Application of the 2010 ACR/EULAR classification criteria in patients with very early inflammatory arthritis: analysis of sensitivity, specificity and predictive values in the SAVE study cohort.

Objective: Performance of the 2010 American College of Rheumatology (ACR)/European League Against Rheumatism (EULAR) rheumatoid arthritis (RA) criteria was analysed in an internationally recruited early arthritis cohort (≤16 weeks symptom duration) enrolled in the 'Stop-Arthritis-Very-Early' trial. This sample includes patients with a variety of diseases diagnosed during follow-up.

Methods: Two endpoints were defined: Investigators' diagnosis and disease-modifying antirheumatic drug (DMARD) treatment start during the 12-month follow-up.