Yashoda Hospitals > Diagnostics > Rheumatoid Arthritis Factor Test

What is RA Factor Test?

RA Factor Test Stands for rheumatoid factor test, It is a blood test used to detect the presence of rheumatoid factors (RFs) in the blood. Rheumatoid factors are antibodies produced by the immune system against rheumatoid arthritis. Antibodies are specialized proteins that fight against harmful foreign substances in the body. The RA factor test is usually done along with other blood tests and imaging scans to differentiate and rule out the possibility of various autoimmune diseases. Anyone can take the test irrespective of age if they are at risk of suffering from rheumatoid arthritis. Get the RA factor test immediately if you experience joint problems like pain, tenderness, swelling, difficulty moving, fatigue, weight loss, and fever. You may experience pain and bruise at the site of needle injection. 

What is the RA Factor Test used for?

The RA factor test is used to detect the levels of rheumatoid factors in the blood sample. Rheumatoid factors are antibodies produced by the immune system that target body cells, causing autoimmune diseases like rheumatoid arthritis. By determining the presence of these special antibodies, the test helps diagnose and differentiate rheumatoid arthritis from other types of arthritis and autoimmune diseases, providing valuable information for the prognosis and management of the condition.

Understanding the RA Factor Test Results

The blood test results are given in units per millimetre (U/mL). The reference range differs based on age, gender, medical health history, and the type of lab analysis. A positive test report infers that your body has rheumatoid factors, and you may have rheumatoid arthritis. Your doctor may prescribe additional tests for confirming the diagnosis. 

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    Frequently Asked Questions

    The normal range of rheumatoid factors in the blood is less than 14 IU/mL. Any values above 14 IU/mL suggest abnormal results, and the person might have rheumatoid arthritis, internal tissue injury, and inflammation.

    The RA factor test is conducted to diagnose and monitor rheumatoid arthritis (RA). It detects the presence of RA antibodies in the blood, allowing for early detection and treatment. The test is commonly recommended for individuals with joint issues, especially those with a family history of RA, to measure their risk and manage the condition effectively.

    An expert lab technician or a doctor will insert a sterile needle into the vein of the upper arm to draw the blood sample. The blood will be analyzed for rheumatoid factors. You may feel slight pain or bruise at the site of needle insertion.

    The RA factor result will contain the numerical range of the antibodies in the blood. A positive or abnormal RA factor result indicates rheumatoid arthritis with other joint problems. A negative or normal report infers that you do not have the RF antibodies in the blood.

    A positive result for the RA factor in a blood test indicates the presence of rheumatoid arthritis. However, it can also be a false positive due to other underlying inflammation, connective tissue injury, or Sjögren's syndrome. It is best to consult a doctor for a medical opinion, proper diagnosis, and to determine the appropriate treatment plan for rheumatoid arthritis if confirmed.

    No, there are no different RA factor normal ranges for males and females. The normal range is the same for both genders, typically less than 14 IU/mL. Values above 14 IU/mL suggest abnormal results, possibly indicating rheumatoid arthritis or inflammatory disorders. Consult a healthcare professional for proper interpretation and evaluation.

    Yes, the RA factor can change from negative to positive or vice versa over time in individuals with certain autoimmune conditions like rheumatoid arthritis. Changes in RA factor status can occur due to disease progression or response to treatment. Regular monitoring and retesting are essential to track the disease's course and adjust treatment accordingly.

    A high level of rheumatoid factor refers to a value exceeding the normal range, usually above 14 IU/mL. Elevated RA levels are commonly associated with autoimmune conditions like rheumatoid arthritis or other rheumatic diseases. However, further medical evaluation is needed to ascertain the specific implications and underlying cause of elevated RF levels in an individual's case.

    A rheumatoid factor (RF) negative result is generally good, indicating a lower likelihood of having rheumatoid arthritis (RA). However, RA can still occur with negative RF results. Additional tests and clinical evaluation are needed for a proper diagnosis.

    There is no specific method to directly reduce Rheumatoid Factor (RF) levels in the blood. The focus of RA management is to control inflammation and symptoms through medications like NSAIDs, DMARDs, and biologics, along with lifestyle changes, physical therapy, and stress management. Regular medical follow-ups are important for monitoring disease progression and adjusting the treatment as needed.