ASAS Criteria for Axial Spondyloarthritis

Apply only in patients with chronic back pain ≥3 months and age at onset <45 years.

For clinicians only. This tool is for healthcare professionals and clinical education only. It does not diagnose, replace clinical judgement, or replace specialist assessment. Any decisions about a patient must be based on full clinical assessment, investigations where appropriate, and current clinical guidelines.

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For clinicians only. This tool is for healthcare professionals and clinical education only. It does not diagnose, replace clinical judgement, or replace specialist assessment. Any decisions about a patient must be based on full clinical assessment, investigations where appropriate, and current clinical guidelines.

ASAS Criteria for Peripheral Spondyloarthritis

Classification criteria for peripheral SpA when arthritis, enthesitis or dactylitis is present.

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Spondyloarthritis · Disease activity score

BASDAI

Bath Ankylosing Spondylitis Disease Activity Index across 6 patient-reported items.

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Spondyloarthritis · Functional index

BASFI

Bath Ankylosing Spondylitis Functional Index. 10 activities of daily living.

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Spondyloarthritis · Metrology index