Skip to main content

Table 2 Test-retest reliability

From: Stature is an essential predictor of muscle strength in children

Muscle function Side Mean Mean of difference SD of difference SEM Relative SEM (%) ICC ICC 95%CI
Handgrip ND 196.1 −8.4 28.9 20.4 10.4 0.949 [0.911 ; 0.971]
  D 211.5 −1.2 29.6 20.9 9.9 0.957 [0.926 ; 0.975]
Elbow flexion ND 24.2 −0.3 3.4 2.4 10.0 0.969 [0.947 ; 0.981]
  D 25.7 −0.6 4.2 3.0 11.7 0.954 [0.923 ; 0.973]
Elbow extension ND 19.0 −0.2 2.7 1.9 10.2 0.962 [0.936 ; 0.977]
  D 19.2 −0.2 3.1 2.2 11.2 0.950 [0.916 ; 0.970]
Knee flexion ND 40.7 −1.5 7.3 5.2 12.7 0.945 [0.908 ; 0.968]
  D 41.9 −1.4 8.3 5.8 14.0 0.930 [0.884 ; 0.958]
Knee extension ND 78.7 −5.3 17.1 12.1 15.4 0.945 [0.908 ; 0.968]
  D 84.5 −6.0 17.6 12.4 14.7 0.926 [0.870 ; 0.957]
  1. ND: non-dominant hand side; D: dominant hand side; SD: standard deviation; SEM: standard error of measurement; ICC: intraclass correlation coefficient; CI: confidence interval.
  2. Data are provided in N for handgrip and Nm for the other muscle functions tested (n = 56 subjects).