Response criteria for rheumatoid arthritis in clinical practice - how useful are they?
Objective: To compare the performance of the American College of Rheumatology (ACR), European League Against Rheumatism (EULAR), and simple disease activity index (SDAI) response criteria for rheumatoid arthritis at the individual level in an observational cohort. Methods: 184 outpatients were followed using a structured protocol. For each patient, the responses according to ACR 20% and 50%, EULAR