Rheumatoid factor is used as a test for rheumatic immune diseases, and the normal value is 0~20IU/ml.
Under normal circumstances, the normal range of the rheumatoid factor is 0-20 IU/ml, and if the rheumatoid factor is higher than 20 IU/ml, it may be physiologically and pathologically elevated.
Physiologic factors should be considered to be a normal response to aging, while pathologic factors should be considered to be caused by rheumatoid arthritis, systemic lupus erythematosus, tuberculosis, and tuberculosis.
A rheumatoid factor below the minimum range is generally of no significance and is not indicative of any disease.
Patients with abnormal rheumatoid factor tests are advised to go to the rheumatology and immunology departments of regular hospitals for detailed consultation.