Demographic and clinical characteristics of patients with ankylosing spondylitis (AS). Values are the number unless otherwise indicated.
| Characteristics | Active AS, n = 113 | Inactive AS, n = 48 |
|---|---|---|
| Male/female | 103/10 | 34/14 |
| Age, yrs, mean ± SD | 26 ± 9 | 30 ± 11 |
| Duration, yrs, mean ± SD | 4 ± 3 | 6 ± 4 |
| CRP, mg/l, mean ± SD | 36.20 ± 30.35 | 5.62 ± 4.69 |
| ESR, mm/h, mean ± SD | 43 ± 29 | 18 ± 15 |
| HLA-B27, positive/negative | 91/22 | 31/17 |
| BASDAI score, mean ± SD | 5.7 ± 1.6 | 3.0 ± 1.4 |
CRP: C-reactive protein; ESR: erythrocyte sedimentation rate; BASDAI: Bath Ankylosing Spondylitis Disease Activity Index.