Table 2 Strain inter- and intra-observer reproducibility

0.1 ± 1.5

0.98 (0.95, 0.99)

1.15 ± 0.99

3.46 (0.98–7.79)

0.8 ± 3.0

0.92 (0.79, 0.97)

1.99 ± 2.25

5.83 (3.04–10.00)

0.8 ± 2.2

0.95 (0.85, 0.98)

1.90 ± 1.22

11.38 (6.00–19.61)

− 1.8 ± 2.5

0.95 (0.79, 0.98)

2.36 ± 1.91

7.91 (2.95–10.76)

0.5 ± 1.8

0.96 (0.90, 0.99)

1.61 ± 0.76

9.14 (6.00–20.47)

− 1.1 ± 2.6

0.96 (0.88, 0.98)

2.25 ± 1.54

7.10 (4.07–12.64)

0.6 ± 1.8

0.96 (0.90, 0.99)

1.60 ± 0.98

10.74 (4.56–19.76)

− 1.5 ± 2.7

0.95 (0.83, 0.98)

2.49 ± 1.74

9.04 (4.78–11.99)

0.2 ± 4.5

0.80 (0.50, 0.93)

3.55 ± 2.59

17.17 (13.73–24.00)

0.3 ± 3.1

0.95 (0.85, 0.98)

2.26 ± 2.03

4.72 (3.40–19.88)

1.5 ± 2.7

0.91 (0.73, 0.97)

2.58 ± 1.62

15.53 (7.16–25.24)

−2.9 ± 2.7

0.92 (0.42, 0.98)

3.17 ± 2.38

11.38 (5.34–17.89)

0.6 ± 2.6

0.79 (0.49, 0.92)

1.72 ± 2.02

3.19 (1.31–11.11)

0.2 ± 1.8

0.94 (0.84, 0.98)

1.21 ± 1.34

3.10 (1.09–6.52)

0.7 ± 2.0

0.79 (0.49, 0.92)

1.41 ± 1.59

2.70 (0.98–10.00)

− 0.4 ± 2.0

0.94 (0.84, 0.98)

1.75 ± 0.93

5.82 (3.43–8.64)

0.8 ± 2.5

0.73 (0.37, 0.90)

1.89 ± 1.80

7.55 (3.12–11.45)

0.1 ± 2.6

0.90 (0.73, 0.97)

2.07 ± 1.48

6.21 (2.62–10.46)

1.2 ± 2.5

0.73 (0.38, 0.90)

2.00 ± 1.87

5.31 (3.73–14.99)

0.1 ± 2.4

0.91 (0.75, 0.97)

2.04 ± 1.06

5.56 (3.81–9.27)

2.1 ± 2.9

0.65 (0.16, 0.88)

2.73 ± 2.29

11.00 (4.12–19.45)

− 1.0 ± 1.6

0.94 (0.79, 0.98)

1.27 ± 1.36

2.47 (0.72–5.32)

1.0 ± 1.7

0.82 (0.49, 0.94)

1.51 ± 1.26

5.18 (2.84–10.29)

0.0 ± 2.0

0.93 (0.79, 0.97)

1.47 ± 1.34

3.58 (0.34–6.45)