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Reliability of hip migration index in children with cerebral palsy: the classic and modified methods

 Sun Mi Kim  ;  Eun Geol Sim  ;  Seong Gyu Lim  ;  Eun Sook Park 
 Annals of Rehabilitation Medicine, Vol.36(1) : 33-38, 2012 
Journal Title
 Annals of Rehabilitation Medicine 
Issue Date
OBJECTIVE: To determine reliability and clinical use of two methods of migration index (MI) in CP patients with or without hip dysplasia. METHOD: The materials included radiographs of 200 hips of children with cerebral palsy. Conventional anteroposterior radiographs of the pelvis were taken with the child in the supine position with standardized methods. Two rehabilitation doctors measured the migration index using two methods. In the classic method, the lateral margin of the acetabular roof was used as a landmark and in the modified method the lateral margin of the sourcil was used as a landmark. Each rater measured the migration index at three separate times with a time interval of at least one week. Intraclass correlation (ICC) was used to test the inter- and intra-rater reliability. RESULTS: MI shows excellent intra-rater reliability in both the classic and modified methods, but the inter-rater reliability was higher in the classic method than in the modified method. When categorized according to the sourcil classification, inter-rater reliability was higher in the normal sourcil type and lower in the dysplastic sourcil types. CONCLUSION: Generally, the classic method showed higher reliability than the modified method, even though the reliability of the MI measurement was relatively high with both methods. KEYWORDS: Cerebral palsy, Hip joint, Migration index, Radiography, Reliability
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1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Rehabilitation Medicine (재활의학교실)
Yonsei Authors
김선미(Kim, Sun Mi)
박은숙(Park, Eun Sook) ORCID logo https://orcid.org/0000-0002-9144-3063
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