Table 4 Correlation of effect size, suppression ratio, disease severity and disease duration. n indicates the number of studies for correlation analysis and dashed line indicated that no data was available for calculating the correlation
Strategy | Disease severity (UPDRS) | Disease duration (Year) | |
|---|---|---|---|
Light therapy | Effect size (SMD) | 0.12 (p = 0.88), n = 4 | |
Tremor suppression (%) | -0.36 (p = 0.76), n = 3 | ||
Tremor suppression (%) | -0.27 (p = 0.66), n = 5 | 0.02 (p = 0.96), n = 7 | |
Magnetic stimulation | Effect size (SMD) | -0.98 (p = 0.003), n = 5 | -0.33 (p = 0.53), n = 6 |
Tremor suppression (%) | 0.37 (p = 0.63), n = 4 | ||
Electrical stimulation | Effect size (SMD) | -0.92(p = 0.26), n = 3 | -0.09 (p = 0.91), n = 4 |
Tremor suppression (%) | 0.40 (p = 0.43), n = 6 | 0.20 (p = 0.80), n = 4 |