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.

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 ...

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 ...

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 ...