CDAI Calculator
Clinical Disease Activity Index for Rheumatoid Arthritis
Calculate CDAI Score
"Considering all the ways arthritis affects you, how well are you doing?"
Clinician's assessment of patient's disease activity
Formula
CDAI = Tender Joint Count + Swollen Joint Count + Patient Global + Provider Global
Enter all values to calculate CDAI score
When to Use
- •All patients with rheumatoid arthritis
- •Reassessing patients after initiating new RA medications
- •At every patient visit for optimal RA management
Why Use CDAI
The CDAI provides a comprehensive disease severity overview using only clinical data, without requiring laboratory tests. It correlates closely with laboratory-based indices (SDAI, DAS-28) and helps guide therapy intensity based on activity levels.
Key Facts
- ✓Simple and Fast: No laboratory tests required, can be calculated at point of care
- ✓Validated Tool: Widely accepted and used in clinical practice and research
- ✓Treatment Guidance: Helps determine appropriate treatment intensity and monitoring frequency
Clinical Guidance
Disease activity should be assessed at every patient visit. Early identification and aggressive treatment of high disease activity can prevent disease progression, joint damage, and long-term disability in patients with rheumatoid arthritis.