. Author manuscript; available in PMC: 2022 Apr 15.

Published in final edited form as: J Neurol Sci. 2021 Feb 21;423:117365. doi: 10.1016/j.jns.2021.117365

Table 2.

Subcortical volumetric results

			S-W p values		M-W/t-test
Volume (mm³)	Control (N = 37)	PD (N = 48)	Control	PD	p values
Total intracranial	1,519,807 ± 170,334	1,592,940 ± 153,488	0.163	0.985	0.041
Thalamus	6,851 ± 775	7,334 ± 837	0.109	0.237	0.331
Caudate	3,425 ± 396	3,438 ± 411	0.053	0.019	0.050
Putamen	4,598 ± 631	4,515 ± 617	0.258	0.559	0.016
Pallidum	1,964 ± 205	2,290 ± 328	0.010	0.000	0.000^*
Hippocampus	4,004 ± 350	3,999 ± 380	0.004	0.488	0.136
Amygdala	1,669 ± 202	1,584 ± 223	0.038	0.648	0.001^*
Accumbens	469 ± 87	390 ± 75	0.069	0.564	0.000^*

M-W/t-test: Mann-Whitney U nonparametric test for volumes that were not normally distributed in either group and two-sample test for volumes that were normally distributed in both groups, S-W: Shapiro-Wilk test for normality of distribution. All statistical tests were performed on volumes that were averaged across both hemispheres and normalized to the total intracranial volume.

^*:

Significant p values that are below the statistical threshold of p < 0.007 (0.05/7).