PT  - JOURNAL ARTICLE
AU  - Anne Boel
AU  - Anna Molto
AU  - Désirée van der Heijde
AU  - Adrian Ciurea
AU  - Maxime Dougados
AU  - Lianne S Gensler
AU  - Maria-José Santos
AU  - Eugenio De Miguel
AU  - Denis Poddubnyy
AU  - Martin Rudwaleit
AU  - Astrid van Tubergen
AU  - Floris A van Gaalen
AU  - Sofia Ramiro
TI  - Do patients with axial spondyloarthritis with radiographic sacroiliitis fulfil both the modified New York criteria and the ASAS axial spondyloarthritis criteria? Results from eight cohorts
AID  - 10.1136/annrheumdis-2019-215707
DP  - 2019 Nov 01
TA  - Annals of the Rheumatic Diseases
PG  - 1545--1549
VI  - 78
IP  - 11
4099  - http://ard.bmj.com/content/78/11/1545.short
4100  - http://ard.bmj.com/content/78/11/1545.full
SO  - Ann Rheum Dis2019 Nov 01; 78
AB  - Background Patients with spondyloarthritis with radiographic sacroiliitis are traditionally classified according to the modified New York (mNY) criteria as ankylosing spondylitis (AS) and more recently according to the Assessment of SpondyloArthritis international Society (ASAS) criteria as radiographic axial spondyloarthritis (r-axSpA).Objective To investigate the agreement between the mNY criteria for AS and the ASAS criteria for r-axSpA and reasons for disagreement.Methods Patients with back pain ≥3 months diagnosed as axSpA with radiographic sacroiliitis (mNY radiographic criterion) were selected from eight cohorts (ASAS, Esperanza, GESPIC, OASIS, Reuma.pt, SCQM, SPACE, UCSF). Subsequently, we calculated the percentage of patients who fulfilled the ASAS r-axSpA criteria within the group of patients who fulfilled the mNY criteria and vice versa in six cohorts with complete information.Results Of the 3882 patients fulfilling the mNY criteria, 93% also fulfilled the ASAS r-axSpA criteria. Inversely, of the 3434 patients fulfilling the ASAS r-axSpA criteria, 96% also fulfilled the mNY criteria. The main cause for discrepancy between the two criteria sets was the reported age at onset of back pain.Conclusion Almost all patients with axSpA with radiographic sacroiliitis fulfil both ASAS and mNY criteria, which supports the interchangeable use of the terms AS and r-axSpA.