Rheumatoid Factor: price and preparation | IntroLab Belgrade
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Rheumatoid Factor

Price800 RSD
Result in1 day
SampleVenous Blood
PreparationNot required
Rheumatoid Factor test, IntroLab laboratory Belgrade Written byDr. Igor Švonja, MD

Published: Updated:

The Rheumatoid Factor (RF) test, available at the IntroLab in Belgrade, is essential for diagnosing various immunological disorders, particularly rheumatic diseases. With its modern approach and highly trained team, IntroLab ensures accurate and reliable results, demonstrating a strong commitment to excellence and quality healthcare services.

What is Rheumatoid Factor?

Rheumatoid Factor is an autoantibody, a protein that the body produces in response to infection or inflammation, and it can also be associated with certain autoimmune diseases. Elevated levels can indicate various pathological conditions, primarily rheumatoid arthritis, but also other diseases such as lupus, Sjögren’s syndrome, hepatitis, and more.

Why is measuring Rheumatoid Factor important?

Measuring Rheumatoid Factor levels in the blood is crucial for diagnosing, treating, and monitoring rheumatoid arthritis. This test helps doctors identify whether an inflammatory process is present in the body and guides them in planning further treatment based on the results. The Rheumatoid Factor test is recommended for individuals who exhibit symptoms such as:

  • joint pain
  • swelling
  • stiffness

This test can also be used to monitor the effectiveness of treatment and the progression of the disease.

How are the results interpreted?

A normal Rheumatoid Factor result is below 14 IU/mL. Results above this level may suggest the presence of a rheumatic disease, but they do not necessarily indicate illness. Elevated levels can also be found in individuals who do not have rheumatoid arthritis, as well as in older adults. It is important to interpret these results in the context of other symptoms and laboratory findings.

How is the test performed?

The Rheumatoid Factor test is a simple procedure that requires only a small blood sample drawn from a vein. After the sample is collected, it is sent to a laboratory where a specialized technique is used to measure the level of Rheumatoid Factor.

Subtypes of Rheumatoid Factor tests

Testing can be performed in several ways, depending on the patient’s specific needs and the doctor’s recommendations. The main subtypes of these tests include:

  • Rheumatoid Factor (RF) Test: This is the most common test used to detect RF antibodies in the blood.
  • Anti-CCP (Anti-Cyclic Citrullinated Peptide) Test: The Anti-CCP test is used to diagnose rheumatoid arthritis and can often detect the disease even before symptoms appear.
  • Antinuclear Antibody (ANA) Test: The ANA test is used to diagnose various autoimmune disorders, including lupus and Sjögren’s syndrome, which can also result in elevated Rheumatoid Factor levels.

These test subtypes enable doctors to accurately diagnose and treat rheumatoid arthritis and other autoimmune diseases. Based on the results, doctors can determine the most effective treatment for each patient.

Sample and preparation: Rheumatoid Factor

Sample
Venous Blood
Sampling
Blood Draw
Result in
1 day
Preparation
No special preparation is required.
Category
Immunology

Frequently asked questions

How much does a rheumatoid factor test cost and how is it done?

The Rheumatoid Factor (RF) test at IntroLab in Belgrade costs 800 RSD, and the result is ready in 1 day. Only a small amount of venous blood is needed. When rheumatoid arthritis is suspected, doctors often order CCP antibodies (1,800 RSD) along with rheumatoid factor, and when lupus or Sjögren’s syndrome is suspected, the ANA HEp-2 test (1,900 RSD), so everything can be done from the same blood draw.

What does a positive rheumatoid factor mean?

A positive, or elevated, rheumatoid factor means there is more of this autoantibody in the blood than usual. It is most often associated with rheumatoid arthritis, but it also occurs in lupus, Sjögren’s syndrome, hepatitis and other inflammatory conditions. Some people without rheumatoid arthritis, especially older adults, also have an elevated rheumatoid factor. That is why Rheumatoid Factor results from IntroLab laboratory are interpreted by a doctor, together with symptoms and other tests.

Does a negative rheumatoid factor rule out rheumatoid arthritis?

Not necessarily. A negative rheumatoid factor lowers the likelihood of rheumatoid arthritis but does not rule it out, because some patients do not have an elevated rheumatoid factor, especially early in the disease. That is why, with joint pain, swelling and stiffness, doctors often also order the anti-CCP test, which can detect rheumatoid arthritis even before symptoms appear. At IntroLab laboratory, both tests are done on venous blood.

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