Table 1 Intratester Reliability of the measurement of Thickness of the Transverse Abdominis muscle at three Lumbar levels at rest and during the hollowing maneuver
Resting | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Right Mean (SD) cm | Left Mean (SD) cm | ICC (95% CI) | SEM (cm) (95% CI for muscle size) | % SEM | Minimal Difference (cm) | |||||
Level | Right | Left | Right | Left | Right | Left | Right | Left | ||
L1 | 0.394 (0.096) | 0.404 (0.099) | 0.985 (0.967–0.994) | 0.976 (0.947–0.991) | 0.012 (0.37–0.42) | 0.015 (0.374–0.434) | 3.046 | 3.713 | 0.033 | 0.043 |
L3 | 0.370 (0.078) | 0.393 (0.108) | 0.971 (0.936–.989) | 0.969 (0.933–0.988) | 0.016 (0.339–0.403) | 0.019 (0.355–0.430) | 3.846 | 4.835 | 0.044 | 0.053 |
L5 | 0.355 (0.071) | 0.340 (0.091) | 0.926 (0.838–0.972) | 0.976 (0.947–0.991) | 0.019 (0.32–0.39) | 0.014 (0.311–0.367) | 5.352 | 4.118 | 0.053 | 0.039 |
Average value (SD) | 0.376 (0.09) | 0.97 (0.02) | 0.02 (0.003) | 4.15 (0.83) | 0.04 (0.008) | |||||
Hollowing | ||||||||||
Right Mean (SD) cm | Left Mean (SD) cm | ICC (95% CI) | SEM (95% CI for muscle size) | %SEM | Minimal Difference (cm) | |||||
Level | Right | Left | Right | Left | Right | Left | Right | Left | ||
L1 | 0.541 (0.153) | 0.567 (0.148) | 0.972 (0.938–0.989) | 0.973 (0.942–0.990) | 0.025 (0.49–0.59) | 0.024 (0.519–0.615) | 4.621 | 4.233 | 0.071 | 0.067 |
L3 | 0.523 (0.162) | 0.561 (0.157) | 0.976 (0.947–0.991) | 0.977 (0.951–0.992) | 0.025 (0.48–0.58) | 0.024 (0.515–0.610) | 4.780 | 4.278 | 0.069 | 0.066 |
L5 | 0.494 (0.186) | 0.545 (0.246) | 0.977 (0.949–0.991) | 0.992 (0.983–0.997) | 0.028 (0.44–0.55) | 0.022 (0.502–0.588) | 5.668 | 4.037 | 0.078 | 0.061 |
Average value (SD) | 0.539 (0.18) | 0.98 (0.01) | 0.02 (0.002) | 4.60 (0.59) | 0.07 (0.006) | |||||