Rheumatoid Arthritis Classification Criteria | Medical Algorithm

Are you evaluating a newly presenting patient with at least 1 joint showing definite synovitis?

Yes

Is there another diagnosis (gout, SLE, psoriasis, etc) that can explain the findings better?

Yes

Duration of joint-related signs and symptoms

weeks

Number of large joints involved (shoulders, elbows,hips, knees, ankles)

Number of small joints involved

Number of other joints involved

Is the C-reactive protein concentration elevated?

Yes

Is the ESR elevated?

Yes

Select an appropriate answer for each test

Rheumatoid factors

Anti-citrullinated protein antibody

Classification Criteria for Rheumatoid Arthritis