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Table 2 Inter-rater reproducibility of knee RoM measurement

From: Reproducibility of goniometric measurement of the knee in the in-hospital phase following total knee arthroplasty

Tested movements Observer A (degrees) Observer B (degrees) Agreement observer A-B ICC (95%CI)
  mean ± sd mean ± sd md ± sd LoA*  
Active Flexion sitting 81.4 10.7 78.3 11.3 3.1 5.3 -7.5 – 13.7 0.86 (0.64–0.94)
Passive flexion sitting 85.8 10.5 83.1 11.4 2.7 4.7 -6.7 – 12.1 0.88 (0.69–0.95)
Active flexion supine 70.6 13.2 70.5 17.0 0.06 7.3 -14.6 – 14.7 0.89 (0.78–0.95)
Passive flexion supine 79 12.8 77.6 17.0 1.4 8.8 -16.2 – 19 0.88 (0.77–0.94)
Active extension 11.1 5.0 10.2 4.7 0.9 4.1 -7.3 – 9.0 0.64 (0.38–0.81)
Passive extension 8.8 5.1 6.6 4.8 2.2 4.2 -6.2 – 10.6 0.62 (0.28–0.80)
  1. Sd, standard deviation; md, mean difference; CI, confidence interval; LoA, limits of agreement, calculated as the mean difference between observers ± 1.96SD of this mean difference.