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.

[1]  N. Arden,et al.  Prognostic indicators of foot‐related disability in patients with rheumatoid arthritis: Results of a prospective three‐year study , 2012, Arthritis care & research.

[2]  M. A. van de Laar,et al.  Magnetic Resonance Imaging of the Rheumatic Foot According to the RAMRIS System Is Reliable , 2011, The Journal of Rheumatology.

[3]  J. Burridge,et al.  Assessment of the natural history of forefoot bursae using ultrasonography in patients with rheumatoid arthritis: A twelve‐month investigation , 2010, Arthritis care & research.

[4]  J. Burridge,et al.  The clinical importance of ultrasound detectable forefoot bursae in rheumatoid arthritis. , 2010, Rheumatology.

[5]  Walter Grassi,et al.  What is new in ultrasound and magnetic resonance imaging for musculoskeletal disorders? , 2008, Best practice & research. Clinical rheumatology.

[6]  P. Marks,et al.  MR imaging and ultrasound of metatarsalgia--the lesser metatarsals. , 2008, Radiologic clinics of North America.

[7]  L. Bancroft,et al.  Imaging of soft tissue lesions of the foot and ankle. , 2008, Radiologic clinics of North America.

[8]  C. Pfirrmann,et al.  Fibrosis and adventitious bursae in plantar fat pad of forefoot: MR imaging findings in asymptomatic volunteers and MR imaging-histologic comparison. , 2008, Radiology.

[9]  Tore K Kvien,et al.  Reliability and sensitivity to change of the OMERACT rheumatoid arthritis magnetic resonance imaging score in a multireader, longitudinal setting. , 2005, Arthritis and rheumatism.

[10]  M. Østergaard,et al.  Magnetic resonance imaging of peripheral joints in rheumatic diseases. , 2004, Best practice & research. Clinical rheumatology.

[11]  Paul Bird,et al.  OMERACT Rheumatoid Arthritis Magnetic Resonance Imaging Studies. Core set of MRI acquisitions, joint pathology definitions, and the OMERACT RA-MRI scoring system. , 2003, The Journal of rheumatology.

[12]  Koski Jm.  Ultrasound detection of plantar bursitis of the forefoot in patients with early rheumatoid arthritis , 1998 .

[13]  J. Koski.  Ultrasound detection of plantar bursitis of the forefoot in patients with early rheumatoid arthritis. , 1998, The Journal of rheumatology.