Men and women with raised levels of an antibody known as rheumatoid factor in their blood have up to a 26-fold greater long term risk of developing rheumatoid arthritis, finds a study published on bmj ...

When persistent joint pain strikes, the search for answers often leads to a crucial diagnostic tool: the rheumatoid factor test. This relatively quick blood analysis serves as a window into the immune ...

More than 18 million people worldwide suffer from rheumatoid arthritis, including nearly 1.5 million Americans.

September 7, 2012 — Elevated rheumatoid factor (RF) levels in healthy patients may be a strong predictor of future rheumatoid arthritis (RA), according to data from a prospective cohort study ...

The potential for IgM cross-reactivity with rheumatoid factor–positive serum samples was observed in blood tests used to detect IgM SARS-CoV-2 by means of gold immunochromatographic and enzyme-linked ...

Quitting or avoiding smoking could prevent about one-in-six of rheumatoid arthritis cases that occur in African-Americans, new study findings suggest. U.S. researchers have linked smoking with the ...

This press release is also available in Swedish. Rheumatoid arthritis (RA), like many chronic diseases of the immune system, likely results from a combination of genetic susceptibility and ...