Table 9.

Comparison of ROI positions in DKI3b between PD group and HC group

ROI position	Parameter		PD group ()	HC group ()	t/Z	p
Substantia nigra	MK	0.94 ± 0.27		0.75 ± 0.23	2.424	0.020
	AK	0.56 ± 0.16		0.56 ± 0.21	-0.460z	0.646
	RK	0.97 ± 0.39		0.84 ± 0.24	1.299	0.202
	MD	0.45 ± 0.07		0.37 ± 0.05	4.055	< 0.001
	FA	0.22 ± 0.06		0.2 ± 0.05	-0.189	0.850
Red nucleus	MK	0.71 ± 0.23		0.72 ± 0.31	-0.207	0.837
	AK	0.55 ± 0.20		0.63 ± 0.22	-1.407z	0.160
	RK	0.90 ± 0.32		0.79 ± 0.27	1.162	0.252
	MD	0.45 ± 0.07		0.40 ± 0.07	-1.758	0.079
	FA	0.19 ± 0.06		0.19 ± 0.04	-0.216	0.829
Head of caudate nucleus	MK	0.44 ± 0.27		0.59 ± 0.30	-1.704z	0.088
	AK	0.54 ± 0.32		0.58 ± 0.25	-1.082z	0.279
	RK	0.55 ± 0.32		0.76 ± 0.35	-1.839z	0.066
	MD	0.48 ± 0.10		0.42 ± 0.08	2.097	0.043
	FA	0.09 ± 0.03		0.09 ± 0.02	-1.109z	0.267
Putamen	MK	0.53 ± 0.17		0.59 ± 0.21	-1.066	0.293
	AK	0.59 ± 0.32		0.61 ± 0.16	-1.028z	0.304
	RK	0.62 ± 0.18		0.65 ± 0.22	-0.491	0.626
	MD	0.45 ± 0.10		0.41 ± 0.11	-1.488z	0.137
	FA	0.10 ± 0.04		0.09 ± 0.03	-0.893z	0.372
Thalamus	MK	0.54 ± 0.24		0.66 ± 0.20	-2.083	0.037
	AK	0.55 ± 0.25		0.56 ± 0.20	-0.239	0.812
	RK	0.78 ± 0.28		0.67 ± 0.12	1.483	0.146
	MD	0.45 ± 0.10		0.42 ± 0.07	-0.839z	0.402
	FA	0.15 ± 0.07		0.14 ± 0.03	-0.054z	0.957

Note: z-rank sum test