Table 1

 Patients’ baseline characteristics

BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; CRP, C reactive protein (normal value <5 mg/l); DMARDs, disease-modifying antirheumatic drugs; HLA, human leucocyte antigen; IBD, inflammatory bowel disease; NSAIDs, non-steroidal anti-inflammatory drugs.
Mean (SD, range) age (years)40 (9.2, 24–59)
Mean (SD, range) disease duration (years)14 (10.2, 1–39)
Sex, male:female (n)14:6
HLA-B27 positivity (%)85
Mean (SD, range) BASDAI at screening5.6 (1.2, 4–9.3)
CRP >10 mg/l at screening (%)40
Peripheral arthritis at screening (n)7
Enthesitis at screening (Berlin scale) (n)8
IBD (history and at screening) (n)0
Psoriasis (history and at screening) (n)4
History of anterior uveitis (n)3
Concomitant treatment at screening
    NSAIDs (n)20
    Glucocorticoids (n)4
    Previous DMARDs (n)6