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  • Title: Hip displacement in children with cerebral palsy in Scotland: a total population study.
    Author: Bugler KE, Gaston MS, Robb JE.
    Journal: J Child Orthop; 2018 Dec 01; 12(6):635-639. PubMed ID: 30607212.
    Abstract:
    PURPOSE: The purpose of this study is to report the number of children from a total population of children with cerebral palsy (CP) in Scotland who had a displaced or dislocated hip at first registration in a national surveillance programme. METHODS: Migration percentage (MP), laterality, Gross Motor Function Classification System (GMFCS) level, CP subtype, distribution of CP and age were analyzed in 1171 children. Relative risk was calculated with 95% confidence intervals. Hip displacement and dislocation were defined as a MP of 40 to 99 and > 100 respectively. RESULTS: Radiographs were available from the first assessment of 1171 children out of 1933 children registered on the system. In all, 2.5% of children had either one or both hips dislocated (29/1171) and dislocation only occurred in children of GMFCS levels IV and V. A total of 10% of children had a MP 40 to 99 in one or both hips (117/1171). An increasing GMFCS level was strongly associated with an abnormal MP. Hip dislocation was unusual in patients under the age of seven years. A MP of 40 to 99 was not seen in children with isolated dystonia. Displacement was more frequent in children with bilateral involvement and dislocation was only seen in spastic and mixed tone groups. CONCLUSION: This data gives an overview of the number of CP children who have hip displacement/dislocation in Scotland and who will possibly require surgery. LEVEL OF EVIDENCE: I.
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