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International Journal of Rheumatology
Volume 2017 (2017), Article ID 3143069, 5 pages
Research Article

Interobserver Agreement in Magnetic Resonance of the Sacroiliac Joints in Patients with Spondyloarthritis

1Department of Rheumatology, Universidad de La Sabana-Hospital Militar Central, Chía, Colombia
2Department of Radiology, Universidad Nacional de Colombia, Bogotá, Colombia

Correspondence should be addressed to John Londono

Received 19 August 2016; Revised 16 December 2016; Accepted 20 December 2016; Published 13 February 2017

Academic Editor: Bruce M. Rothschild

Copyright © 2017 Juan C. Rueda et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Background. Clinical, laboratory, and radiologic parameters are used for diagnosis and classification of spondyloarthritis (SpA). Magnetic resonance imaging (MRI) of sacroiliac (SI) joints is being increasingly used to detect early sacroiliitis. We decided to evaluate the interobserver agreement in MRI findings of SI joints of SpA patients between a local radiologist, a rheumatologist, and an expert radiologist in musculoskeletal diseases. Methods. 66 MRI images of the SI joints of patients with established diagnosis of SpA were evaluated. Agreement was expressed in Cohen’s kappa. Results. Interobserver agreement between a local radiologist and an expert radiologist was fair (). Only acute findings showed a moderate agreement (), while chronic findings revealed 76.5% of disagreement (). A fair agreement was observed in acute findings () as well as chronic findings () between a local radiologist and a rheumatologist. There was a substantial agreement between an expert radiologist and a rheumatologist (). In acute findings, a 100% agreement was achieved. Also chronic and acute plus chronic findings showed high levels of agreement and 0.62, resp.). Conclusions. Our study shows that rheumatologists may have similar MRI interpretations of SI joints in SpA patients as an expert radiologist.