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Table 1 Baseline characteristics of 298 patients with ankylosing spondylitis

From: Incidence and predictors of morphometric vertebral fractures in 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)  
  1. 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.