Print By Mayo Clinic Staff Request an appointment About Aug. 26, 2023 Print Show references Firestein GS, et al. Autoantibodies in rheumatoid arthritis. In: Firestein & Kelley's Textbook of Rheumatology. 11th ed. Elsevier; 2021. https://www.clinicalkey.com. Accessed March 22, 2023. Rheumatoid factor (RF) test. Testing.com. https://www.testing.com/tests/rheumatoid-factor-rf/. Accessed March 22, 2023. Shmerling RH, et al. Rheumatoid factor: Biology and utility of measurement. https://www.uptodate.com/contents/search. Accessed March 22, 2023. Ferri FF. Rheumatoid arthritis. In: Ferri's Clinical Advisor 2023. Elsevier; 2023. https://www.clinicalkey.com. Accessed March 22, 2023. Related Juvenile idiopathic arthritis Psoriatic arthritis Rheumatoid arthritis News from Mayo Clinic Mayo Clinic Q & A: What to expect during a blood draw April 29, 2024, 12:46 p.m. CDT Products & Services A Book: Mayo Clinic Family Health Book A Book: Mayo Clinic Guide to Arthritis Newsletter: Mayo Clinic Health Letter — Digital Edition Show more products and services from Mayo Clinic Rheumatoid factorAbout PRC-20198136 Patient Care & Health Information Tests & Procedures Rheumatoid factor