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Table 4 Interobserver reproducibility of joint space width measurements

From: Reproducibility and sensitivity to change of various methods to measure joint space width in osteoarthritis of the hip: a double reading of three different radiographic views taken with a three-year interval

View Observer Baseline JSW reading 1 (mm; mean ± SD) Mean of difference (mm; mean ± SD) ICC (95% CI) Joint space change from M0 to M36 in reading 1 (mm) ICC (95% CI)
Pelvic 1 2.33 ± 0.81 -0.34 ± 0.52 0.80 (0.52–0.91) -0.40 ± 0.65 0.79 (0.65–0.88)
  2 2.67 ± 1.07    -0.54 ± 0.66  
Hip AP 1 2.41 ± 0.86 -0.27 ± 0.39 0.88 (0.66–0.95) -0.39 ± 0.61 0.87 (0.78–0.93)
  2 2.69 ± 1.05    -0.49 ± 0.66  
Oblique 1 2.37 ± 0.79 -0.31 ± 0.61 0.72 (0.50–0.85) -0.46 ± 0.59 0.86 (0.76–0.92)
  2 2.69 ± 1.00    -0.47 ± 0.67  
  1. Shown is the interobserver reproducibility of joint space width (JSW) measurements between the two readers for the three radiographic views. AP, anteroposterior; CI, confidence interval; ICC, intraclass coefficient of correlation; SD, standard deviation.