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Lookup NU author(s): Ajay Malviya
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PURPOSE:To evaluate the degree of inter-rater agreement in identifying important radiographic features of femoroacetabular impingement (FAI) and hip dysplasia. In addition, the effect of supplementary investigations (CT and/or MRI) and clinical experience of the observer was determined.METHODS:During the British Hip Society meeting 2013 participants were asked to remark on various radiological parameters of FAI and dysplasia, make a diagnosis, and recommended treatment. Free-Marginal Multirater Kappa analysis was performed to determine multi-rater agreement.RESULTS:The 'crossover sign', 'ischial spine sign' and 'lateral centre-edge angle' were found to have the highest inter-rater agreement. For the whole group only fair agreement was seen for the diagnosis of type of FAI (κ = 0.3) and dysplasia (κ = 0.3) after plain radiographs with supplementary investigations being only marginally helpful in improving the diagnosis of type of FAI (κ = 0.4). In contrast, high-volume hip preservation surgeons had a substantial improvement in diagnosis after supplementary investigations (type of FAI κ = 0.75, and dysplasia (κ = 0.65).CONCLUSIONS:Our study shows that agreement on diagnosis and treatment on the basis of plain radiographs is low amongst general hip surgeons. This improved with surgeon volume and experience, suggesting that protocols for diagnosis of these conditions need to be altered as assessment appears to be rather subjective.
Author(s): Malviya A, Raza A, Witt JD
Publication type: Article
Publication status: Published
Journal: Hip International
Print publication date: 16/05/2016
Online publication date: 30/03/2016
Acceptance date: 03/12/2015
ISSN (print): 1120-7000
ISSN (electronic): 1724-6067
Publisher: Wichtig Publishing
PubMed id: 27034101
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