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Table 1 Demographic and clinical characteristics of the ankylosing spondylitis patients at baseline

From: Association of cytokine and matrix metalloproteinase profiles with disease activity and function in ankylosing spondylitis

Variable All patients (n= 180) Biomarker study (n= 157)
Age (years) 48.7 (37.0 to 56.5) 49.05 (38.3 to 57.7)
Duration (years) 18.0 (10.0 to 31.0) 18.0 (11.0 to 31.0)
Male 147/180 (81.7%) 130/157 (82.8%)
CRP (mg/dl) 7.9 (5.0 to 15.0) 7.0 (5.0 to 15.0)
BASDAI 4.04 (2.29 to 5.77) 4.00 (2.18 to 5.76)
BASFI 3.30 (1.80 to 5.38) 3.33 (1.78 to 5.43)
BASG 4.25 (2.12 to 6.20) 4.10 (2.15 to 6.20)
Ever smoked 106/180 (58.9%) 95/157 (63.8%)
Current smoker 47/180 (26.1%) 40/157 (25.5%)
  1. Values are median (interquartile range) unless otherwise stated. BASDAI, Bath ankylosing spondylitis disease activity index; BASFI, Bath ankylosing spondylitis functional index; BAS-G, Bath ankylosing spondylitis global health; CRP, C-reactive protein.