J F Haasbeek1, J G Wright, D M Hedden. 1. Division of Orthopedic Surgery, Hospital for Sick Children, University of Toronto, Ont.
Abstract
OBJECTIVE: To determine if there are epidemiologic differences between patients with early and late developmental dislocation of the hip (DDH). DESIGN: A chart review. SETTING: A university-affiliated children's hospital. PATIENTS: Two hundred and forty-three children, 191 with early DDH and 52 with late DDH. MAIN OUTCOME MEASURES: Sex, side involved and prevalence of bilaterality. RESULTS: There were significant differences between the two groups with respect to side involved (p < 0.0002) and bilaterality (p = 0.006) but not in relation to sex. Left-sided dislocations were predominant in the early group and right-sided dislocations in the late group. Bilaterality was more common in the late group. CONCLUSION: There is circumstantial epidemiologic evidence that late DDH may be a different entity from early DDH.
OBJECTIVE: To determine if there are epidemiologic differences between patients with early and late developmental dislocation of the hip (DDH). DESIGN: A chart review. SETTING: A university-affiliated children's hospital. PATIENTS: Two hundred and forty-three children, 191 with early DDH and 52 with late DDH. MAIN OUTCOME MEASURES: Sex, side involved and prevalence of bilaterality. RESULTS: There were significant differences between the two groups with respect to side involved (p < 0.0002) and bilaterality (p = 0.006) but not in relation to sex. Left-sided dislocations were predominant in the early group and right-sided dislocations in the late group. Bilaterality was more common in the late group. CONCLUSION: There is circumstantial epidemiologic evidence that late DDH may be a different entity from early DDH.
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