Table 1

Baseline characteristics of 298 patients with ankylosing spondylitis
Characteristics Number (%) Mean ± SD
Sex
Women 61 (20.5)
Male 237 (79.5)
Age (years) 33.9 ± 10.9
Age at diagnosis (years) 30.1 ± 10.8
Disease duration (years) 3.8 ± 5.1
Family history of AS 27 (9.1)
HLA-B27-positive1 244 (92.1)
Back pain 293 (98.7)
History of peripheral arthritis 190 (63.8)
History of enthesitis 71 (23.8)
History of uveitis 87 (29.7)
BASDAI, score 5.4 ± 1.8
Sacroiliitis grade
Right 3.1 ± 0.7
Left 3.1 ± 0.7
Mean sacroiliitis grade 3.1 ± 0.7
SASSS, score (range) 8.6 ± 15.9 (0 to 69)
ESR, mm/h 28.6 ± 25.8
CRP, mg/L 1.7 ± 3.1
Patients on NSAIDs 245 (82.2)
Patients on sulfasalazine 141 (47.3)
Patients on MTX 86 (29.1)
Patients on TNF inhibitors 118 (39.6)
Patients on calcium 22 (11.1)
Patients on bisphosphonate 8 (2.7)

1Confirmed in 265 patients. AS, ankylosing spondylitis; BASDAI, Bath AS disease activity index; SASSS, Stokes ankylosing spondylitis spine score; NSAIDs, non-steroidal anti-inflammatory drugs; MTX, methotrexate; TNF, tumor necrosis factor.

Kang et al.

Kang et al. Arthritis Research & Therapy 2014 16:R124   doi:10.1186/ar4581

Open Data