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Table 1 Characteristics of the study subjectsa

From: Anterior chest wall inflammation by whole-body magnetic resonance imaging in patients with spondyloarthritis: lack of association between clinical and imaging findings in a cross-sectional study

Variable SpA group
(n= 122)
AS group
(n= 95)
nrSpA group
(n= 27)
Control group
(n= 75)
Male:female ratio (% male) 90:32 (73.8) 73:22 (76.8) 17:10 (63.0) 42:33 (56.0)
Age, years 33.8 [17.3 to 71.6] 35.7 [17.3 to 71.6] 27.0 [18.8 to 44.8] 30.3 [17.7 to 63.8]
Symptom duration, years 7.0 [0.3 to 41.0] 11.0 [0.3 to 41.0] 1.2 [0.3 to 5.0] N/A
HLA-B27-positive, n (%)b 105/120 (87.5) 81/93 (87.1) 24/27 (88.9) N/A
BASDAI, NRS range 0 to 10 4.4 [0.4 to 9.0] 4.6 [0.4 to 9.0] 3.9 [0.8 to 6.3] N/A
BASFI, NRS range 0 to 10 2.9 [0 to 8.2] 3.2 [0 to 7.8] 2.1 [0 to 8.2] N/A
BASMI, NRS range 0 to 10 1.0 [0 to 8.0] 1.0 [0 to 8.0] 0 [0 to 4.0] N/A
CRP level, mg/L 5.0 [0 to 150.0] 5.0 [0 to 57.0] 3.0 [0 to 150.0] N/A
ESR (mm/hour) 12.5 [1.0 to 72.0] 14.0 [2.0 to 69.0] 8.5 [1.0 to 72.0] N/A
  1. aAS = ankylosing spondylitis; BASDAI = Bath Ankylosing Spondylitis Disease Activity Index [23]; BASFI = Bath Ankylosing Spondylitis Functional Index [24]; BASMI = Bath Ankylosing Spondylitis Metrology Index [25]; CRP = C-reactive protein, reference range ≤5 mg/L; ESR = erythrocyte sedimentation rate; HLA-B27 = human leukocyte antigen B27; N/A = not applicable; NRS = numeric rating scale; nrSpA = nonradiographic axial spondyloarthritis; SpA = spondyloarthritis. bHLA-B27 was not tested in two patients in the AS group. Values for the continuous demographic and clinical variables are medians [IQR] unless otherwise stated.