Table 2.
Interobserver reliability of three observers’ ratings for five measurement parameters
| Measurement parameter | Radiograph | 3D CT/2D CT* | ||||||
|---|---|---|---|---|---|---|---|---|
| Trial 1 | Trial 2 | Trial 1 | Trial 2 | |||||
| ICC | 95% CI | ICC | 95% CI | ICC | 95% CI | ICC | 95% CI | |
| M/L displacement | 0.49 | 0.17–0.71 | 0.36 | 0.04–0.62 | 0.48 | 0.13–0.71 | 0.51 | 0.23–0.71 |
| Translation | 0.68 | 0.54–0.79 | 0.53 | 0.36–0.68 | 0.80 | 0.70–0.88 | 0.60 | 0.44–0.74 |
| Angulation | 0.59 | 0.42–0.73 | 0.57 | 0.41–0.72 | 0.66 | 0.48–0.79 | 0.80 | 0.70–0.88 |
| GPA | 0.76 | 0.64–0.85 | 0.55 | 0.38–0.70 | 0.83 | 0.74–0.90 | 0.87 | 0.80–0.92 |
| Glenoid version | NA | NA | NA | NA | 0.84 | 0.75–0.91 | 0.74 | 0.62–0.84 |
* M/L displacement, translation, angulation and GPA were measured on 3D CT; glenoid version was measured on 2D CT; 3D = three-dimensional; 2D = two-dimensional; ICC = interclass correlation coefficient; CI = confidence interval; M/L = medial/lateral; GPA = glenopolar angle; NA = not applicable.