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Comparison of radiographs according to the modNY criteria with MRI.
| MRI | Total | |||
| X-ray according to modNY | No of patients | Normal image | Sacroiliitis | |
| Normal image | 53 (53%) | 33 (33%) | 86 (86%) | |
| Sacroiliitis | 7 (7%) | 7 (7%) | 14 (14%) | |
| Total | 60 (60%) | 40 (40%) | 100 (100%) | |
| Comparison | X-ray and MRI agreement=60% Cohen’s kappa coefficient=0.06; CI: 0–0.29 |
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CI – confidence interval.
