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A novel radiographic scoring system for growth abnormalities and structural change in children with juvenile idiopathic arthritis of the hip

Shelmerdine, SC; Di Paolo, PL; Rieter, JFMM; Malattia, C; Tanturri de Horatio, L; Rosendahl, K; (2018) A novel radiographic scoring system for growth abnormalities and structural change in children with juvenile idiopathic arthritis of the hip. Pediatric Radiology , 48 (8) pp. 1086-1095. 10.1007/s00247-018-4136-6. Green open access

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Abstract

Background: Approximately 20–50% of children with juvenile idiopathic arthritis (JIA) have hip involvement within 6 years of diagnosis. Scoring systems for hip-related radiographic changes are lacking. // Objective: To examine precision of potential radiographic variables and to suggest a scoring system. // Materials and methods: We reviewed a set of 75 pelvic radiographs from 75 children with JIA hip involvement across two European centres. We assessed findings of (1) destructive change and (2) growth abnormality, according to a pre-defined scoring system. All radiographs were scored independently by two sets of radiologists. One set scored the radiographs a second time. We used kappa statistics to rate inter- and intra-observer variability. // Results: Assessment of erosions of the femoral head, femoral neck and the acetabulum showed moderate to good agreement for the same reader (kappa of 0.5–0.8). The inter-reader agreement was, however, low (kappa of 0.1–0.3). There was moderate to high agreement for the assessment of femoral head flattening (kappa of 0.6–0.7 for the same reader, 0.3–0.7 between readers). Joint space narrowing showed moderate to high agreement both within and between observers (kappa of 0.4–0.8). Femoral neck length and width measurements, the centrum–collum–diaphysis angle, and trochanteric–femoral head lengths were relatively precise, with 95% limits of agreement within 10–15% of the observer average. // Conclusion: Several radiographic variables of destructive and growth abnormalities in children with hip JIA have reasonable reproducibility. We suggest that future studies on clinical validity focus on assessing only reproducible radiographic variables.

Type: Article
Title: A novel radiographic scoring system for growth abnormalities and structural change in children with juvenile idiopathic arthritis of the hip
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s00247-018-4136-6
Publisher version: https://doi.org/10.1007/s00247-018-4136-6
Language: English
Additional information: Open Access: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http:// creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Keywords: Children, Hip, Juvenile idiopathic arthritis, Measurements, Radiography, Repeatability, Severity scoring
URI: http://discovery.ucl.ac.uk/id/eprint/10054215
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