Table 4.

WML rating scales and volumes (p value Pearson’s Chi squared for rating scales and Mann–Whitney for WML volume).

	CN (n = 34)	CP (n = 18)	All IPD (n = 51)	p value (IPD versus CN)	p value (IPD versus CP)	PIGD (n = 24)	TD (n = 21)	p value (PIGD versus TD)
Wahlund Score: N(%) Mild Moderate Severe	23 (67.6) 9 (26.5) 2 (5.9)	3 (16.7%) 12 (66.7%) 3 (16.7%)	17 (33.3) 23 (45.1) 11 (21.6)	0.005	0.3	6 (25.0%) 13 (54.2%) 5 (20.8%)	8 (38.1%) 8 (38.1%) 5 (23.8%)	0.6
Fazekas PVH: N(%) (0–1) Mild (2) Moderate (3) Severe	25 (73.5) 6 (17.6%) 3 (8.8%)	5 (27.8%) 10 (55.6%) 3 (16.7%)	22 (43.1) 20 (39.2) 9 (17.6)	0.02	0.4	8 (33.3%) 12 (50%) 4 (16.7%)	11 (52.4%) 7 (33.3%) 3 (14.3%)	0.5
Fazekas DWMH: N(%) (0–1) Mild (2) Moderate (3) Severe	28 (82.4%) 4 (11.8%) 2 (5.9%)	11 (61.1%) 5 (27.8%) 2 (11.1%)	27 (52.9) 18 (35.3) 6 (11.8)	0.02	0.9	10 (41.7%) 11 (45.8%) 3 (12.5%)	14 (66.7%) 5 (23.8%) 2 (9.5%)	0.2
WML Volume: (ml) Median (IR)	1.41 (3)	10.44 (15)	4 (9)	0.08	<0.001	8.03 (15)	1 (4)	<0.001

CN: control negative; CP: control positive; DWMH, deep white matter hyperintensity; IPD: idiopathic Parkinson’s disease; PIGD: postural instability and gait disorder; PVH, periventricular hyperintensity; TD: tremor dominant; WML: white matter lesion.