The 1987 ACR classification criteria and the 2010 ACR/EULAR classification criteria for RA
| 1987 classification criteria (parameters) | 2010 classification criteria (parameters and points) |
|---|---|
| To be used in patients with at least one joint with definite clinical synovitis and with the synovitis not better explained by another disease | |
| Morning stiffness | Joint involvement 1 large joint=0 2–10 large joints=1 1–3 small joints=2 4–10 small joints=3 >10 small joints=5 |
| Arthritis of three or more joint areas | Serology RF and ACPA negative=0 Low positive RF or ACPA=2 High positive RF or ACPA=3 |
| Arthritis of hand joints | Acute phase reactants Normal=0 Elevated CRP or ESR=1 |
| Symmetric arthritis | Duration of symptoms <6 weeks=0 >6 weeks=1 |
| Rheumatoid nodules | |
| Serum RF | |
| Radiographic changes | |
| Criteria are fulfilled if 4 out of 7 parameters are present | Criteria are fulfilled if a patient has ≥6 points |
ACPA, anti-citrullinated peptide antibody; ACR, American College of Rheumatology; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; EULAR, European League Against Rheumatism; RA, rheumatoid arthritis; RF, rheumatoid factor.