ACR/EULAR (2009) Classification Criteria for Rheumatoid Arthritis
Symptom Duration (as reported by patient) Points
- < 6 weeks 0
- > 6 weeks 1
Joint Distribution Points
- 1 large joint 0
- 2-10 large joints 1
- 1-3 small joints (with or without involvement of large joints) 2
- 4-10 small joints (with or without involvement of large joints) 3
- > 10 joints (at least 1 small joint) 5
Serology Points
- RF- and CCP- 0
- Low RF+ or CCP+ 2
- High RF+ or CCP+ 3
Acute Phase Reactants Points
- Normal ESR or CRP 0
- Abnormal ESR or CRP 1
RF: rheumatoid factor. CCP: anti-citrullinated citric peptide. ESR: erythrocyte sedimentation rate. CRP: C-reactive protein. Low: < 3 x upper limit of normal (ULN). High: > 3 x ULN
Requirements: patients who have at least 1 swollen joint, and not better explained by another diseaseto be applied. A score ≥ 6 points is required for classification as definite RA.
Reference: Aletaha et al. 2010 Rheumatoid arthritis classification criteria: an American College of Rheumatology / European League Against Rheumatism collaborative initiative. Ann Rheum Dis 2010;69:1580-1588.