Table 4.
Mean, inter-operator and intra-operator reliability of shear modulus measurements in critical ill patients (n = 12)
| Measurements | Critically ill patients (n = 12) | ||||||
|---|---|---|---|---|---|---|---|
| Measures (n) | Operator 1Mean (SD) | Operator 2 Mean (SD) | t-test (p value) | Inter-operator reproducibility (ICC) | Intra-operator 1 reliability (ICC) | Intra-operator 2 reliability (ICC) | |
| Diaphragm shear modulus (kPa) | 72 | 13.1 (4.2) | 14.2 (4.6) | 0.31 | 0.92 [0.71–0.98] | 0.93 [0.82–0.98] | 0.92 [0.81–0.98] |
| Biceps shear modulus (kPa) | 70 | 18.2 (10) | 17.4 (8.9) | 0.71 | 0.96 [0.86–0.99] | 0.98 [0.94–0.99] | 0.99 [0.96–1] |
| Rectus femoris shear modulus (kPa) | 68 | 14.7 (9) | 18.4 (10.2) | 0.11 | 0.91 [0.51–0.98] | 0.97 [0.93–0.99] | 0.99 [0.97–1] |
Abbreviations: ICC intra-class coefficient correlation, kPa kilopascals, SD standard deviation. ICC are presented with 95% confidence interval