Table 3

 Pooled weighted effect size and mean difference

Random effects model95% CIFixed effects model95% CIQ statistic, p value
*Effect size: standardised mean difference. The mean difference was calculated using the change from pre- to post-treatment UPDRS for the active group. 95% CI, 95% confidence interval.
Pooled weighted mean difference (all studies)5.903.36, 8.444.152.79, 5.500.001
Pooled weighted effect size* (all studies)0.620.38, 0.850.590.40, 0.780.11
Pooled weighted effect size* (controlled studies)0.600.24, 0.960.560.30, 0.810.052