Table 1. General characteristics of the subjects.
PD, Parkinson's disease; NS, non-significant differences.
1) Mean ± SD.
2) Student's t-test between control and total PD patient groups.
3) ANOVA followed by Tukey's post hoc test between control, early PD patient and advanced PD patient groups.
4) Number of the subjects.
5) Chi-square tests for control and total PD patient groups.
6) Chi-square tests for control, early PD patient and advanced PD patient groups.
7) Student's t-test between early and advanced PD patient groups.
8) Hoehn and Yahr stage; median (25-75th percentile).
9) Mann-Whitney U test between early and advanced PD patient groups.
10) Motor subset score of Unified Parkinson's Disease Rating Scale; mean ± SD.