Baseline characteristics. Values are n (%) unless otherwise specified.
| Characteristics | n = 283 |
|---|---|
| Male | 214 (76) |
| Age, yrs, mean (SD) | 42.8 (13.5) |
| Disease duration, yrs, mean (SD) | 13.2 (9.7) |
| HLA-B27+ | 181 (78)* |
| Current or history of SpA-EAM | 96 (36) |
| Acute anterior uveitis | 61 (23) |
| Inflammatory bowel disease | 21 (8) |
| Psoriasis | 28 (11) |
| BASDAI, 0–10, mean (SD) | 5.0 (1.7) |
| BASFI, 0–10, mean (SD) | 4.6 (2.3) |
↵* Data available from 231 patients [18% HLA-B27–negative and 50 patients (18%) with unknown HLA-B27 status]. SpA-EAM: spondyloarthritis extraarticular manifestations; BASDAI: Bath Ankylosing Spondylitis Disease Activity Index; BASFI: Bath Ankylosing Spondylitis Functional Index.