ASDAS-CRP

ASAS-endorsed axial SpA disease activity score using CRP and 4 patient-reported items.

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.

Patient-reported (0–10)

Back pain

0 / 10

Duration of morning stiffness

0 / 10

Patient global assessment

0 / 10

Peripheral pain/swelling

0 / 10

CRP

Unit

mg/L

mg/dL (×10 conversion)

CRP value

mg/L

Live result

Enter CRP.

Interpretation

Formula: 0.12·BP + 0.06·MS + 0.11·PtG + 0.07·PP + 0.58·ln(CRP mg/L + 1)

Sources

ASAS ASDAS calculator and formula

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 Axial Spondyloarthritis

Imaging and clinical arms for axial spondyloarthritis classification.

Open tool

Spondyloarthritis · Classification criteria

ASAS Criteria for Peripheral Spondyloarthritis

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

Open tool

Spondyloarthritis · Disease activity score

BASDAI

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

Open tool

Spondyloarthritis · Functional index

BASFI

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

Open tool

Discuss a case with my clinic

For colleagues considering referral or shared care, please WhatsApp my clinic for professional-to-professional discussion.

WhatsApp my clinic