The effect of Tai Chi on HRQOL.

<p>Subgroup analysis was performed according to whether or not medications were included in the intervention. Standardized mean difference was calculated for PDQ-39 (short and long versions) and PDQ-39SI scores. HRQOL, health-related quality of life; PDQ-39, Parkinson's Disease Questionairre-39; PDQ-39SI, PDQ-39 Summary Index.