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Diagnosis ofRheumatoid arthritis. Postedby Dr. Badsha

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Target population (Who should be tested?): Patients who

1) have at least 1 joint with definite clinical synovitis (swelling)*

2) with the synovitis not better explained by another disease†

Classification criteria for RA (score-based algorithm: add score of categories A–D;

a score of atleast 6 out of10 is needed (6/10 is needed for classification of a patient as having definite RA)

A. Joint involvement§

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

B. Serology (at least 1 test result is needed for classification)††

Negative RF= 0

Low-positive RF = 2

High-positive RF= 3

C. Acute-phase reactants (at least 1 test result is needed for classification)‡‡

Normal CRP =0

Abnormal CRP =1

D. Duration of symptoms



< 6 weeks = 0

>6 weeks =1

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This web site is run by an Arthritis Specialist based in Dubai, United Arab Emirates. On this site you will find news about the latest in arthritis, information about research results in the field, tips and information and diet and exercise, and much more.

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