Table 2.
Accuracies for each executed task over all metrics.
| JA | DJ | LDJ | NMAJ | RMSJ | SAL | SpAL | Combined | |
|---|---|---|---|---|---|---|---|---|
| Steps | 85.7 | 59.6 | 60.1 | 57.0 | 80.8 | 88.7 | 62.4 | 89.2 |
| Curve | 80.0 | 91.0 | 92.0 | 67.0 | 79.0 | 77.0 | 94.0 | 92.0 |
| Functional reach | 66.0 | 73.0 | 73.4 | 86.9 | 72.6 | 75.2 | 77.8 | 86.0 |
| Hand task | 69.2 | 82.6 | 82.4 | 75.2 | 74.5 | 83.1 | 84.6 | 87.5 |
| Stand-up | 77.8 | 79.1 | 77.1 | 66.4 | 87.9 | 69.1 | 86.5 | 94.6 |
| Turn | 75.1 | 74.4 | 77.1 | 63.7 | 83.8 | 71.1 | 84.5 | 89.9 |
| Sit down | 87.9 | 81.8 | 83.2 | 82.5 | 79.8 | 67.7 | 84.5 | 88.5 |
The best metrics for each task are highlighted. Accuracies refer to Parkinson’s disease patients with deep brain stimulation switched-off compared to healthy control subjects. The values result from 7 + 1 cross-validation tests.
JA, joint activity (dimensionless); DJ, dimensionless jerk; LDJ, Log dimensionless jerk; NMAJ, normalized mean absolute jerk (1/s2); RMSJ, root mean square jerk (m/s3); SAL, spectral arc length (1/s3), SpAL, speed arc length (dimensionless).