TABLE 3.
Cut-points for MotionWatch8 dependent on wrist-placement.
| Activity Level | Cut-point | Sensitivity | Specificity | Accuracy | Youden Index | Positive Predictive Value | Negative Predictive Value | |
| All Participants (N = 43) | Non-affected Side | |||||||
| Sedentary | ≤165 | 69% | 75% | 74% | 44.33 | 40% | 91% | |
| Light | 165 < x < 685 | – | – | – | – | – | – | |
| MVPA | ≥685 | 38% | 91% | 73% | 27.31 | 69% | 74% | |
| Affected side | ||||||||
| Sedentary | ≤134 | 79% | 71% | 72% | 49.35 | 39% | 93% | |
| Light | 134 < x < 652 | – | – | – | – | – | – | |
| MVPA | ≥652 | 41% | 90% | 73% | 30.76 | 68% | 74% | |
| Adults with Mild Stroke (N = 29) | Non-affected Side | |||||||
| Sedentary | ≤162 | 73% | 76% | 76% | 49.53 | 42% | 92% | |
| Light | 162 < x < 661 | – | – | – | – | – | – | |
| MVPA | ≥ 661 | 34% | 90% | 71% | 24.70 | 66% | 72% | |
| Affected Side | ||||||||
| Sedentary | ≤134 | 75% | 75% | 75% | 50.33 | 41% | 93% | |
| Light | 134 < x < 704 | – | – | – | – | – | – | |
| MVPA | ≥704 | 34% | 90% | 71% | 24.13 | 65% | 72% | |
| Adults Moderate-to-Severe Stroke (N = 14) | Non-affected Side | |||||||
| Sedentary | ≤281 | 78% | 61% | 64% | 39.00 | 33% | 92% | |
| Light | 281 < x < 738 | – | – | – | – | – | – | |
| MVPA | ≥738 | 43% | 90% | 74% | 32.57 | 68% | 76% | |
| Affected Side | ||||||||
| Sedentary | ≤123 | 85% | 63% | 67% | 48.33 | 37% | 95% | |
| Light | 123 < x < 468 | – | – | – | – | – | – | |
| MVPA | ≥468 | 56% | 90% | 79% | 46.13 | 74% | 81% |