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Test Description
The rheumatoid factor test or RF Test for short, measures the level of autoantibodies in the blood that target the Fc portion of immunoglobulin G (IgG). These antibodies, known as rheumatoid factors, are associated with autoimmune conditions, particularly rheumatoid arthritis, but can also be present in other diseases and some healthy individuals.
Indications of the Test
The test is used to help diagnose rheumatoid arthritis and other autoimmune conditions, such as Sjögren syndrome, systemic lupus erythematosus, and certain infections like hepatitis C and chronic viral infections. It is also employed to assess disease activity and prognosis in rheumatoid arthritis.
Patient Preparation/Instructions
No special preparation is usually necessary for the RF test. However, it’s important to discuss the results with a doctor trained in autoimmune and arthritis conditions, such as a rheumatologist, and ask any relevant questions.
Typical Reference Values
The typical reference values for rheumatoid factor can vary between laboratories. In general, a higher level of rheumatoid factor in the blood is associated with a greater likelihood of having rheumatoid arthritis or another autoimmune condition. However, it’s important to note that some people with these conditions have normal levels of rheumatoid factor, and some healthy individuals, especially the elderly, may have positive rheumatoid factor tests.
Turnaround Time
The turnaround time for the RF test can vary depending on the testing facility. Typically, results are available within a few days.
Order This Test
To order the rheumatoid factor test, click the “Order Test” button and add it to your cart. After completing the order, a blood sample will be collected at a doctor’s office, hospital, or laboratory for analysis.
