What score classifies definite RA?

A score of ≥6 out of 10 classifies definite RA per 2010 ACR/EULAR criteria. Domains include joint involvement (0-5), serology (0-3), acute-phase reactants (0-1), and symptom duration (0-1).

Does the 2010 criteria require erosions?

No. The 2010 criteria were designed for early RA classification before erosions develop. A patient with synovitis not explained by another diagnosis with score ≥6 qualifies as definite RA.

What is 'high positive' serology in the criteria?

High positive anti-CCP or RF = >3× upper limit of normal (ULN). High positive serology scores 3 points. Low positive = >ULN to 3×ULN, scoring 2 points.

ACR/EULAR 2010 RA Classification Criteria

Apply the 2010 ACR/EULAR classification criteria for rheumatoid arthritis. A score ≥6/10 classifies definite RA. Incorporates joint involvement, serology, acute-phase reactants, and duration of symptoms.

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