The Rheumatoid factor (RA factor) looks at an antibody found in many people with rheumatoid arthritis. It is done for: joint pain and swelling.
General health information, not a diagnosis. In an emergency, call 102. Always consult a qualified health professional.
The Rheumatoid factor (RA factor) looks at an antibody found in many people with rheumatoid arthritis. It is done for: joint pain and swelling. Why it is done: Joint pain and swelling. generated by SI from cited sources · general information, not a diagnosis · consult a health professional
Sources: SI health summary (own words); MedlinePlus Lab Tests and CDC as references
Joint pain and swelling.
No fasting needed. Laboratory-specific; see the reference range on your report. High or positive may mean: Supports rheumatoid arthritis with symptoms; also positive in other conditions. Low or negative may mean: Does not rule out rheumatoid arthritis. General information, not a diagnosis. Results must be interpreted by a qualified health worker.
An antibody found in many people with rheumatoid arthritis.
Blood
Supports rheumatoid arthritis with symptoms; also positive in other conditions.
Does not rule out rheumatoid arthritis.
Reference ranges vary by lab, age and sex — always use the range printed on your own report.
Consult a doctor to interpret results — a single test does not make a diagnosis.
Uses your location once to list the nearest facilities. Nothing is stored.
What does the Rheumatoid factor (RA factor) measure?
An antibody found in many people with rheumatoid arthritis.
Why is the Rheumatoid factor (RA factor) done?
Joint pain and swelling.
Do I need to fast for the Rheumatoid factor (RA factor)?
No fasting needed.
What does a high or positive Rheumatoid factor (RA factor) mean?
Supports rheumatoid arthritis with symptoms; also positive in other conditions.
What does a low or negative Rheumatoid factor (RA factor) mean?
Does not rule out rheumatoid arthritis.
What is the normal range for the Rheumatoid factor (RA factor)?
Laboratory-specific; see the reference range on your report.
Why is Rheumatoid factor (RA factor) done?
Joint pain and swelling.
Do I need to prepare or fast for Rheumatoid factor (RA factor)?
No fasting needed. Laboratory-specific; see the reference range on your report. High or positive may mean: Supports rheumatoid arthritis with symptoms; also positive in other conditions. Low or negative may mean: Does not rule out rheumatoid arthritis. General information, not a diagnosis. Results must be interpreted by a qualified health worker.
SI text CC BY 4.0; decoder reference data (cited per range); LOINC codes free with attribution (notice included).
Sources: SI health summary (own words); MedlinePlus Lab Tests and CDC as references