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OBJECTIVE: The aim of this study was to determine the reliability of an MRI-based score that evaluates forefoot bursae (FFBs) in patients with RA. METHODS: Items for inclusion, grading criteria and MRI sequences were determined iteratively. The score was evaluated in 30 patients with established RA. Reader agreement was evaluated using the percentage of exact/close agreement, Bland-Altman plots, kappa and intraclass correlation coefficient analyses. RESULTS: The FFB score assesses nine forefoot regions and contains four items: presence, shape, enhancement and magnetic resonance characteristics. The FFB score showed moderate to good intra- and interreader agreement (κ range = 0.5-0.9 and 0.47-0.87, respectively). CONCLUSION: The FFB score is adequately reliable in the evaluation of bursa-like lesions of the forefoot in patients with RA.

Original publication




Journal article


Rheumatology (oxford)

Publication Date





2014 - 2017


disease activity, foot, inflammation, magnetic resonance imaging, outcome measures, radiology, rheumatoid arthritis, synovium, Adolescent, Adult, Aged, Aged, 80 and over, Arthritis, Rheumatoid, Bursa, Synovial, Cross-Sectional Studies, Disease Progression, Female, Follow-Up Studies, Forefoot, Human, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Reproducibility of Results, Severity of Illness Index, Young Adult