CRP, ESR, and presence of BME at baseline in nr-axSpA and AS. All values are n (%).
| Variables | nr-axSpA, n = 62 | AS, n = 259 |
|---|---|---|
| CRP < 0.6 mg/dl | 29 (46.8) | 43 (16.6) |
| CRP ≥ 0.6 mg/dl | 33 (53.2) | 216 (83.4) |
| ESR < 16 mm/h | 39 (62.9) | 199 (76.8) |
| ESR ≥ 16 mm/h | 23 (37.1) | 60 (23.2) |
| Presence of BME on MRI | 25 (73.5) | — |
| Absence of BME on MRI | 9 (26.5) | — |
CRP: C-reactive protein; ESR: erythrocyte sedimentation rate; BME: bone marrow edema; nr-axSpA: nonradiographic axial spondyloarthritis; AS: ankylosing spondylitis; MRI: magnetic resonance imaging.