Spondyloarthritis
Ankylosing Spondylitis / Axial & Peripheral Spondyloarthritis
Classification, activity, function and mobility tools for axial and peripheral SpA.
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.
Classification criteria
ASAS Criteria for Axial Spondyloarthritis
Imaging and clinical arms for axial spondyloarthritis classification.
Classification criteria
ASAS Criteria for Peripheral Spondyloarthritis
Classification criteria for peripheral SpA when arthritis, enthesitis or dactylitis is present.
Disease activity score
BASDAI
Bath Ankylosing Spondylitis Disease Activity Index across 6 patient-reported items.
Functional index
BASFI
Bath Ankylosing Spondylitis Functional Index. 10 activities of daily living.
Metrology index
BASMI
Bath AS Metrology Index. Serial monitoring of spinal and hip mobility.
Disease activity score
ASDAS-CRP
ASAS-endorsed axial SpA disease activity score using CRP and patient-reported items.