Which of the following are not part of the Diagnostic criteria for rheumatoid arthritis as described by the American rheumatology association.
|D||Serum Rheumatoid factor|
a. The American rheumatology association has developed 7 criteria for diagnosis of RA of the 7 presence of 4 is sufficient for diagnosis of a patient as RA.
b. The criteria are: Morning stiffness, polyarthritis of at least 3 joints of the specified areas, arthritis of hand joints, symmetric arthritis, subcutaneous nodules serum RF, radiographic changes specific to RA.