The reliability of a novel magnetic resonance imaging-based tool for the evaluation of forefoot bursae in patients with rheumatoid arthritis: the FFB score.
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.
['Cherry|Lindsey|L|', 'King|Leonard|L|', 'Thomas|Matthew|M|', 'Roemer|Frank|F|', 'Culliford|David|D|', 'Bowen|Catherine J|CJ|', 'Arden|Nigel K|NK|', 'Edwards|Christopher J|CJ|']
D000293:Adolescent D000328:Adult D000368:Aged D000369:Aged, 80 and over D001172:Arthritis, Rheumatoid D002061:Bursa, Synovial D003430:Cross-Sectional Studies D018450:Disease Progression D005260:Female D005500:Follow-Up Studies D005545:Forefoot, Human D006801:Humans D008279:Magnetic Resonance Imaging D008297:Male D008875:Middle Aged D015203:Reproducibility of Results D012720:Severity of Illness Index D055815:Young Adult
rheumatoid arthritis disease activity foot inflammation magnetic resonance imaging outcome measures radiology synovium