What Is the Rheumatoid Factor Test? A rheumatoid factor test, or RF test, is a blood test to look for rheumatoid factors in your blood. High levels of rheumatoid factor can show up in people with ...
Diagnosing rheumatoid arthritis involves a comprehensive approach, as there isn’t a single definitive test. Instead, doctors use a combination of blood tests, physical assessments, joint scans, and ...
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