A rheumatoid factor (RF) blood test measures the amount of the RF antibody in your blood. The RF antibody can attach to normal body tissue, causing damage.
A high RF level can be caused by several autoimmune diseases, including rheumatoid arthritis, and some infections. Sometimes an elevated level of RF is present in healthy people.
A test for rheumatoid factor is done to help support a diagnosis of rheumatoid arthritis.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse call line if you are having problems. It's also a good idea to keep a list of the medicines you take. Ask your doctor when you can expect to have your test results.
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Current as of: October 31, 2016
Adam Husney, MD - Family Medicine
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