A. The 1987 ACR criteria |
1) Morning joint stiffness > 1 hour 2) Arthritis ≥ 3 joints 3) Hand arthritis 4) Symmetric arthritis 5) Rheumatoid nodules 6) Serum rheumatoid factor positive 7) Typical radiological changes (erosion and/or demineralization in band) to the hands |
B. The criteria modified by Liao are three in number |
ACR + Anti-CCP Criteria (ACPA) ACR Criteria without nodules + Anti-CCP (ACPA) ACR Criteria without nodules or erosions + Anti-CCP (ACPA) |