Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Comparison of different radiographic methods to measure the slip angle in children with slipped capital femoral epiphysis (SCFE)

Lindell, Mikael ; Nilsson, Jens LU ; Herngren, Bengt LU ; Örtegren, Jakob LU ; Stenmarker, Margaretha ; Tiderius, Carl Johan LU and Michno, Piotr (2024) In Acta Radiologica 65(9). p.1109-1114
Abstract

Background: The management of patients with slipped capital femoral epiphysis (SCFE) requires imaging diagnostics of good quality and accurate measurement of the degree of slippage. In Sweden, three different radiological methods are commonly used: the calcar femorale method; the Billing method; and the Head-shaft angle described by Southwick. Purpose: To evaluate whether any of the three most common methods used in Sweden to measure the slip angle was more useful and reproducible than the others. Material and Methods: Two experienced orthopaedists measured the slip angle in preoperative hip radiographs. Intra- and inter-observer variability between the two experienced observers and the reported value by clinicians who treated the child... (More)

Background: The management of patients with slipped capital femoral epiphysis (SCFE) requires imaging diagnostics of good quality and accurate measurement of the degree of slippage. In Sweden, three different radiological methods are commonly used: the calcar femorale method; the Billing method; and the Head-shaft angle described by Southwick. Purpose: To evaluate whether any of the three most common methods used in Sweden to measure the slip angle was more useful and reproducible than the others. Material and Methods: Two experienced orthopaedists measured the slip angle in preoperative hip radiographs. Intra- and inter-observer variability between the two experienced observers and the reported value by clinicians who treated the child with SCFE was evaluated. Results: The intraclass correlation coefficient (ICC) confidence interval (CI) between the two experienced observers and the reporting clinicians overlapped for the three methods. In 37% of the cases, the difference was more than 5° between the experienced observers’ measurement and the reported value by clinicians. The two experienced orthopaedists' intra- and inter-observer variability was low. Conclusion: The observer's experience is more important than the method of choice when measuring the slip angle in SCFE. The research group recommends the calcar femorale method due to its feasibility on the versatile and commonly used frog leg lateral view.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
conventional radiography, intra- and inter-observer, measurement repeatability, skeletal-appendicular, Slipped capital femoral epiphysis
in
Acta Radiologica
volume
65
issue
9
pages
6 pages
publisher
SAGE Publications
external identifiers
  • scopus:85203466451
  • pmid:39211940
ISSN
0284-1851
DOI
10.1177/02841851241271999
language
English
LU publication?
yes
additional info
Publisher Copyright: © The Foundation Acta Radiologica 2024.
id
f5026c4a-cc9e-449e-b74e-1aa9d41ebc24
date added to LUP
2024-12-04 13:37:49
date last changed
2025-07-17 08:23:22
@article{f5026c4a-cc9e-449e-b74e-1aa9d41ebc24,
  abstract     = {{<p>Background: The management of patients with slipped capital femoral epiphysis (SCFE) requires imaging diagnostics of good quality and accurate measurement of the degree of slippage. In Sweden, three different radiological methods are commonly used: the calcar femorale method; the Billing method; and the Head-shaft angle described by Southwick. Purpose: To evaluate whether any of the three most common methods used in Sweden to measure the slip angle was more useful and reproducible than the others. Material and Methods: Two experienced orthopaedists measured the slip angle in preoperative hip radiographs. Intra- and inter-observer variability between the two experienced observers and the reported value by clinicians who treated the child with SCFE was evaluated. Results: The intraclass correlation coefficient (ICC) confidence interval (CI) between the two experienced observers and the reporting clinicians overlapped for the three methods. In 37% of the cases, the difference was more than 5° between the experienced observers’ measurement and the reported value by clinicians. The two experienced orthopaedists' intra- and inter-observer variability was low. Conclusion: The observer's experience is more important than the method of choice when measuring the slip angle in SCFE. The research group recommends the calcar femorale method due to its feasibility on the versatile and commonly used frog leg lateral view.</p>}},
  author       = {{Lindell, Mikael and Nilsson, Jens and Herngren, Bengt and Örtegren, Jakob and Stenmarker, Margaretha and Tiderius, Carl Johan and Michno, Piotr}},
  issn         = {{0284-1851}},
  keywords     = {{conventional radiography; intra- and inter-observer; measurement repeatability; skeletal-appendicular; Slipped capital femoral epiphysis}},
  language     = {{eng}},
  number       = {{9}},
  pages        = {{1109--1114}},
  publisher    = {{SAGE Publications}},
  series       = {{Acta Radiologica}},
  title        = {{Comparison of different radiographic methods to measure the slip angle in children with slipped capital femoral epiphysis (SCFE)}},
  url          = {{http://dx.doi.org/10.1177/02841851241271999}},
  doi          = {{10.1177/02841851241271999}},
  volume       = {{65}},
  year         = {{2024}},
}