Two autoantibodies, rheumatoid factor (RF) and anti-citrullinated protein antibodies (ACPA), compete for your attention in assessing the severity of rheumatoid arthritis. In this video from the American College of Rheumatology annual meeting , Dr. Josef Smolen describes the study in which they addressed the impact of ACPA on the need to assess RF.
You can read details of the study online. It's Abstract #421 in the ACR Abstract Supplement.
