Concordance between MRI and x-ray findings on the structural damage of the spine
| Structural damage of the spine on conventional x-rays* | |||
|---|---|---|---|
| Yes | No | ||
| Structural damage of the spine on MRI† | Yes | 11 | 33 |
| No | 35 | 532 | |
*Defined as an mSASSS score of ≥2 (presence of at least one syndesmophyte) at at least one vertebral edge of each individual patient.
†Defined as presence of sclerosis, erosions or syndesmophytes on the vertebrae by scoring of the MRI scans as normal (grade 0), doubtful (grade 1) or abnormal (grade 2). For this analysis, structural damage of the spine on MRI yes=grade 2.
mSASSS, modified Stoke Ankylosing Spondylitis Spine Score.