Head-shaft angle is a risk factor for hip displacement in children with cerebral palsy.
(2015) In Acta Orthopaedica 86(2). p.229-232- Abstract
- Background and purpose - Hip dislocation in children with cerebral palsy (CP) is a common and severe problem. The Swedish follow-up program for CP (CPUP) includes standardized monitoring of the hips. Migration percentage (MP) is a widely accepted measure of hip displacement. Coxa valga and valgus of the femoral head in relation to the femoral neck can be measured as the head-shaft angle (HSA). We assessed HSA as a risk factor for hip displacement in CP. Patients and methods - We analyzed radiographs of children within CPUP from selected regions of Sweden. Inclusion criteria were children with Gross Motor Function Classification System (GMFCS) levels III-V, MP of < 40% in both hips at the first radiograph, and a follow-up period of 5... (More)
- Background and purpose - Hip dislocation in children with cerebral palsy (CP) is a common and severe problem. The Swedish follow-up program for CP (CPUP) includes standardized monitoring of the hips. Migration percentage (MP) is a widely accepted measure of hip displacement. Coxa valga and valgus of the femoral head in relation to the femoral neck can be measured as the head-shaft angle (HSA). We assessed HSA as a risk factor for hip displacement in CP. Patients and methods - We analyzed radiographs of children within CPUP from selected regions of Sweden. Inclusion criteria were children with Gross Motor Function Classification System (GMFCS) levels III-V, MP of < 40% in both hips at the first radiograph, and a follow-up period of 5 years or until development of MP > 40% of either hip within 5 years. Risk ratio between children who differed in HSA by 1 degree was calculated and corrected for age, MP, and GMFCS level using multiple Poisson regression. Results - 145 children (73 boys) with a mean age of 3.5 (0.6-9.7) years at the initial radiograph were included. 51 children developed hip displacement whereas 94 children maintained a MP of < 40%. The risk ratio for hip displacement was 1.05 (p < 0.001; 95% CI 1.02-1.08). When comparing 2 children of the same age, GMFCS level, and MP, a 10-degree difference in HSA results in a 1.6-times higher risk of hip displacement in the child with the higher HSA. Interpretation - A high HSA appears to be a risk factor for hip displacement in children with CP. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4815881
- author
- Hermanson, Maria LU ; Hägglund, Gunnar LU ; Riad, Jacques and Wagner, Philippe LU
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Acta Orthopaedica
- volume
- 86
- issue
- 2
- pages
- 229 - 232
- publisher
- Taylor & Francis
- external identifiers
-
- pmid:25428756
- wos:000351740100014
- scopus:84925965545
- pmid:25428756
- ISSN
- 1745-3682
- DOI
- 10.3109/17453674.2014.991628
- language
- English
- LU publication?
- yes
- id
- 1fdac75b-5b19-47da-9df5-e7b385c1c0ab (old id 4815881)
- alternative location
- http://www.ncbi.nlm.nih.gov/pubmed/25428756?dopt=Abstract
- date added to LUP
- 2016-04-01 10:32:30
- date last changed
- 2022-04-27 23:09:45
@article{1fdac75b-5b19-47da-9df5-e7b385c1c0ab, abstract = {{Background and purpose - Hip dislocation in children with cerebral palsy (CP) is a common and severe problem. The Swedish follow-up program for CP (CPUP) includes standardized monitoring of the hips. Migration percentage (MP) is a widely accepted measure of hip displacement. Coxa valga and valgus of the femoral head in relation to the femoral neck can be measured as the head-shaft angle (HSA). We assessed HSA as a risk factor for hip displacement in CP. Patients and methods - We analyzed radiographs of children within CPUP from selected regions of Sweden. Inclusion criteria were children with Gross Motor Function Classification System (GMFCS) levels III-V, MP of < 40% in both hips at the first radiograph, and a follow-up period of 5 years or until development of MP > 40% of either hip within 5 years. Risk ratio between children who differed in HSA by 1 degree was calculated and corrected for age, MP, and GMFCS level using multiple Poisson regression. Results - 145 children (73 boys) with a mean age of 3.5 (0.6-9.7) years at the initial radiograph were included. 51 children developed hip displacement whereas 94 children maintained a MP of < 40%. The risk ratio for hip displacement was 1.05 (p < 0.001; 95% CI 1.02-1.08). When comparing 2 children of the same age, GMFCS level, and MP, a 10-degree difference in HSA results in a 1.6-times higher risk of hip displacement in the child with the higher HSA. Interpretation - A high HSA appears to be a risk factor for hip displacement in children with CP.}}, author = {{Hermanson, Maria and Hägglund, Gunnar and Riad, Jacques and Wagner, Philippe}}, issn = {{1745-3682}}, language = {{eng}}, number = {{2}}, pages = {{229--232}}, publisher = {{Taylor & Francis}}, series = {{Acta Orthopaedica}}, title = {{Head-shaft angle is a risk factor for hip displacement in children with cerebral palsy.}}, url = {{https://lup.lub.lu.se/search/files/1931817/7370674}}, doi = {{10.3109/17453674.2014.991628}}, volume = {{86}}, year = {{2015}}, }