Quick Facts
- Sample: Blood
- Fasting: No special preparation is required
- Turnaround: 1-2 days (may take longer based on weather, holiday, or lab delays)
What This Test Measures
This test measures rheumatoid factor (RF) levels in your blood. Rheumatoid factors are autoantibodies your immune system produces that mistakenly target healthy tissue instead of foreign invaders like viruses or bacteria. This test reports rheumatoid factor as a single measurement and does not separately identify IgA, IgG, or IgM antibody classes.
Elevated rheumatoid factor levels can be associated with rheumatoid arthritis as well as other autoimmune disorders, certain chronic infections, and certain cancers. This test measures rheumatoid factor only. It does not include anti-cyclic citrullinated peptide (anti-CCP) antibodies or inflammatory markers, and it does not evaluate inflammation directly.
Benefits
- Measures rheumatoid factor levels from a simple blood draw
- Provides information that may help evaluate autoimmune symptoms
- No special preparation or fasting required
- Fast results, typically within 1-2 days
- Convenient testing without a doctor's visit required to order
- Supports informed conversations with your healthcare provider
Who Is This Test For?
- Individuals experiencing joint pain, swelling, or stiffness
- Individuals with unexplained fatigue or low grade fever
- Individuals with muscle pain of unclear origin
- Individuals who have noticed unexplained rash or loss of appetite
- Individuals wanting rheumatoid factor information for provider discussion
- Individuals monitoring symptoms alongside other lab testing, such as the CCP Antibody Blood Test
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. What is the purpose of this arthritis test?
This test measures rheumatoid factor, an autoantibody the immune system produces that can mistakenly target healthy tissue. Measuring rheumatoid factor levels may help a healthcare provider evaluate symptoms associated with rheumatoid arthritis or other autoimmune conditions. This test evaluates an antibody response rather than inflammatory activity, and it does not diagnose rheumatoid arthritis or any other condition on its own.
2. Who would benefit from this test?
This test may be useful for individuals experiencing symptoms often associated with autoimmune conditions, such as joint pain, swelling, fatigue, fever, rash, or muscle pain. It can also be useful for individuals who want rheumatoid factor information to discuss with a healthcare provider. Not everyone with joint discomfort will need this specific test, and a healthcare provider can help determine whether it's appropriate.
3. When should I order this test?
You might consider ordering this test if you're experiencing symptoms like joint pain, swelling, stiffness, fatigue, or unexplained fever. Some individuals order it alongside other testing, such as the CCP Antibody Blood Test, as part of a broader conversation with their provider. This test provides one piece of information and does not replace a full medical evaluation.
4. How does this test differ from other arthritis tests?
This test measures rheumatoid factor specifically, reported as a single value rather than broken down by IgA, IgG, or IgM antibody classes. It's different from an anti-CCP antibody test, which looks at a separate type of antibody. It also differs from inflammatory marker tests, since rheumatoid factor is an antibody measurement and does not directly assess inflammation. These tests provide different types of information and aren't interchangeable.
5. Do I need to fast before this test?
No special preparation is required for this test.
6. How quickly will I get results?
Results are typically available within 1-2 days. Results may take longer based on weather, holidays, or lab delays.
7. How do I interpret the results?
The meaning of your rheumatoid factor result depends on your individual symptoms, medical history, and other clinical findings. Elevated rheumatoid factor levels can be associated with rheumatoid arthritis, but they can also occur with other autoimmune conditions, chronic infections, or certain cancers, so a positive result does not confirm any single diagnosis. Likewise, a negative result does not rule out rheumatoid arthritis or another condition. Rheumatoid factor results are generally interpreted alongside symptoms, physical findings, and other laboratory results when appropriate.
Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.
8. What should I do if my results are abnormal?
If your results fall outside the expected range, review them with a qualified healthcare provider. They can help interpret your results in the context of your symptoms and medical history and determine whether additional evaluation may be appropriate. This test result alone does not provide a complete clinical picture.
9. How often should I get tested?
There isn't a set testing schedule for this test. How often you should be tested depends on your individual health situation, so it's best to follow guidance from your healthcare provider as directed.
Pre test preparation
No special preparation is required for this test.
