Rheumatoid Factor, Serum
General · Blood
Available in:Hisar
Available at 1 lab
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₹450₹399
About this test
What is Rheumatoid Factor (RF) Test?
The RF test measures the presence of rheumatoid factor antibodies in the blood. Rheumatoid factor is an auto‑antibody that can form immune complexes and contribute to inflammation.
Key Parameter
| Parameter | What it shows |
|---|---|
| Rheumatoid Factor (RF) level | Indicates presence and quantity of RF antibodies |
Why is this test done?
- To help evaluate joint pain, swelling, or stiffness that may suggest rheumatoid arthritis (RA).
- To monitor disease activity in patients already diagnosed with RA.
- To rule out RA when other autoimmune or infectious conditions are suspected.
- As part of a broader work‑up for unexplained chronic inflammation.
Early Detection
The test can help identify signs of rheumatoid arthritis and other autoimmune disorders, but it does not diagnose on its own. A doctor interprets the result together with symptoms, history, and other tests.
Interpretation of Results
- High RF: Often seen in RA, Sjögren’s syndrome, systemic lupus erythematosus, and some chronic infections. However, many healthy people can have a high RF, especially older adults.
- Low or Normal RF: Does not rule out RA; some patients with RA have a negative RF.
- Results can be influenced by hydration, medications (e.g., steroids), infections, and other health conditions.
Who Should Consider the Test?
- Adults with persistent joint pain, swelling, or morning stiffness.
- Individuals with a family history of autoimmune disease.
- Patients undergoing evaluation for chronic inflammatory conditions.
Summary: The RF test measures rheumatoid factor antibodies to aid in diagnosing and monitoring rheumatoid arthritis and related autoimmune disorders.
Used for detecting / monitoring
Before your test
Preparation
- Fasting: No fasting required for RF.
- Combined Tests: If you are also having a fasting test (e.g., fasting glucose), follow the fasting instructions for that test.
- Procedure: A healthcare professional will draw a small amount of blood (usually 5–10 mL) from a vein in your arm using a needle. The process takes about 5 minutes.
- Discomfort: You may feel a brief pinch or sting when the needle is inserted. The sample is collected into a tube and sent to the lab.
- Precautions: No special precautions are needed. Avoid heavy alcohol or strenuous exercise 24 hours before if you are also having other tests that require it.
- Note: Confirm any specific preparation with your doctor or the lab. This information is general educational material and not a substitute for professional medical advice.
Sample type: Blood
Report parameter guide
Rheumatoid Factor
An antibody that targets the body’s own tissues, often found in people with rheumatoid arthritis and other autoimmune conditions
Low: A low or negative result generally indicates a lower likelihood of rheumatoid arthritis or other autoimmune diseases
High: A high result may indicate rheumatoid arthritis, other autoimmune disorders, chronic infections, or certain cancers