What is the normal value for rheumatoid factor?
Disease description:
I have rheumatism and plan to go to the hospital today for a rheumatoid factor (RF) test. What is the normal reference range for rheumatoid factor?
Doctor's answer (1)
Dr. Wang Zhuo
The normal range for rheumatoid factor (RF) is generally 1.5–20 IU/mL. Variations in the normal range are often associated with advancing age and overall health status; values up to 20 IU/mL are considered within the normal range. Elevated RF levels above this normal range increase the risk of developing rheumatoid diseases, such as rheumatoid arthritis.
