The head shaft angle is associated with hip displacement in children at GMFCS levels III-V - a population based study

L. Finlayson; T. Czuba; M. S. Gaston; G. Hägglund; J. E. Robb

doi:10.1186/s12891-018-2275-4

The head shaft angle is associated with hip displacement in children at GMFCS levels III-V - a population based study

L. Finlayson, T. Czuba, M. S. Gaston, G. Hägglund, J. E. Robb

Research output: Contribution to journal › Article › peer-review

Abstract

Background: An increased Head Shaft Angle (HSA) has been reported as a risk factor for hip displacement in children with cerebral palsy (CP) but opinions differ in the literature. The purpose of this study was to re-evaluate the relationship between HSA and hip displacement in a different population of children with CP.
Methods: The Cerebral Palsy Integrated Pathway Scotland surveillance programme includes 95% of all children with CP in Scotland. The pelvic radiographs from 640 children in GMFCS levels III-V were chosen. The most displaced hip was analysed and the radiographs used were those taken at the child’s first registration in the database to avoid the potential effects of surveillance on subsequent hip centration. A logistic regression model was used with hip displacement (migration percentage [MP] ≥40%) as outcome and HSA, GMFCS, age and sex as covariates.
Results: The MP was ≥40% in 118 hips with a mean HSA of 164° (range 121–180°) and < 40% in 522 hips with a mean HSA of 160° (range 111–180°). The logistic regression analysis showed no significant influence of age and sex on MP in this population but a high GMFCS level was strongly associated with hip displacement. An increased HSA was also associated with hip displacement, a 10° difference in HSA for children adjusted for age, sex, and GMFCS gave an odds ratio of 1.26 for hip displacement equal or above 40% (p = 0.009) and hips with HSA above 164.5 degrees had an odds ratio of 1.96 compared with hips with HSA below 164.5 degrees (p = 0.002).
Conclusion: These findings confirm that HSA is associated with hip displacement in children in GMFCS levels III-V.

Original language	English
Article number	356
Number of pages	4
Journal	BMC Musculoskeletal Disorders
Volume	19
DOIs	https://doi.org/10.1186/s12891-018-2275-4
Publication status	Published - 5 Oct 2018

Keywords

Children
Cerebral palsy
Hip displacement
Head shaft angle

Access to Document

10.1186/s12891-018-2275-4Licence: CC BY

Finlayson_2018_BMCMD_Headshaftangle_CC
Copyright © The Author(s). 2018 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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
Final published version, 704 KBLicence: CC BY

Cite this

@article{3db66f8a22b14919b2c7fb4a43910b92,

title = "The head shaft angle is associated with hip displacement in children at GMFCS levels III-V - a population based study",

abstract = "Background: An increased Head Shaft Angle (HSA) has been reported as a risk factor for hip displacement in children with cerebral palsy (CP) but opinions differ in the literature. The purpose of this study was to re-evaluate the relationship between HSA and hip displacement in a different population of children with CP.Methods: The Cerebral Palsy Integrated Pathway Scotland surveillance programme includes 95% of all children with CP in Scotland. The pelvic radiographs from 640 children in GMFCS levels III-V were chosen. The most displaced hip was analysed and the radiographs used were those taken at the child{\textquoteright}s first registration in the database to avoid the potential effects of surveillance on subsequent hip centration. A logistic regression model was used with hip displacement (migration percentage [MP] ≥40%) as outcome and HSA, GMFCS, age and sex as covariates.Results: The MP was ≥40% in 118 hips with a mean HSA of 164° (range 121–180°) and < 40% in 522 hips with a mean HSA of 160° (range 111–180°). The logistic regression analysis showed no significant influence of age and sex on MP in this population but a high GMFCS level was strongly associated with hip displacement. An increased HSA was also associated with hip displacement, a 10° difference in HSA for children adjusted for age, sex, and GMFCS gave an odds ratio of 1.26 for hip displacement equal or above 40% (p = 0.009) and hips with HSA above 164.5 degrees had an odds ratio of 1.96 compared with hips with HSA below 164.5 degrees (p = 0.002).Conclusion: These findings confirm that HSA is associated with hip displacement in children in GMFCS levels III-V.",

keywords = "Children, Cerebral palsy, Hip displacement, Head shaft angle",

author = "L. Finlayson and T. Czuba and Gaston, {M. S.} and G. H{\"a}gglund and Robb, {J. E.}",

year = "2018",

month = oct,

day = "5",

doi = "10.1186/s12891-018-2275-4",

language = "English",

volume = "19",

journal = "BMC Musculoskeletal Disorders",

issn = "1471-2474",

publisher = "BioMed Central",

}

TY - JOUR

T1 - The head shaft angle is associated with hip displacement in children at GMFCS levels III-V - a population based study

AU - Finlayson, L.

AU - Czuba, T.

AU - Gaston, M. S.

AU - Hägglund, G.

AU - Robb, J. E.

PY - 2018/10/5

Y1 - 2018/10/5

N2 - Background: An increased Head Shaft Angle (HSA) has been reported as a risk factor for hip displacement in children with cerebral palsy (CP) but opinions differ in the literature. The purpose of this study was to re-evaluate the relationship between HSA and hip displacement in a different population of children with CP.Methods: The Cerebral Palsy Integrated Pathway Scotland surveillance programme includes 95% of all children with CP in Scotland. The pelvic radiographs from 640 children in GMFCS levels III-V were chosen. The most displaced hip was analysed and the radiographs used were those taken at the child’s first registration in the database to avoid the potential effects of surveillance on subsequent hip centration. A logistic regression model was used with hip displacement (migration percentage [MP] ≥40%) as outcome and HSA, GMFCS, age and sex as covariates.Results: The MP was ≥40% in 118 hips with a mean HSA of 164° (range 121–180°) and < 40% in 522 hips with a mean HSA of 160° (range 111–180°). The logistic regression analysis showed no significant influence of age and sex on MP in this population but a high GMFCS level was strongly associated with hip displacement. An increased HSA was also associated with hip displacement, a 10° difference in HSA for children adjusted for age, sex, and GMFCS gave an odds ratio of 1.26 for hip displacement equal or above 40% (p = 0.009) and hips with HSA above 164.5 degrees had an odds ratio of 1.96 compared with hips with HSA below 164.5 degrees (p = 0.002).Conclusion: These findings confirm that HSA is associated with hip displacement in children in GMFCS levels III-V.

AB - Background: An increased Head Shaft Angle (HSA) has been reported as a risk factor for hip displacement in children with cerebral palsy (CP) but opinions differ in the literature. The purpose of this study was to re-evaluate the relationship between HSA and hip displacement in a different population of children with CP.Methods: The Cerebral Palsy Integrated Pathway Scotland surveillance programme includes 95% of all children with CP in Scotland. The pelvic radiographs from 640 children in GMFCS levels III-V were chosen. The most displaced hip was analysed and the radiographs used were those taken at the child’s first registration in the database to avoid the potential effects of surveillance on subsequent hip centration. A logistic regression model was used with hip displacement (migration percentage [MP] ≥40%) as outcome and HSA, GMFCS, age and sex as covariates.Results: The MP was ≥40% in 118 hips with a mean HSA of 164° (range 121–180°) and < 40% in 522 hips with a mean HSA of 160° (range 111–180°). The logistic regression analysis showed no significant influence of age and sex on MP in this population but a high GMFCS level was strongly associated with hip displacement. An increased HSA was also associated with hip displacement, a 10° difference in HSA for children adjusted for age, sex, and GMFCS gave an odds ratio of 1.26 for hip displacement equal or above 40% (p = 0.009) and hips with HSA above 164.5 degrees had an odds ratio of 1.96 compared with hips with HSA below 164.5 degrees (p = 0.002).Conclusion: These findings confirm that HSA is associated with hip displacement in children in GMFCS levels III-V.

KW - Children

KW - Cerebral palsy

KW - Hip displacement

KW - Head shaft angle

U2 - 10.1186/s12891-018-2275-4

DO - 10.1186/s12891-018-2275-4

M3 - Article

SN - 1471-2474

VL - 19

JO - BMC Musculoskeletal Disorders

JF - BMC Musculoskeletal Disorders

M1 - 356

ER -

The head shaft angle is associated with hip displacement in children at GMFCS levels III-V - a population based study

Abstract

Keywords

Access to Document

Fingerprint

Cite this