TABLE 2.
Test-retest statistics for the Lumify probe.
| Parameter | Mean MTP 1 | Mean MTP 2 | ICC | SEM | SEM% | Mean Bias | SMD |
|---|---|---|---|---|---|---|---|
| GM FL | 55.0 ± 11.2 | 55.6 ± 8.8 | 0.79 (0.62,0.89) | 4.6 (3.2,5.7) | 8.5 | −1.6 (−3.9,0.6) | −0.2 (−0.6,0.3) |
| GM PA | 21.7 ± 5.5 | 20.8 ± 4.4 | 0.75 (0.55,0.86) | 2.5 (1.4,3.6) | 9.3 | 0.9 (−0.3,2.1) | 0.2 (-0.3,0.6) |
| GM MT | 18.6 ± 3.5 | 18.6 ± 3.1 | 0.92 (0.85,0.96) | 0.9 (0.7,1.2) | 5.7 | −0.1 (−0.5,0.4) | −0.1 (−0.5,0.5) |
| RF FL | 87.5 ± 13.5 | 85.6 ± 15.1 | 0.44 (0.13,0.67) | 10.8 (7.6,13.3) | 11.8 | 1.9 (−3.4,7.3) | 0.2 (−0.3,0.6) |
| RF PA | 15.2 ± 2.7 | 16.2 ± 3.1 | 0.52 (0.23,0.73) | 1.9 (1.5,2.3) | 11.9 | −1.0 (−2.0,−0.1) | −0.4 (−0.9,0.1) |
| RF MT | 21.2 ± 3.4 | 21.9 ± 3.4 | 0.76 (0.57,0.87) | 1.6 (1.2,2.1) | 7.8 | −0.6 (−1.5,0.2) | −0.2 (−0.7,0.3) |
| VL FL | 81.2 ± 9.9 | 81.1 ± 11.4 | 0.72 (0.51,0.85) | 5.7 (4.2,7.0) | 7.0 | 0.2 (−2.7,3.0) | 0.1 (−0.5,0.5) |
| VL PA | 14.3 ± 2.8 | 14.7 ± 2.4 | 0.57 (0.3,0.76) | 1.7 (1.3,2.0) | 12.7 | −0.4 (−1.2,0.5) | −0.1 (−0.6,0.4) |
| VL MT | 21.2 ± 2.5 | 21.3 ± 2.9 | 0.75 (0.55,0.86) | 1.4 (1.0,1.7) | 6.9 | −0.1 (−0.8,0.6) | −0.1 (−0.5,0.4) |
All values calculated for m. gastrocnemius medialis (GM), m. rectus femoris (RF) and m. vastus lateralis (VL). Parameters of comparison were fascicle length in mm (FL), pennation angle in ° (PA) and muscle thickness in mm (MT). Measurement timepoint (MTP) mean values ± standard deviation. Consecutive pairwise intra-class correlation coefficient (ICC) and standard error of measurement (SEM) and mean bias with 95% compatibility interval. Standard error of measurement is also displayed in percent (SEM%). Standardized mean bias (SMD) with limits of agreement set to ± 1.96 standard deviations.