Hip displacement in cerebral palsy

Soo, Brendan, Howard, Jason, J., Boyd, Roslyn N., Reid, Susan M., Lanigan, Anna, Wolfe, Rory, Reddihough, Dinah and Graham, H. Kerr (2006) Hip displacement in cerebral palsy. Journal of Bone and Joint Surgery: American volume, 88 1: 121-129. doi:10.2106/JBJS.E.00071


Author Soo, Brendan
Howard, Jason, J.
Boyd, Roslyn N.
Reid, Susan M.
Lanigan, Anna
Wolfe, Rory
Reddihough, Dinah
Graham, H. Kerr
Title Hip displacement in cerebral palsy
Journal name Journal of Bone and Joint Surgery: American volume   Check publisher's open access policy
ISSN 0021-9355
1535-1386
Publication date 2006-01
Sub-type Article (original research)
DOI 10.2106/JBJS.E.00071
Volume 88
Issue 1
Start page 121
End page 129
Total pages 9
Place of publication Needham, MA, U.S.A.
Publisher Journal of Bone and Joint Surgery
Language eng
Subject 110314 Orthopaedics
1103 Clinical Sciences
1109 Neurosciences
Formatted abstract
Background: Hip displacement is considered to be common in children with cerebral palsy but the reported incidence and the proposed risk factors vary widely. Knowledge regarding its overall incidence and associated risk factors can facilitate treatment of these children.

Methods:
An inception cohort was generated from the Victorian Cerebral Palsy Register for the birth years 1990 through 1992, inclusive, and multiple data sources pertaining to the cohort were reviewed during 2004. Gross motor function was assessed for each child and was graded according to the Gross Motor Function Classification System (GMFCS), which is a valid, reliable, five-level ordinal grading system. Hip displacement, defined as a migration percentage of >30%, was measured on an anteroposterior radiograph of the pelvis with use of a reliable technique.

Results: A full data set was obtained for 323 (86%) of 374 children in the Register for the birth years 1990 through 1992. The mean duration of follow-up was eleven years and eight months. The incidence of hip displacement for the entire birth cohort was 35%, and it showed a linear relationship with the level of gross motor function. The incidence of hip displacement was 0% for children with GMFCS level I and 90% for those with GMFCS level V. Compared with children with GMFCS level II, those with levels III, IV, and V had significantly higher relative risks of hip displacement (2.7, 4.6, and 5.9, respectively).

Conclusions:
Hip displacement is common in children with cerebral palsy, with an overall incidence of 35% found in this study. The risk of hip displacement is directly related to gross motor function as graded with the Gross Motor Function Classification System. This information may be important when assessing the risk of hip displacement for an individual child who has cerebral palsy, for counseling parents, and in the design of screening programs and resource allocation.
Keyword Hip displacement
Cerebral palsy
Gross Motor Function Classification System
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Medicine Publications
 
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Created: Fri, 08 Jan 2010, 09:59:32 EST by Elissa Saffery on behalf of Faculty Of Health Sciences