TABLE 2.

Correlation analysis between plasma α-synuclein levels and clinical characteristics in PD group.

Variable	r	P
Age	−0.371	0.007*
Disease duration	−0.110	0.451
MDS-UPDRS III	−0.284	0.046*
Hoehn–Yahr stage	−0.244	0.088
MoCA	−0.165	0.261
MMSE	−0.117	0.430
HAMA	−0.089	0.544
HAMD	−0.112	0.445

r = correlation coefficient;

*P < 0.05.