Minimal Disease Activity (MDA, Psoriatic Arthritis)
Minimal Disease Activity (MDA) in psoriatic arthritis (Coates 2010).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Tender joint count (68-joint) <= 1
- Yes
- Swollen joint count (66-joint) <= 1
- Yes
- PASI <= 1 or body surface area <= 3%
- Yes
- Patient pain <= 15 on a 0-100 mm VAS
- Yes
- Patient global disease activity <= 20 on a 0-100 mm VAS
- Yes
- HAQ <= 0.5
- Yes
Result: MDA 6/7 — in Minimal Disease Activity (>= 5 of 7).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 7 criteria
- TJC68 <= 1, SJC66 <= 1, PASI <= 1 or BSA <= 3%, pain <= 15 (0-100 mm), global <= 20 (0-100 mm), HAQ <= 0.5, tender entheseal points <= 1.
- >= 5 of 7
- Minimal Disease Activity (MDA), a treat-to-target state.
- 7 of 7
- Very Low Disease Activity (VLDA), a more stringent target.
What you enter
- Tender joint count (68-joint) <= 1
- Swollen joint count (66-joint) <= 1
- PASI <= 1 or body surface area <= 3%
- Patient pain <= 15 on a 0-100 mm VAS
- Patient global disease activity <= 20 on a 0-100 mm VAS
- HAQ <= 0.5
- Tender entheseal points <= 1
How this is calculated
Coates LC, Fransen J, Helliwell PS. Defining minimal disease activity in psoriatic arthritis: a proposed objective target for treatment. Ann Rheum Dis. 2010;69(1):48-53. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.