Skip to content
🐣 10% discount with code: PÅSK2026 🐣
Get 10% off your first order with code TESTM10
Registered healthcare provider – safe and secure
Wide range of MRI and blood tests
RF

Rheumatoid factor antibody immunoglobulins

Rheumatoid factor (RF)

RF is primarily associated with rheumatoid arthritis (RA) an autoimmune disease that affects the joints. In the case of RA, RF targets IgG antibodies and forms immune complexes, leading to inflammation in the joints.

RF

Rheumatoid factor (RF)

Rheumatoid arthritis test

529 kr

10% discount on testmottagningen.se with the code: PÅSK2026 Health checks for increased well-being

Go to the campaign Browse healthchecks
Trustpilot

Contents

What is Rheumatoid factor (RF)?

Rheumatoid factor (RF) is an autoantibody that is an antibody that targets the body's own proteins. In the case of RA, RF targets IgG antibodies and forms immune complexes, leading to inflammation in the joints. The formation of RF antibodies in the blood can indicate autoimmune disease, which means that the body starts to fight its own cells and its own immune system. RF can also be detected in connection with infection without always being connected with rheumatic disease and is also present in the blood of approximately 5% of completely healthy people.

Why is Rheumatoid factor analyzed?

  • Diagnosing rheumatoid arthritis (RA): A positive RF test can be one of several factors that indicate a person may have rheumatoid arthritis. It is used along with other clinical and laboratory tests to confirm the diagnosis of RA.

  • Monitoring: The RF test can be used to monitor disease activity and treatment effectiveness in people who have already been diagnosed with RA.

  • Evaluate other rheumatic diseases: RF levels can sometimes be elevated in other autoimmune diseases and rheumatic conditions even if they are not necessarily specific to RA. It can help guide doctors in the diagnosis of various diseases.

What does an elevated value of Rheumatoid factor mean?

An elevated RF value can mean the following:

  • Rheumatoid arthritis (RA): A positive RF test can support the diagnosis of RA. The higher the RF levels, the stronger the association with RA may be.

  • Other autoimmune diseases: High RF levels can also occur in other autoimmune diseases such as systemic lupus erythematosus (SLE), Sjogren's syndrome and systemic sclerosis.

  • Infections: RF levels may temporarily increase in certain infections especially chronic infections such as hepatitis C.

  • Age: Older people sometimes have higher RF levels even if they have no symptoms of the disease.

Tests containing the marker Rheumatoid factor (RF)

Antibody tests

Antibody tests

RF

Rheumatoid factor (RF)

Rheumatoid arthritis test
Marker Icon 1 marker
  • Measuring antibody levels linked to joint pain
  • blood analysis is used in the diagnosis of Rheumatoid arthritis (RA)
  • Indication for joint rheumatism

529 kr

Health checks

Health checks

Health check - Rheumatism

Health check - Rheumatism

Joint pain test
Marker Icon 9 Biomarkers
Information

Medical comment included

With us, you will always receive a doctor’s opinion from a licensed physician when you order a medical check-up that includes a medical opinion. The doctor’s opinion includes an overall assessment of your results from laboratory analysis. The opinion is individual and may vary depending on the specific tests your medical check-up includes.

What can I expect in the medical report?

The medical opinion will summarize the results of your test results to give you an assessment of your health including any abnormalities outside the reference ranges. In case of abnormalities or need, your doctor may also contact you for a free conversation to explain and talk about your results. Remember that a health check always includes specific test results based on your health and your personal circumstances. Values outside the reference range should therefore always be discussed with a doctor before any decisions regarding possible treatment are made.

What does the doctor look at during a health check?

When assessing a blood test or health check, your doctor will look at several different parameters to evaluate your health and identify any abnormalities. Below are some common aspects your doctor may examine:

Blood counts: Your doctor will check red, white and platelet counts to identify any signs of anaemia, infection or bleeding.

Nutrients and biochemical markers: Includes, for example, analysis and monitoring of blood sugar (glucose) levels, electrolyte levels (e.g. sodium, potassium), liver function tests (e.g. liver enzymes), kidney function tests (e.g. creatinine, urea) and lipid profile (e.g. cholesterol, triglycerides). The results of the tests give your doctor a better idea of your organ function, blood sugar level, cholesterol conditions and other important health aspects.

Inflammatory markers: Your doctor may measure health markers such as C-reactive protein (CRP) or red blood cell decrease rate (SR) to evaluate inflammatory conditions or confirm an active infection.

Hormone levels: Your doctor may monitor your hormone levels to assess hormonal imbalances or diseases, such as thyroid hormones (TSH, T3, T4), sex hormones or other specific hormones such as testosterone levels.

Specific tests: Depending on your goal of your health check or medical history, your doctor may look into specific tests to investigate conditions or diseases, such as diabetes, vitamin deficiency or autoimmune diseases.

In conclusion, the doctor weighs all test results based on the health check to assess your overall health, detect any abnormalities and identify possible underlying medical conditions.

What happens if I have abnormal test results?

If your blood count is abnormal, this will be addressed in your personal medical opinion. Depending on the nature and extent of the abnormality, your doctor may also contact you directly through the test result service for further guidance. Various measures and advice will be provided based on the specific abnormalities observed along with your medical history.

  • Measuring antibody levels linked to joint pain
  • Indication for joint rheumatism
  • Analyzes blood status and inflammation values
  • The analysis is used in the diagnosis of rheumatoid arthritis

995 kr

Inflammation

Inflammation

RF

Rheumatoid factor (RF)

Rheumatoid arthritis test
Marker Icon 1 marker
  • Measuring antibody levels linked to joint pain
  • blood analysis is used in the diagnosis of Rheumatoid arthritis (RA)
  • Indication for joint rheumatism

529 kr

Cart

The basket is empty.

Hos oss får du tillgång till Sveriges bredaste utbud av blodprov, hälsokontroller och MR – med läkare som alltid granskar dina provsvar.

Select tests
Sampling fee
Total
Sampling fee?

The sample collection fee is a fixed cost that refers to the visit to the clinic where you submit your sample. The fee is not affected by how many tests you have ordered, but varies depending on the order value:

Free sampling fee

For purchases over 1 000 SEK, the sampling fee is included.