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. Author manuscript; available in PMC: 2017 Jun 1.
Published in final edited form as: J Rheumatol. 2016 Oct 1;43(12):2171–2178. doi: 10.3899/jrheum.150835

Table 2.

Inter-Observer and Intra-Observer Reliability for Measurement of Passive Knee Range of Movement

Knee PROM Inter-observer Agreement
Intra-observer Agreement
ICC (95% CI) Mean difference (95% CI) 95% LoA (°) SEM ICC (95% CI) Mean difference (95% CI) 95% LoA (°) SEM
Flexion 0.97 (0.92, 0.99) −2.24 (−4.36, −0.12) −12.29, 7.81 1.03 0.99 (0.99, 0.99) −0.14 (−0.43, 0.70) −5.37, 5.10 0.28
Extension 0.87 (0.72, 0.94) −1.00 (−2.55, 0.55) −8.38, 6.38 0.75 0.96 (0.94, 0.98) −0.17 (−0.61, 0.27) −4.23, 3.89 0.22

Legends: ICC – intra-class correlation coefficient; CI – confidence interval; PROM –passive range of movement; LoA – limits of agreement; SEM – standard error of measurements