The Clinical Disease Activity Index (CDAI) is a simple, fully clinical score used to measure how active rheumatoid arthritis (RA) is at a given moment. Unlike DAS28, it doesn’t use blood tests, so it can be calculated immediately at the bedside.
CDAI Calculator
Clinical Disease Activity Index for Rheumatoid Arthritis (no lab tests, educational use only).
1. Joint counts
Number of tender joints out of the standard 28 joints.
Number of swollen joints out of the standard 28 joints.
2. Global assessments (0–10)
0 = no disease activity; 10 = worst possible disease activity (patient’s view).
0 = no disease activity; 10 = worst possible disease activity (clinician’s view).
CDAI score
0.0
Important:
- This calculator is for education only and does not replace rheumatology assessment.
- CDAI should be interpreted alongside joint exam, imaging, comorbidities, and treatment goals.
- Never change medication or treatment based solely on this tool.
