Rheumatoid Factor (RF) - Normal Value
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When you have joint pain and fatigue that might be suspected caused by rheumatoid arthritis (RA), your health provider may order rheumatoid factor test.
Test Sample
A blood sample from arm vein.
Test Preparation
None.
Test Results
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.
The RF test must be interpreted in conjunction with a person’s symptoms and clinical history.
These tests are usually conducted along with RF test to help pinpoint a diagnosis of rheumatoid arthritis.
- Anti-nuclear antibody (ANA)
- Anti-cyclic citrullinated peptide (anti-CCP) antibodies
- C-reactive protein (CRP)
- Erythrocyte sedimentation rate (ESR, or sed rate)
* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
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