ASAS classification criteria for axial spondyloarthritis
Rheumatology
Also known as: ASAS-Klassifikationskriterien der axialen Spondyloarthritis · ASAS aksiyel spondiloartrit sınıflama kriterleri
What it is for
Assessment of SpondyloArthritis international Society (ASAS) classification criteria for axial spondyloarthritis (SpA), covering radiographic and non-radiographic disease. Entry: back pain for at least 3 months with onset before age 45 years.
Classification
| Category | Description |
|---|---|
| Imaging arm | sacroiliitis on imaging plus at least 1 SpA feature. Sacroiliitis means active (acute) inflammation on magnetic resonance imaging (MRI) highly suggestive of SpA-associated sacroiliitis, or definite radiographic sacroiliitis according to the modified New York criteria. |
| Clinical arm | HLA-B27 positive plus at least 2 other SpA features. |
| SpA features | inflammatory back pain; arthritis; enthesitis (heel); uveitis; dactylitis; psoriasis; Crohn's disease or ulcerative colitis; good response to non-steroidal anti-inflammatory drugs (NSAIDs); family history of SpA; HLA-B27; elevated C-reactive protein (CRP). |
| Note | a separate ASAS criteria set exists for peripheral SpA (patients without back pain). |
Source
The development of Assessment of SpondyloArthritis international Society classification criteria for axial spondyloarthritis (part II): validation and final selection
ASAS · Ann Rheum Dis 2009;68:777–783 (Rudwaleit M et al.)
PMID: 19297344
- Edition
- ASAS 2009 (axial SpA; current)
- Checked on
Summary of the published classification in our own words. Not a substitute for the original publication.
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