Demographic data of study patients
| Tai Chi group (n=143) | Control group (n=187) | P value | |
| Gender, female, N (%) | 65 (45.45) | 88 (47.06) | 0.859 |
| Age at baseline, mean (SD) | 66.70 (9.02) | 66.40 (8.13) | 0.756 |
| Education, years, mean (SD) | 9.88 (2.45) | 10.26 (2.99) | 0.211 |
| History of hypertension, N (%) | 12 (8.39) | 17 (9.09) | 0.979 |
| History of diabetes mellitus, N (%) | 13 (9.09) | 14 (7.49) | 0.746 |
| History of smoking, N (%) | 18 (12.59) | 26 (13.90) | 0.853 |
| Family history, N (%) | 11 (7.69) | 13 (6.95) | 0.966 |
| Tremor dominant, N (%) | 89 (62.24) | 118 (63.10) | 0.963 |
| Disease duration, mean (SD) | 4.35 (2.01) | 3.98 (1.85) | 0.086 |
| Amount of exercise at baseline, min/week, mean (SD) | 25.47 (14.03) | 23.12 (15.16) | 0.147 |
| MMSE at baseline, mean (SD) | 27.80 (1.49) | 27.96 (1.43) | 0.315 |
| UPDRS at baseline, mean (SD) | 16.73 (3.37) | 17.16 (3.75) | 0.272 |
| LEDD at baseline, mean (SD) | 224.21 (91.51) | 229.54 (85.38) | 0.590 |
| HAMD at baseline, mean (SD) | 4.71 (1.65) | 4.64 (1.72) | 0.829 |
| HAMA at baseline, mean (SD) | 3.22 (1.02) | 3.35 (1.37) | 0.733 |
HAMA, Hamilton Anxiety Rating Scale; HAMD, Hamilton Depression Rating Scale; LEDD, levodopa equivalent daily dosage; MMSE, Mini-Mental State Examination; SD, standard deviation; UPDRS, Unified Parkinson’s Disease Rating Scale.