Table 3.
Bland-Altman limits of agreement and bias (mean and SD). Interobserver agreement (n = 147), intraobserver agreement (n = 63)
| Bias, mean ± SD | Bias, 95% CI | Limits of agreement | Lower limit of agreement, 95% CI | Upper limit of agreement, 95% CI | ||
|---|---|---|---|---|---|---|
| Tilt | O1 Intraobserver | -1.25 ± 6.89 | -2.99, 0.49 | -14.76, 12.26 | -17.79, -12.82 | 10.32, 15.29 |
| O2 Intraobserver | -0.83 ± 3.99 | -1.09, 0.92 | -7.92, 7.75 | -9.68, -6.79 | 6.63, 9.51 | |
| O1&2 Interobserver | -1.15 ± 7.11 | -2.31, 0.01 | -15.09, 12.80 | -16.96, -13.70 | 11.40, 14.66 | |
| Radial inclination | O1 Intraobserver | 1.27 ± 1.38 | 0.93, 1.62 | -1.42, 3.97 | -2.03, -1.04 | 3.58, 4.57 |
| O2 Intraobserver | 0.22 ± 1.53 | -0.17, 0.61 | -2.78, 3.23 | -3.46, -2.35 | 2.79, 3.90 | |
| O1&2 Interobserver | -0.78 ± 2.08 | -1.12, -0.44 | -4.86, 3.29 | -5.41, -4.45 | 2.89, 3.84 | |
| Ulnar variance | O1 Intraobserver | 0.01 ± 0.79 | -0.21, 0.20 | -1.56, 1.55 | -1.91, -1.34 | 1.33, 1.9 |
| O2 Intraobserver | -0.3 ± 1.53 | 0.09, -0.68 | -3.29, 2.70 | -3.96, -2.86 | 2.27, 3.37 | |
| O1&2 Interobserver | 0.29 ± 1.23 | 0.09, 0.49 | -2.11, 2.69 | -2.43, -1.87 | 2.45, 3.02 |
CI Confidence interval, n Number of images, SD Standard deviation, O1 Observer 1, O2 Observer 2. Tilt and radial inclination are reported in degrees (negative values for dorsal tilt, positive values for palmar tilt, ulnar variance in millimeters)