🦴 CDAI Clinical Disease Activity Index (Rheumatoid Arthritis)
UseEnter tender and swollen 28-joint counts plus patient and physician global assessments (0–10); the tool retur…
SourceAletaha D, et al. Acute phase reactants add little to composite disease activity indices for rheuma…
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
Because it contains no acute-phase reactant, CDAI can be computed instantly at the bedside and is unaffected by infection or other causes of a raised CRP/ESR (original synthesis · not guideline verbatim).
When to use
Enter tender and swollen 28-joint counts plus patient and physician global assessments (0–10); the tool returns the 0–76 score and activity band.
How it works
CDAI = tender joint count (0–28) + swollen joint count (0–28) + patient global (0–10) + physician global (0–10). ≤2.8 remission, ≤10 low, ≤22 moderate, >22 high activity.
Key points
- Because it contains no acute-phase reactant, CDAI can be computed instantly at the bedside and is unaffected by infection or other causes of a raised CRP/ESR (original synthesis · not guideline verbatim).
- Treat-to-target strategies commonly aim for CDAI low activity or remission, reassessed at defined intervals until target is reached.
- Both global assessments use a 0–10 scale here; CDAI tracks closely with the CRP-containing SDAI in routine practice.
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 (28 joints) | 0 joints |
|---|---|
| Swollen joint count (28 joints) | 0 joints |
| Patient global assessment (0–10) | 0 cm |
| Physician global assessment (0–10) | 0 cm |
→CDAI0/76 · Clinical remission
- Calculation：CDAI = tender 0 + swollen 0 + patient 0 + physician 0 = 0
- Strata：≤2.8 remission · ≤10 low · ≤22 moderate · >22 high disease activity.
- Features：Contains no acute-phase reactant (no ESR/CRP needed) and is computed instantly at the bedside; treat-to-target (T2T) commonly targets CDAI low activity or remission.
Verification & sources · governance
FAQ
Frequently asked questions
- What are the limits and cautions when using CDAI Clinical Disease Activity Index (Rheumatoid Arthritis)?
- 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 (Rheumatoid Arthritis) 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 (Rheumatoid Arthritis) calculated in practice? Can you show a worked example?
- Inputs: Tender joint count (28 joints) 0 joints, Swollen joint count (28 joints) 0 joints, Patient global assessment (0–10) 0 cm, Physician global assessment (0–10) 0 cm → Result: CDAI 0 /76 · Clinical remission（Calculation: CDAI = tender 0 + swollen 0 + patient 0 + physician 0 = 0, Strata: ≤2.8 remission · ≤10 low · ≤22 moderate · >22 high disease activity., Features: Contains no acute-phase reactant (no ESR/CRP needed) and is computed instantly at the bedside; treat-to-target (T2T) commonly targets CDAI low activity or remission.）