Table 1 |
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|
Characteristics of the study subjectsa |
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|
Variable |
SpA group (n = 122) |
AS group (n = 95) |
nrSpA group (n = 27) |
Control group (n = 75) |
|
|
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|
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 |
|
|
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|
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. |
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|
Weber et al. Arthritis Research & Therapy 2012 14:R3 doi:10.1186/ar3551 |
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