Table 3.
Intra-day and inter-day reliability of the IMU by groups.
| Intra-Day Reliability | ||||
| Spatial Plane |
IMU Second Assessment on the First Day
(Standard Deviation) |
ICC (95%CI) | SEM (º) | MDC90 (º) |
| CP group (n = 23) | ||||
| Flexion-Extension | 138.8 (26.5) | 0.900 (0.762, 0.958) | 8.0 | 18.6 |
| Rotational | 151.3 (20.1) | 0.821 (0.600, 0.920) | 8.3 | 19.4 |
| Side-bending | 91.3 (23.7) | 0.925 (0.822, 0.968) | 6.7 | 15.5 |
| Control group (n = 23) | ||||
| Flexion-Extension | 135.0 (24.7) | 0.893 (0.750, 0.955) | 7.9 | 18.4 |
| Rotational | 147.6 (20.3) | 0.902 (0.750, 0.961) | 5.4 | 12.6 |
| Side-bending | 86.3 (16.1) | 0.913 (0.772, 0.965) | 5.0 | 11.4 |
| Inter-day reliability | ||||
|
IMU assessment on the second day
(standard deviation) |
||||
| CP group (n = 23) | ||||
| Flexion-Extension | 140.8 (26.4) | 0.873 (0.680, 0.947) | 9.0 | 21.1 |
| Rotational | 156.2 (19.5) | 0.533 (0.117, 0.803) | 13.3 | 30.9 |
| Side-bending | 94.4 (24.8) | 0.890 (0.743, 0.953) | 8.3 | 19.3 |
| Control group (n = 23) | ||||
| Flexion-Extension | 140.2 (29.5) | 0.831 (0.602, 0.928) | 11.0 | 25.6 |
| Rotational | 153.2 (19.1) | 0.846 (0.601, 0.935) | 6.5 | 15.1 |
| Side-bending | 93.1 (16.5) | 0.864 (0.653, 0.946) | 6.1 | 14.2 |
Abbreviations: IMU, Inertial Measurement Unit; ICC, Intraclass Correlation Coefficient; CI, confidence interval; SEM, Standard Error of Measurement; MDC, Minimum Detectable Change. Evaluation data are expressed in degrees.