Demographic information of different groups.

T-T test and one-way analysis of variance (ANOVA) were used for comparison between different groups. There were no statistically significant differences in demographic information among the three groups.
Abbreviation: PD+FOG = PD patients with freezing of gait; PD-FOG = PD patients without freezing of gait; H-Y scale = Hohen Yahr scale; UPDRS = Unified Parkinson's Disease Rating Scale; FOG-Q = Freezing of gait questionnaire.