Skip to main content

Table 2 Mean and inter-operator reproducibility of shear modulus measurements in healthy subjects for various probe positions (training set, n = 16)

From: Real-time shear wave ultrasound elastography: a new tool for the evaluation of diaphragm and limb muscle stiffness in critically ill patients

Measurements

Healthy subjects (n = 16)

n measures

Operator 1 Mean (SD)

Operator 2 Mean (SD)

t-test* (p value)

Inter-operator reproducibility (ICC)

Diaphragm shear modulus—longitudinal view (kPa)

32

19.4 (6.2)

20.1 (7)

0.19

0.83 [0.50 to 0.94]

Diaphragm shear modulus—transverse view (kPa)

32

25.4 (7.3)

22.4 (6.3)

0.73

0.3 [−0.86 to 0.75]

Biceps brachii shear modulus—transverse view (kPa)

32

11.1 (3.6)

16.1 (6)

< 0.05

0.39 [−0.29 to 0.76]

Biceps brachii shear modulus—longitudinal view (kPa)

32

28.9 (8.1)

27.8 (6.3)

0.82

0.88 [0.67 to 0.96]

Rectus femoris shear modulus—transverse view (kPa)

32

23 (6.8)

24.6 (8.3)

0.21

0.82 [0.50 to 0.94]

Rectus femoris shear modulus—longitudinal view (kPa)

32

15 (4.9)

15.4 (5.4)

0.57

0.76 [0.34 to 0.91]

  1. Abbreviations: ICC intra-class coefficient correlation, kPa kilopascals, SD standard deviation. ICC are presented with 95% confidence interval