Table 2. Measures of interobserver agreement for grading of osteoarthritis on MRI and radiographs.
All patients | SLAC | SNAC | |||||
---|---|---|---|---|---|---|---|
Kappa (kw) | Interpretation | Kappa (kw) | Interpretation | Kappa (kw) | Interpretation | ||
Radiographs | First read | 0.56 | Moderate | 0.52 | Moderate | 0.57 | Moderate |
Second read | 0.54 | Moderate | 0.34 | Fair | 0.66 | Substantial | |
MRI | First reads | 0.75 | Substantial | 0.62 | Substantial | 0.76 | Substantial |
Abbreviations: MRI, magnetic resonance imaging; SNAC, scaphoid nonunion advanced collapse; SLAC, scapholunate advanced collapse.