2010 Rheumatoid Arthritis Classification Criteria for Rheumatoid Arthritis Score Target population (who should be tested?): patients who  1) have at least one joint with definite clinical synovitis (swelling)*  2) with the synovitis not better explained by another disease† Classification criteria for RA (score-based algorithm: add score of categories A–D a score of ≥6/10 is needed…