🦴 CDAI (Clinical Disease Activity Index, RA)
UseAssess RA disease activity at the bedside and support treat-to-target follow-up.
SourceAletaha D, et al. Acute phase reactants add little to composite disease activity indices (CDAI). Ar…
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.
Methodology · worked example, guidelines & full notes
Excludes acute-phase reactants, so it can be scored instantly.
When to use
Assess RA disease activity at the bedside and support treat-to-target follow-up.
How it works
CDAI = tender joints (0–28) + swollen joints (0–28) + patient global (0–10) + physician global (0–10). ≤ 2.8 remission, ≤ 10 low, ≤ 22 moderate, > 22 high.
Key points
- Excludes acute-phase reactants, so it can be scored instantly.
- Complements DAS28 and SDAI.
- Useful for treat-to-target monitoring.
References
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Tender joint count (0–28) | 5 joints |
|---|---|
| Swollen joint count (0–28) | 3 joints |
| Patient global assessment (0–10) | 4 cm |
| Physician global assessment (0–10) | 3 cm |
→CDAI15.0
- Disease activity：Moderate activity
Verification & sources · governance
FAQ
Frequently asked questions
- What are the limits and cautions when using CDAI (Clinical Disease Activity Index, RA)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- Does CDAI (Clinical Disease Activity Index, RA) upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is CDAI (Clinical Disease Activity Index, RA) calculated in practice? Can you show a worked example?
- Inputs: Tender joint count (0–28) 5 joints, Swollen joint count (0–28) 3 joints, Patient global assessment (0–10) 4 cm, Physician global assessment (0–10) 3 cm → Result: CDAI 15.0（Disease activity: Moderate activity）