.