Test Description: Rheumatoid Factor (RA Factor) – Quantitative

The Rheumatoid Factor (RA Factor) test measures the concentration of rheumatoid factor antibodies in the blood. These antibodies are often present in individuals with rheumatoid arthritis (RA), an autoimmune disorder where the immune system attacks the joints. The quantitative RA factor test provides a specific measurement of these antibodies, which can help in diagnosing RA or assessing its severity. While elevated levels of RA factor are commonly associated with RA, they can also be present in other conditions, such as lupus or chronic infections. A positive result is typically followed by additional tests and clinical evaluation to confirm the diagnosis.