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CDAI & SDAI calculator
Clinical and Simplified Disease Activity Indices for rheumatoid arthritis. CDAI needs no blood test — ideal at the bedside.
Nothing is saved or sent anywhere — the calculation happens in your browser.
Result
CDAI
SDAI
Cut-offs
| Activity | CDAI | SDAI |
|---|---|---|
| Remission | ≤ 2.8 | ≤ 3.3 |
| Low | > 2.8 – 10 | > 3.3 – 11 |
| Moderate | > 10 – 22 | > 11 – 26 |
| High | > 22 | > 26 |
Smolen JS, et al. Rheumatology 2003;42:244–57 (SDAI); Aletaha D, et al. Arthritis Res Ther 2005;7:R796–806 (CDAI). CDAI needs no laboratory test, so it can be calculated at the bedside.
For healthcare professionals. This calculator supports, and does not replace, clinical judgement. Classification criteria are designed for research cohorts and are not diagnostic criteria. Check results against the source publication before acting on them.
Referring a patient?
Walk-in rheumatology OPD at AIMS Mohali — no appointment needed. A short referral note with recent results helps.
Clinic timings & location