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Inter- and intra-observer reliability of contrast-enhanced magnetic resonance imaging parameters in children with suspected juvenile idiopathic arthritis of the hip

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A Correction to this article was published on 17 October 2018

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Abstract

Background

Previous work at our institution demonstrated discrepancies between radiologists in interpretation of contrast-enhanced magnetic resonance imaging (MRI) in suspected hip arthritis.

Objective

To assess inter- and intra-observer reliability of selected MRI parameters (effusion, marrow oedema and synovial thickness and enhancement) used in the diagnosis of juvenile idiopathic arthritis.

Materials and methods

A retrospective cohort study was conducted of patients with confirmed or suspected juvenile idiopathic arthritis who underwent hip contrast-enhanced MRI between January 2011 and September 2014. Three pediatric musculoskeletal radiologists independently assessed all scans for effusion, marrow oedema, measurement of synovial thickness, synovial enhancement and subjective assessment of synovium. Categorical variables were analysed using the Cohen κ, and measurement using Bland-Altman plots.

Results

Eighty patients were included. Interobserver reliability was moderate for effusion (κ=0.5–0.7), marrow oedema (κ=0.6), subjective synovial assessment (κ=0.4–0.5) and synovial enhancement (κ=0.1–0.5). Intra-observer reliability was highest for marrow oedema (κ=0.6–0.8) and lowest for effusion (κ=0.4–0.7). Intra-observer reliability for synovial enhancement (κ= −0.7-0.8) and subjective synovial assessment (κ=0.4–1.0) ranged from poor to excellent. For synovial thickness, intra- and interobserver Bland-Altman plots were well clustered around the mean suggesting good agreement.

Conclusion

There were large differences across variables and only moderate agreement between observers. The most reliable parameters were presence of joint effusion and bone marrow oedema and subjective assessment of synovium.

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Change history

  • 17 October 2018

    The article “Inter- and intra-observer reliability of contrast-enhanced magnetic resonance imaging parameters in children with suspected juvenile idiopathic arthritis of the hip”.

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Authors and Affiliations

  1. Sheffield Teaching Hospitals, Northern General Hospital, Herries Road, Sheffield, S5 7AU, UK

    Francesca M. Porter-Young

  2. Academic Unit of Child Health, Sheffield Children’s NHS Foundation Trust, University of Sheffield, Sheffield, UK

    Amaka C. Offiah

  3. Department of Radiology, Sheffield Children’s NHS Foundation Trust, Sheffield, UK

    Penny Broadley & Isla Lang

  4. Department of Rheumatology, Sheffield Children’s NHS Foundation Trust, Sheffield, UK

    Anne-Marie McMahon, Philippa Howsley & Daniel P. Hawley

Authors
  1. Francesca M. Porter-Young
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  2. Amaka C. Offiah
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  3. Penny Broadley
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  4. Isla Lang
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  5. Anne-Marie McMahon
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  6. Philippa Howsley
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  7. Daniel P. Hawley
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Correspondence to Francesca M. Porter-Young.

Additional information

The original version of this article was revised: The article “Inter- and intra-observer reliability of contrast-enhanced magnetic resonance imaging parameters in children with suspected juvenile idiopathic arthritis of the hip”, written by Francesca M. Porter-Young, Amaka C. Offiah, Penny Broadley, Isla Lang, Anne-Marie McMahon, Philippa Howsley and Daniel P. Hawley, was originally published electronically on the publisher’s internet portal (currently SpringerLink) on August 3, 2018 with open access. With the author(s)’ decision to step back from Open Choice, the copyright of the article changed on August 8, 2018 to © Springer-Verlag GmbH Germany, part of Springer Nature 2018 and the article is forthwith distributed under the terms of copyright.

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Porter-Young, F.M., Offiah, A.C., Broadley, P. et al. Inter- and intra-observer reliability of contrast-enhanced magnetic resonance imaging parameters in children with suspected juvenile idiopathic arthritis of the hip. Pediatr Radiol 48, 1891–1900 (2018). https://doi.org/10.1007/s00247-018-4216-7

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  • DOI: https://doi.org/10.1007/s00247-018-4216-7

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