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Table 3 Correlation between the three measurements, intraclass correlation coefficient, limits of agreement, for three repeated measurements

From: Reference values for isometric muscle force among workers for the Netherlands: a comparison of reference values

Muscle force Corr1-2 Corr1-3 Corr2-3 ICC LCL- UCL LOA1-2 LOA1-3 LOA2-3
Elbow flex. left 0.88 0.87 0.87 0.87 0.85 - 0.89 ± 59.4 ± 61.6 ±61.0
Elbow flex. right 0.85 0.86 0.89 0.87 0.85 - 0.89 ± 67.8 ± 66.8 ± 56.3
Elbow ext. left 0.89 0.85 0.88 0.88 0.86 - 0.89 ± 42.8 ± 50.3 ±44.1
Elbow ext. right 0.91 0.91 0.93 0.92 0.90 - 0.93 ± 37.0 ± 37.2 ±32.9
Knee flex. left 0.83 0.81 0.87 0.84 0.81 - 0.86 ± 75.9 ± 82.5 ±68.8
Knee flex. right 0.87 0.82 0.88 0.86 0.83 - 0.88 ± 69.8 ± 81.4 ±67.8
Knee ext. left 0.88 0.85 0.91 0.88 0.86 - 0.89 ± 104.0 ±117.8 ±94.3
Knee ext. right. 0.91 0.90 0.94 0.92 0.90 - 0.93 ± 96.3 ± 106.7 ± 80.2
Abduction left 0.83 0.80 0.87 0.83 0.80 - 0.86 ± 55.2 ± 59.5 ±48.4
Abduction right 0.85 0.87 0.92 0.88 0.85 - 0.90 ± 52.6 ± 46.5 ±37.3
  1. Corr: Correlation, ICC: intraclass correlation coeficient, LCL: lower control limit, UCL: upper control limit, LOA: limits of agreement.