Rheumatoid Factor (RF)
This test is used in the detection and prognosis of autoimmune disorders of the joints. Rheumatoid factors are antibodies directed against components of the immune system and the joints. The Rheumatoid factor is found to be elevated in a majority of individuals with conditions such as rheumatoid arthritis and mixed connective tissue disorders. Fasting is not required for this test. Please take all prescription medications as prescribed. Do not take supplements the morning of the blood draw.