The rheumatoid factor (RF) test is primarily used to help diagnose rheumatoid arthritis (RA) and to help distinguish RA from other forms of arthritis or other conditions that cause similar symptoms.
The test for RF may be ordered when a person has signs and symptoms of RA (rheumatoid arthritis). Symptoms may include pain, warmth, swelling, and morning stiffness in the joints.
| Reference Range* | Interpretation |
| Below 15 IU/ml | Non-reactive |
*Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
None
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