ACR/EULAR (2010) Classification Criteria for RA

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.