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Table 6 Repeatability indices for muscle stiffness

From: Lumbar muscles biomechanical characteristics in young people with chronic spinal pain

Side

Levels

ICC

95% CI

SEM (N/m)

SRD (N/m)

Triple

5-scans

Triple

5-scans

Triple

5-scans

Triple

5-scans

Left

L3

0.987

0.994

0.962–0.995

0.960–0.990

1.70

1.16

3.61

2.98

L4

0.993

0.998

0.979–0.998

0.993–0.999

1.82

0.97

3.73

2.74

L5

0.983

0.996

0.963–0.996

0.987–0.999

2.39

0.91

4.29

2.65

Right

L3

0.994

0.988

0.960–0.998

0.964–0.996

2.27

2.42

4.18

4.31

L4

0.990

0.987

0.971–0.997

0.962–0.996

2.15

2.91

4.06

4.73

L5

0.995

0.991

0.986–0.998

0.974–0.997

1.08

2.05

2.88

3.97