The Disease Activity Score and the EULAR response criteria.

In rheumatoid arthritis (RA), inflammatory activity cannot be measured using one single variable. For this reason the Disease Activity Score (DAS). has been developed. The DAS is a clinical index of RA disease activity that combines information from swollen joints, tender joints, the acute phase response and general health. The DAS-based European League Against Rheumatism (EULAR) response criteria were developed to measure individual response in clinical trials. The EULAR response criteria classify individual patients as non-, moderate, or good responders, dependent on the extent of change and the level of disease activity reached.