|
View
|
Observer
|
JSW change (mm; mean ± SD)
|
Difference (mm; mean ± SD)
|
95% CI approximation of bias
|
Limits of agreements
|
ICC value (95% CI)
|
SRM calculated on reading 1 (95% CI)
|
|---|
| | |
Reading 1
|
Reading 2
| | | | | |
|---|
|
Pelvic
|
1
|
-0.40 ± 0.65
|
-0.49 ± 0.54
|
0.09 ± 0.36
|
-0.01 to +0.19
|
-0.63 to +0.81
|
0.81 (0.69–0.89)
|
-0.61 (-0.65 to -0.57)
|
| |
2
|
-0.54 ± 0.66
|
-0.49 ± 0.67
|
-0.05 ± 0.16
|
-0.09 to -0.01
|
-0.37 to +0.27
|
0.97 (0.95–0.98)
|
-0.82 (-0.84 to -0.80)
|
| |
Mean (1 + 2)
|
-0.47 ± 0.62
|
-0.49 ± 0.57
|
0.02 ± 0.18
|
-0.2 to +0.06
|
-0.34 to +0.38
|
0.95 (0.92–0.97)
|
-0.76 (-0.77 to -0.73)
|
|
Hip AP
|
1
|
-0.39 ± 0.61
|
-0.46 ± 0.59
|
0.07 ± 0.30
|
-0.01 to +0.15
|
-0.53 to +0.67
|
0.87 (0.78–0.92)
|
-0.64 (-0.67 to -0.61)
|
| |
2
|
-0.49 ± 0.66
|
-0.49 ± 0.66
|
-0.00 ± 0.14
|
-0.04 to +0.04
|
-0.28 to +0.28
|
0.97 (0.96–0.99)
|
-0.75 (-0.77 to -0.73)
|
| |
Mean (1 + 2)
|
-0.44 ± 0.62
|
-0.48 ± 0.60
|
0.03 ± 0.16
|
-0.01 to +0.07
|
-0.29 to +0.35
|
0.96 (0.94–0.98)
|
-0.72 (-0.74 to -0.70)
|
|
Oblique
|
1
|
-0.46 ± 0.59
|
-0.37 ± 0.50
|
-0.09 ± 0.40
|
-0.21 to +0.03
|
-0.89 to +0.71
|
0.73 (0.57–0.84)
|
-0.77 (-0.80 to -0.74)
|
| |
2
|
-0.47 ± 0.67
|
-0.52 ± 0.64
|
0.05 ± 0.23
|
-0.10 to +0.11
|
-0.41 to +0.51
|
0.93 (0.88–0.96)
|
-0.70 (-0.74 to -0.67)
|
| |
Mean (1 + 2)
|
-0.46 ± 0.61
|
-0.45 ± 0.53
|
0.03 ± 0.16
|
-0.10 to +0.07
|
-0.29 to +0.35
|
0.91 (0.85–0.95)
|
-0.76 (-0.79 to -0.73)
|
- Shown is the longitudinal intraobserver reproducibility and sensitivity to change (standardized response mean [SRM]) of radiographic measurements of joint space width (JSW; change from baseline [M0] to M36) on 3 different views read by two observers (and their mean). AP, anteroposterior; CI, confidence interval; ICC, intraclass coefficient of correlation; SD, standard deviation.
