Is 10 IU mL rheumatoid factor normal?

Most medical centers consider the normal range of rheumatoid factor to be up to 10 IU/mL or 20 IU/mL, says rheumatologist Steffan Schulz, MD, assistant professor of clinical medicine with Penn Medicine in Philadelphia.

What is RA factor normal range?

The RA factor normal range is below 14 IU/ml for the Rheumatoid factor. Any values about 14IU/ml or above are considered high.

What is high level of rheumatoid factor?

A positive rheumatoid factor test result indicates that a high level of rheumatoid factor was detected in your blood. A higher level of rheumatoid factor in your blood is closely associated with autoimmune disease, particularly rheumatoid arthritis.

What is iu/mL in blood test?

International units per liter (IU/L). International units per milliliter (IU/mL). Micrograms (mcg).

Is rheumatoid factor 11 high?

Normal Rheumatoid Factor Levels Always talk with your doctor to learn more about your test results. The normal range of rheumatoid factor levels is usually between < 14 and < 20 IU/mL. A level above these values is considered a positive result and may indicate rheumatoid arthritis or other disorders [9, 10, 11].

Is rheumatoid factor 13 IU ml normal?

The normal range of RF is from 0-20 IU/ml. RF above 20 IU/ml is not considered enough to diagnose RA, as there other reasons the RF level may be elevated.

What is a good rheumatoid factor?

What are the normal ranges for rheumatoid factor? The “normal” range (or negative test result) for rheumatoid factor is less than 14 IU/ml. Any result with values 14 IU/ml or above is considered abnormally high, elevated, or positive.

What is the difference between IU mL and U mL?

U is the international unit of enzyme activity.It is 1 micromole of substrate or product transformed/min. But IU is international units which represents the amount of biological agents(vitamins,vaccines) in different preparations producing the same biological effect.

Is Rheumatoid factor 13 IU ml normal?

Is rheumatoid factor 14 bad?

The normal range of rheumatoid factor levels is usually between < 14 and < 20 IU/mL. A level above these values is considered a positive result and may indicate rheumatoid arthritis or other disorders [9, 10, 11].

What causes elevated rheumatoid factor?

But a number of other diseases and conditions can raise rheumatoid factor levels, including: Cancer. Chronic infections. Inflammatory lung diseases, such as sarcoidosis. Mixed connective tissue disease.

What is the normal range for rheumatoid factor?

The “normal” range (or negative test result) for rheumatoid factor is less than 14 IU/ml. Any result with values 14 IU/ml or above is considered abnormally high, elevated, or positive. What do high rheumatoid levels mean?

What is considered a high rheumatoid factor?

Generally, a rheumatoid factor higher than 23 units or a titer higher than 1:80 indicates the presence of rheumatoid arthritis. The Arthritis Foundation defines rheumatoid arthritis as a chronic disease in which inflammation of the joints leads to long-term damage that may result in chronic pain, loss of function, and disability.

What does an elevated rheumatoid factor mean?

Rheumatoid factor is an autoantibody, a protein made by your immune system that mistakenly attacks your own healthy tissue, usually when inflammatory or autoimmune processes are occurring. High levels of RF in your blood indicate that you may have an autoimmune disease such as RA or Sjögren’s syndrome.