RT Journal Article
SR Electronic
T1 Role of erosions typical of rheumatoid arthritis in the 2010 ACR/EULAR rheumatoid arthritis classification criteria: results from a very early arthritis cohort
JF Annals of the Rheumatic Diseases
JO Ann Rheum Dis
FD BMJ Publishing Group Ltd and European League Against Rheumatism
SP 1911
OP 1914
DO 10.1136/annrheumdis-2017-211350
VO 76
IS 11
A1 Brinkmann, Gina Hetland
A1 Norli, Ellen S
A1 Bøyesen, Pernille
A1 van der Heijde, Désirée
A1 Grøvle, Lars
A1 Haugen, Anne J
A1 Nygaard, Halvor
A1 Bjørneboe, Olav
A1 Thunem, Cathrine
A1 Kvien, Tore K
A1 Mjaavatten, Maria D
A1 Lie, Elisabeth
YR 2017
UL http://ard.bmj.com/content/76/11/1911.abstract
AB Objective To determine how the European League Against Rheumatism (EULAR) definition of erosive disease (erosion criterion) contributes to the number of patients classified as rheumatoid arthritis (RA) according to the 2010 American College of Rheumatology/EULAR RA classification criteria (2010 RA criteria) in an early arthritis cohort.Methods Patients from the observational study Norwegian Very Early Arthritis Clinic with joint swelling ≤16 weeks, a clinical diagnosis of RA or undifferentiated arthritis, and radiographs of hands and feet were included. Erosive disease was defined according to the EULAR definition accompanying the 2010 RA criteria. We calculated the additional number of patients being classified as RA based on the erosion criteria at baseline and during follow-up.Results Of the 289 included patients, 120 (41.5%) fulfilled the 2010 RA criteria, whereas 15 (5.2%) fulfilled only the erosion criterion at baseline. 118 patients had radiographic follow-up at 2 years, of whom 6.8% fulfilled the 2010 RA criteria and only one patient fulfilled solely the erosion criterion during follow-up.Conclusion Few patients with early arthritis were classified as RA based on solely the erosion criteria, and of those who did almost all did so at baseline.