Table 1

Clinical characteristics of patients with AS

VariablesNo of patients with dataValue
Age at diagnosis, mean (SD), year33833.1 (9.8)
Female (%)33835 (10)
Disease duration, mean (SD), year33812.6 (3.6)
Duration treated with TNFis per patient, mean (SD), year3386.6 (3.4)
Duration not treated with TNFis per patient, mean (SD), year3381.8 (2.1)
HLA-B27 (%)336329 (97.9)
Eye involvement (%)309142 (46.0)
Peripheral joint involvement (%)305170 (55.7)
ESR at baseline, mean (SD), mm3/hour33836.9 (32.1)
CRP at baseline, mean (SD), mg/dL3382.6 (2.6)
mSASSS at baseline, mean (SD)33817.0 (18.6)
  • AS, ankylosing spondylitis; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; cDMARDs, conventional disease-modifying anti-rheumatic drugs; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; HLA, human leucocyte antigen; mSASSS, modified Stoke Ankylosing Spondylitis Spinal Score; NSAIDs, non-steroidal anti-inflammatory drugs; TNFis, tumour necrosis factor inhibitors.