Table 1.
Summary of all kappa statistics for all dichotomous variables
| Item | Raters 1 & 2 | Raters 3 & 4 | ||
|---|---|---|---|---|
| κ | % Agree | κ | % Agree | |
| Image Satisfactory | .278 | 64.8 | .393 | 68.6 |
| Spinous Position | .641 | 84.3 | .537 | 84.3 |
| Asymmetry of Odontoid-Lateral Mass | .424 | 74.4 | .698 | 91.3 |
| Normal spinous movement -right | aN/C | 81.8 | aN/C | 97.9 |
| Normal spinous movement-left | aN/C | 97.1 | aN/C | 97.9 |
| Midline of dens to right lateral mass | .393 | 67.5 | .424 | 72.5 |
| Midline of dens to left lateral mass | .302 | 62.2 | .697 | 85.7 |
| step off right | .566 | 78.6 | .465 | 75.6 |
| step off left | .778 | 89.2 | .665 | 84.4 |
aN/C Not Calculated. The extremely high prevalence of normal spinous movement during lateral bending confounded the calculation of kappa statistics for this measurement