Table 3 Intra- and inter-trail reliability for the inertial measurement unit and the force plate
From: Coherence and reliability of a wearable inertial measurement unit for measuring postural sway
Trial 1 | Trial 2 | Trial 3 | P-value | Intra-trial reliability | CV (95% CI) | |
|---|---|---|---|---|---|---|
Mean (SD) | Mean (SD) | Mean (SD) | ICC (95%) | |||
Force plate M-L | ||||||
Eyes open (mm/s) | 3.88 (1.63) | 4.08 (1.45) | 4.15 (1.79) | 0.80 | 0.74 (0.58–0.85) | 14.7 (11.8–17.6) |
Eyes closed (mm/s) | 5.85 (2.57) | 5.46 (2.97) | 5.07 (2.56) | 0.48 | 0.74 (0.58–0.85) | 18.4 (15.1–21.7) |
Force plate A–P | ||||||
Eyes open (mm/s) | 6.18 (2.14) | 6.28 (2.5) | 6.19 (2.54) | 0.98 | 0.82 (0.70–0.90) | 11.9 (9.6–14.1) |
Eyes closed (mm/s) | 11.56 (4.86) | 10.29 (4.32) | 10.01 (4.09) | 0.33 | 0.84 (0.73–0.91) | 15.4 (12.3–18.6) |
IMU M-L | ||||||
Eyes open (mm/s) | 4.96 (2.14) | 5.61 (1.99) | 5.41 (2.20) | 0.45 | 0.54 (0.34–0.72) | 18.9 (14.3–23.4) |
Eyes closed (mm/s) | 6.85 (3.68) | 6.58 (4.15) | 5.74 (2.15) | 0.41 | 0.67 (0.50–0.81) | 22.1 (17.9–26.6) |
IMU A–P | ||||||
Eyes open (mm/s) | 8.71 (2.51) | 9.51 (3.95) | 8.65 (2.42) | 0.45 | 0.50 (0.29–0.69) | 17.8 (14.3–21.2) |
Eyes closed (mm/s) | 14.87 (4.99) | 13.33 (4.82) | 13.27 (4.40) | 0.31 | 0.61 (0.42–0.77) | 20.6 (16.9–24.3) |