Table 4.

Demographic and clinical characteristics of patients enrolled in this study. Data are shown as mean ± standard deviation or n (%).

	PD ($n=105$)	PSP ($n=69$)	MSA-P ($n=63$)	MSA-C ($n=69$)	Normal ($n=105$)
Age (years)	$69.83\pm 10.14$	$73.86\pm 7.85$	$71.58\pm 9.30$	$64.6\pm 9.04$	$68.29\pm 9.69$
Sex (male)	$56(53.33)$	$45(65.22)$	$46(66.67)$	$31(49.21)$	$52(49.52)$
Onset to MRI (years)	$6.02\pm 6.09$	$4.68\pm 3.34$	$4.27\pm 2.82$	$3.01\pm 2.63$	–

PD Parkinson’s disease, PSP progressive supranuclear palsy, MSA-P multiple systemic atrophy-Parkinsonian type, MSA-C multiple systemic atrophy-cerebellar type.