Table 3.
Correlation between robotic indices and clinical parameters
| SARA (total score) | SARA (upper limb) | GAA smaller | GAA longer | Disease duration | ||
|---|---|---|---|---|---|---|
| Kinematic indices | Duration of Movement | 0.617* | 0.659* | 0.235 | −0.361 | −0.109 |
| Mean Velocity | −0.542 | −0.634 | −0.417 | 0.193 | 0.078 | |
| Peak Velocity | −0.480 | −0.541 | −0.200 | 0.207 | 0.093 | |
| Accuracy indices | Length Ratio | 0.355 | 0.363 | −0.214 | −0.336 | −0.208 |
| Lateral | 0.134 | 0.136 | 0.077 | −0.102 | −0.399 | |
| Aiming Angle | 0.029 | 0.160 | 0.238 | 0.224 | −0.639 | |
| Smoothness indices | Normalized Jerk | 0.674* | 0.739* | 0.291 | −0.329 | −0.118 |
| Speed Metric | −0.403 | −0.385 | −0.060 | 0.413 | −0.100 | |
| Submovement indices | Number of Submovements | 0.606* | 0.708* | 0.200 | −0.266 | −0.191 |
| Duration of Submovements | 0.062 | −0.009 | 0.109 | −0.025 | −0.051 | |
| Amplitude of Submovements | −0.491 | −0.605 | −0.305 | 0.144 | 0.062 | |
Spearman’s rank correlation coefficient are reported. The symbol * indicates a statistical significance, with p < 0.05 (p values are corrected for multiple comparison, by using a False Discovery Rate procedure).