Agreement between local-reading and central-reading, and between local-reading and the individual central readers regarding presence/absence of sacroiliitis on MRI
| Total n=663 | Central-reading (2/3) | ||
|---|---|---|---|
| MRI-SI+ (ASAS) | MRI-SI− (ASAS) | ||
| Local-reading | MRI-SI+ | 185 | 38 |
| MRI-SI− | 51 | 389 | |
| κ (95% CI): 0.70 (0.65 to 0.76) | Positive agreement: 80.6% | Negative agreement: 89.7% | |
| Total n=663 | Central reader 1 | ||
| MRI-SI+ (ASAS) | MRI-SI− (ASAS) | ||
| Local-reading | MRI-SI+ | 180 | 43 |
| MRI-SI− | 76 | 364 | |
| κ (95% CI): 0.61 (0.55 to 0.67) | Positive agreement: 75.2% | Negative agreement: 86.0% | |
| Total n=663 | Central reader 2 | ||
| MRI-SI+ (ASAS) | MRI-SI− (ASAS) | ||
| Local-reading | MRI-SI+ | 177 | 46 |
| MRI-SI− | 51 | 389 | |
| κ (95% CI): 0.67 (0.62 to 0.73) | Positive agreement: 78.5% | Negative agreement: 88.9% | |
Positive agreement is the agreement on positive cases.
Negative agreement is the agreement on negative cases.
ASAS, Assessment of SpondyloArthritis international Society.