Table 5.
Kappa values and percentage agreement for intra-observer agreement (experienced) on the classification of CM, the classification of SM, and MRI-based qualitative parameters.
| Item | Kappa | 95% CI 1 | Percentage Agreement |
|---|---|---|---|
| CM classification | 0.79 | 0.67–0.91 | 89% |
| CM normal/abnormal | 0.81 | 0.70- 0.93 | 91% |
| SM classification | 0.95 | 0.90–1.00 | 97% |
| SM normal/abnormal | 1.00 | 1.00–1.00 | 100% |
| Presence of CSF signal between the cerebellum and the supraoccipitum | 0.76 | 0.62–0.90 | 90% |
| Presence of CSF signal at the ventral aspect of the cervicomedullary junction | 0.79 | 0.51–1.00 | 98% |
| Presence of CSF signal at the dorsal aspect of the cervicomedullary junction | 0.92 | 0.84–1.00 | 96% |
| Syrinx location | 1.00 | 1.00 to 1.00 | 100% |
1 95% confidence interval.