Baseline demographics between patients with ankylosing spondylitis (AS) and patients with non-radiographic axial spondyloarthrititis (nr-axSpA)
| Parameter | ETA, AS (n=20) | ETA, nr-axSpA (n=20) |
|---|---|---|
| Age in years, mean (±SD) | 33.8 (±8.2) | 33.3 (±9.1) |
| Disease duration in years, mean (±SD) | 2.7 (±1.6) | 2.6 (±1.8) |
| Male, % | 60 | 55 |
| HLA-B27+, % | 90 | 80 |
| BASDAI (0–10), mean (±SD) | 5.5 (±1.4) | 5.6 (±1.3) |
| CRP (<5 mg/l), mean (±SD) | 9.4 (±9.9) | 14.4 (±15.7) |
| ASDAS (0–∞), mean (±SD) | 3.2 (±0.7) | 3.6 (±0.9) |
| BASFI (0–10), mean (±SD) | 4.2 (±2.2) | 4.5 (±2.4) |
| MRI spine score (0–69), mean (±SD) | 3.4 (±4.3) | 1.3 (±1.9) |
| MRI SI-joint score (0–24), mean (±SD) | 8.6 (±6.8) | 7.1 (±5.9) |
No statistical differences between patients with AS versus nr-axSpA were found for any of the parameters (p>0.05).
AS, ankylosing spondylitis; ASDAS, Ankylosing Spondylitis Disease Activity Score; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; BASFI, Bath Ankylosing Spondylitis Functional Index; CRP, C-reactive protein; ETA, etanercept; nr-axSpA, nonradiographic axial spondyloarthritis; .