FRI0066 The Clinical and Ultrasonographic Presentation of Seronegative RA is More Severe Compared to Seropositive RA in an Inception Cohort of Dmard-Naïve Patients Classified According to the 2010 ACR/Eular Criteria

BackgroundThe development of the 2010 classification criteria for rheumatoid arthritis (RA) has led to a redefinition of the patient population, including classification of seropositive vs. seronegative patients. Studies have yielded conflicting results on whether seropositive and seronegative RA are different disease entities.ObjectivesOur aim was to compare the disease characteristics of seropositive and seronegative DMARD-naïve early RA patients classified according to the 2010 ACR/EULAR criteria.MethodsRA patients who fulfilled the 2010 ACR/EULAR classification criteria were recruited at 11 rheumatology centers between 2010 and 2013. All patients had symptom duration (from first swollen joint)