Clinical use
Use this calculator for bath ankylosing spondylitis disease activity index in therheumatology workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.
Calculate BASDAI
Interpretation
<4 = low activity. ≥4 = active disease, consider biologic therapy. ≥4 despite 2+ NSAIDs over 4 weeks = eligible for biologics per NICE/ASAS.
Required inputs
- Fatigue
- Spinal Pain
- Peripheral Joint Pain
- Enthesitis
- Morning Severity
- Morning Duration
Evidence and limitations
This page cites 1 published reference. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.
References
- Garrett S et al. J Rheumatol 1994;21:2286-2291
Frequently asked questions
What is the BASDAI?
BASDAI is a clinical calculator used for Bath Ankylosing Spondylitis Disease Activity Index.
How do I interpret the BASDAI?
<4 = low activity. ≥4 = active disease, consider biologic therapy. ≥4 despite 2+ NSAIDs over 4 weeks = eligible for biologics per NICE/ASAS.
What inputs are required for the BASDAI?
Required inputs include Fatigue, Spinal Pain, Peripheral Joint Pain, Enthesitis, Morning Severity, Morning Duration.
What is the evidence behind the BASDAI?
The BASDAI page cites Garrett S et al. J Rheumatol 1994;21:2286-2291.
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