Table 1 |
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The demographic and clinical characteristics of AS patients positive and negative for sydesmophyte |
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Clinical characteristic |
AS N = 797 (%) |
Sydesmophyte positive N = 393 (%) |
Sydesmophyte negative N = 404 (%) |
|
|
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|
Gender (female) |
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|
130 (16.3%) |
26 (15.1%) |
104 (25.7%) |
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Age at onset |
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≤16 |
117 (14.7%) |
55 (14.0%) |
62 (15.4%) |
|
17 to 40 |
533 (66.9%) |
274 (69.7%) |
259 (64.1%) |
|
41 to 60 |
47 (5.9%) |
12 (3.1%) |
35 (8.7%) |
|
>60 |
1 (0.1%) |
0 (0%) |
1 (0.2%) |
|
Undetermined |
99 (12.4%) |
52 (13.2%) |
47 (11.6%) |
|
Disease duration |
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|
<5 years |
20 (2.5%) |
4 (1.0%) |
16 (4.0%) |
|
5 to 10 years |
118 (14.8%) |
17 (4.3%) |
101 (25.0%) |
|
11 to 15 years |
134 (16.8%) |
54 (13.8%) |
80 (19.8%) |
|
16 to 20 years |
125(15.7%) |
52 (13.2%) |
73 (18.1%) |
|
>20 years |
301 (37.8%) |
214 (54.5%) |
87 (21.5%) |
|
Undetermined |
99 (12.4%) |
52 (13.2%) |
47 (11.6%) |
|
HLA-B27 positivity |
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|
739 (92.7%) |
380 (96.7%) |
359 (88.9%) |
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Baseline mSASSS at evaluati on |
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mSASSS <3 |
404 (50.7%) |
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mSASSS <24 |
120 (15.0%) |
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|
mSASSS ≤24 |
273 (34.3%) |
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|
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Sydesmophyte positive: AS patients with syndesmophyte formations (N = 393; mSASSS <24 plus mSASSS ≤24). Sydesmophyte negative, AS patients without syndesmophyte formations (N = 404; mSASSS <3) mSASSS, modified Stoke's Ankylosing Spondylitis Spinal Score |
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Wang et al. Arthritis Research & Therapy 2012 14:R125 doi:10.1186/ar3855 |
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