Though believed to be a disease of the general population, Rheumatoid arthritis affects women more than men. The cause for this occurrence is not well understood.

Rheumatoid arthritis can affect persons of all ages, but it usually appears between 25 to 50 years of age.

Rheumatoid arthritis can sometimes also affect children. “Juvenile Rheumatoid Arthritis” is the term used when it occurs in children.