|
View
|
Observer
|
JSW (mm; mean ± SD)
|
Mean difference (mm; mean ± SD)
|
Limits of agreements
|
ICC values (95% CI)
|
|---|
| | |
Reading 1
|
Reading 2
| | | |
|---|
|
Pelvic view
|
1
|
2.33 ± 0.81
|
2.34 ± 1.07
|
-0.01 ± -0.24
|
-0.49 to +0.47
|
0.96 (0.93–0.98), 0.99
|
| |
2
|
2.67 ± 0.81
|
2.66 ± 1.02
|
-0.02 ± 0.16
|
-0.30 to +0.34
|
(0.98–0.99) 0.98 (0.97–0.99)
|
| |
Mean (1 + 2)
|
2.50 ± 0.91
|
2.50 ± 0.89
|
0.004 ± 0.14
|
-0.28 to +0.28
| |
|
Hip AP
|
1
|
2.41 ± 0.86
|
2.40 ± 0.86
|
0.01 ± 0.25
|
-0.49 to +0.51
|
0.96 (0.93–0.98), 0.99
|
| |
2
|
2.69 ± 1.05
|
2.68 ± 1.01
|
0.01 ± 0.15
|
-0.29 to +0.31
|
(0.98–0.99) 0.98 (0.97–0.99)
|
| |
Mean (1 + 2)
|
2.55 ± 0.94
|
2.54 ± 0.92
|
0.01 ± 0.16
|
-0.30 to +0.32
| |
|
Oblique
|
1
|
2.37 ± 0.79
|
2.29 ± 0.78
|
0.08 ± 0.37
|
-0.89 to +0.71
|
0.88 (0.80–0.93), 0.98
|
| |
2
|
2.69 ± 0.78
|
2.70 ± 1.01
|
-0.02 ± 0.21
|
-0.41 to +0.51
|
(0.96–0.99) 0.96 (0.94–0.98)
|
| |
Mean (1 + 2)
|
2.53 ± 0.85
|
2.50 ± 0.87
|
0.03 ± 0.21
|
-0.29 to +0.35
| |
- Shown is the cross-sectional intraobserver reproducibility of radiographic measurements of joint space width (JSW) performed on baseline radiographs. CI, confidence interval; ICC, intraclass coefficient of correlation; SD, standard deviation.
