Clinical Disease Activity Index for RA (CDAI)

Assess disease activity in rheumatoid arthritis, without requiring lab work.

The global unit selector only affects unanswered questions
1.Swollen Joint Count?
2.Tender Joint Count?
3.Patient Global Assessment?
4.Evaluator Global Assessment?
Created by

1. Swollen Joint Count?

More Information

28 joints are assessed, including:

Shoulders, Elbows, Knees
In the hands: first through fifth metacarpophalangeal joint, the interphalangeal joint of the thumb, and the second through fifth proximal interphalangeal joint.

Created by
0/4 completed

About this Calculator

Clinical disease activity index (CDAI) is a simplification from the SDAI as it does not require the measurement of an acute phase reactant. Otherwise, it uses the same clinical assessments as the SDAI.

The CDAI correlates well with other disease activity scores and response criteria, as well as with progression of joint damage and functional impairment.

CDAI allows immediate treatment decisions to be based entirely on clinical criteria.

CDAI is calculated as follows:

  • SDAI = SJC + TJC +PGA + EGA

Where:

  • SJC = Swollen Joint Count
  • TJC = Tender Joint Count
  • PGA = Patient Global Assessment of Disease Activity
  • EGA = Evaluator Global Assessment of Disease Activity

Interpretation

  • ≤2.8: Remission
  • >2.8 and ≤10: Low Disease Activity
  • >10 and ≤22: Moderate Disease Activity
  • >22: High Disease Activity
Legal Notices and Disclaimer

© 2020 QxMD Software Inc., all rights reserved. No part of this service may be reproduced in any way without express written consent of QxMD. This information should not be used for the diagnosis or treatment of any health problem or disease. This information is not intended to replace clinical judgment or guide individual patient care in any manner. Click here for full notice and disclaimer.