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Pelvic obliquity and measurement of hip displacement in children with cerebral palsy

Hägglund, Gunnar LU ; Goldring, Mikael ; Hermanson, Maria LU and Rodby-Bousquet, Elisabet LU (2018) In Acta Orthopaedica 89(6). p.652-655
Abstract

Background and purpose — Pelvic obliquity, common in individuals with cerebral palsy (CP), changes the muscle force vector on the hip joint and probably affects the risk of hip dislocation. We evaluated a new method for measurement of hip displacement in CP that takes the pelvic obliquity into account: the pelvic adjusted migration percentage (PAMP). Children and methods — From the Swedish surveillance program for cerebral palsy (CPUP), the first pelvic radiograph of 268 children <18 years in southern Sweden during a 3-year period were evaluated. Pelvic obliquity, PAMP, and the migration percentage (MP) were measured. 50 radiographs were randomly selected for analysis of interrater reliability by three raters using the intraclass... (More)

Background and purpose — Pelvic obliquity, common in individuals with cerebral palsy (CP), changes the muscle force vector on the hip joint and probably affects the risk of hip dislocation. We evaluated a new method for measurement of hip displacement in CP that takes the pelvic obliquity into account: the pelvic adjusted migration percentage (PAMP). Children and methods — From the Swedish surveillance program for cerebral palsy (CPUP), the first pelvic radiograph of 268 children <18 years in southern Sweden during a 3-year period were evaluated. Pelvic obliquity, PAMP, and the migration percentage (MP) were measured. 50 radiographs were randomly selected for analysis of interrater reliability by three raters using the intraclass correlation coefficient (ICC). The correlations between PAMP/MP and pelvic obliquity were analyzed with Pearson correlation coefficients. Results — The interrater reliability for all 3 measurements was high (ICCs 0.88–0.97). The correlation between the high side of the pelvic obliquity and the difference between right and left hip displacement was higher for PAMP (r = 0.70) than for MP (r = 0.41). Interpretation — The new PAMP measurement showed high interrater reliability and a higher correlation with pelvic obliquity than MP. We suggest the use of PAMP at least in hips with a pelvic obliquity exceeding 5°.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Acta Orthopaedica
volume
89
issue
6
pages
4 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85055278578
  • pmid:30326758
ISSN
1745-3674
DOI
10.1080/17453674.2018.1519104
language
English
LU publication?
yes
id
c601178f-1169-4b1e-b1ab-a332f195344f
date added to LUP
2019-01-09 14:52:48
date last changed
2021-10-03 03:39:54
@article{c601178f-1169-4b1e-b1ab-a332f195344f,
  abstract     = {<p>Background and purpose — Pelvic obliquity, common in individuals with cerebral palsy (CP), changes the muscle force vector on the hip joint and probably affects the risk of hip dislocation. We evaluated a new method for measurement of hip displacement in CP that takes the pelvic obliquity into account: the pelvic adjusted migration percentage (PAMP). Children and methods — From the Swedish surveillance program for cerebral palsy (CPUP), the first pelvic radiograph of 268 children &lt;18 years in southern Sweden during a 3-year period were evaluated. Pelvic obliquity, PAMP, and the migration percentage (MP) were measured. 50 radiographs were randomly selected for analysis of interrater reliability by three raters using the intraclass correlation coefficient (ICC). The correlations between PAMP/MP and pelvic obliquity were analyzed with Pearson correlation coefficients. Results — The interrater reliability for all 3 measurements was high (ICCs 0.88–0.97). The correlation between the high side of the pelvic obliquity and the difference between right and left hip displacement was higher for PAMP (r = 0.70) than for MP (r = 0.41). Interpretation — The new PAMP measurement showed high interrater reliability and a higher correlation with pelvic obliquity than MP. We suggest the use of PAMP at least in hips with a pelvic obliquity exceeding 5°.</p>},
  author       = {Hägglund, Gunnar and Goldring, Mikael and Hermanson, Maria and Rodby-Bousquet, Elisabet},
  issn         = {1745-3674},
  language     = {eng},
  number       = {6},
  pages        = {652--655},
  publisher    = {Taylor & Francis},
  series       = {Acta Orthopaedica},
  title        = {Pelvic obliquity and measurement of hip displacement in children with cerebral palsy},
  url          = {http://dx.doi.org/10.1080/17453674.2018.1519104},
  doi          = {10.1080/17453674.2018.1519104},
  volume       = {89},
  year         = {2018},
}