Table 2.

Global and partial volume ratios of PD-non pRBD, PD-pRBD, and HC.

	PD-non pRBD	PD-pRBD	HC	Test stats	P-value
Global atrophy volumes
Cortical GM	28.6704 (2.16624)	28.7482 (2.51696)	29.6923 (2.09360)	5.020	0.007^1,2
Subcortical GM	3.5597 (0.25621)	3.4926 (0.29242)	3.6037 (0.28252)	3.140	0.045¹
Ventricular system	1.9743 (0.99272)	2.2429 (1.04248)	1.7940 (0.82571)	4.082	0.018¹
Deep GM nuclei
Left thalamus	0.4559 (0.04486)	0.4407 (0.04097)	0.4556 (0.04221)	3.464	0.033³
Right thalamus	0.4460 (0.04276)	0.4348 (0.04267)	0.4451 (0.04165)	1.841	0.161
Left caudate	0.2124 (0.02607)	0.2108 (0.02504)	0.2155 (0.02593)	0.636	0.530
Right caudate	0.2190 (0.02797)	0.2167 (0.02808)	0.2201 (0.02643)	0.311	0.733
Left putamen	0.2902 (0.03366)	0.2811 (0.03785)	0.2955 (0.03683)	3.124	0.046¹
Right putamen	0.2883 (0.03211)	0.2816 (0.03791)	0.2955 (0.03659)	2.934	0.055¹
Left pallidum	0.1280 (0.01427)	0.1259 (0.01687)	0.1267 (0.01498)	0.509	0.602
Right pallidum	0.1256 (0.01355)	0.1212 (0.01663)	0.1236 (0.01422)	2.159	0.117
Left hippocampus	0.2548 (0.02980)	0.2494 (0.02969)	0.2623 (0.02942)	3.507	0.031¹
Right hippocampus	0.2619 (0.03127)	0.2606 (0.03106)	0.2699 (0.02957)	2.028	0.134
Left amygdala	0.1000 (0.01482)	0.0984 (0.01815)	0.1052 (0.01435)	3.710	0.026¹
Right amygdala	0.1089 (0.01427)	0.1088 (0.01671)	0.1146 (0.01425)	3.813	0.023²
Left accumbens	0.0294 (0.00680)	0.0300 (0.00732)	0.0299 (0.00597)	0.233	0.792
Right accumbens	0.0317 (0.00662)	0.0317 (0.00700)	0.0322 (0.00583)	0.156	0.856
Brainstem	1.3904 (0.12004)	1.3618 (0.12659)	1.3870 (0.12034)	1.435	0.240

GM gray matter, PD-non pRBD PD without probable RBD, PD-pRBD PD with probable RBD, HC healthy controls.

Data are presented by groups as mean (SD). Analysis of variance (ANOVA) followed by post hoc test corrected by Bonferroni was used.

¹Significant differences (p < 0.05) were found between PD-pRBD and HC.

²Significant differences (p < 0.05) were found between PD-non pRBD and HC.

³Significant differences (p < 0.05) were found between PD-non pRBD and PD-pRBD.