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Sensitivity and specificity rate of each activity monitor in measuring moderate-to-vigorous physical activity.
| Monitor | Sensitivity (%) | Specificity (%) |
| PiezoRx (100/120) | 70.9 | 91.7 |
| PiezoRx (110/130) | 90.3 | 79.2 |
| PiezoRx (height adjusted) | 82.1 | 94.3 |
| PiezoRx (height and fitness adjusted) | 81.6 | 91.0 |
| ActiGraph | 83.0 | 89.6 |
