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Congenital hip dislocation and dysplasia in southern Chinese

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Summary

In 19 75 we carried out a survey in Hong Kong to locate Chinese children with congenital dislocation of the hip. Analysis of the available records between 1960 and 1975 gave an observed incidence which was at least 10 times less than found in Caucasians. The age and sex distribution, radiographic findings and the left-sided predominence were similar to Caucasians with congenital dislocation of the hip. However, unlike Caucasian children, the Chinese presented with dislocation and not dysplasia.

The mothers of children with congenital dislocation of the hip were compared with a control group with normal children to assess their use of the “Hong Kong” position, in which the children are carried on the back of their mother with their hips in a position of wide abduction. Since only half of the children in either group were carried in this manner, other factors must be responsible for the low incidence of congenital dislocation of the hip in southern Chinese.

Résumé

Une enquête a été réalisée à Hong-Kong en 1975 afin de dépister les enfants, d'origine chinoise, porteurs d'une luxation congénitale de la hanche. L'analyse des statistiques précédentes, de 1960 à 1975, montrait que la fréquence de cette malformation était de dix fois inférieure au moins à celle observée chez les Caucasiens. La distribution selon le sexe et l'âge, les constations radiologiques et la prédominance du côté gauche étaient identiques à ce que l'on observe chez les Caucasiens porteurs d'une luxation congénitale de la hanche. Cependant, à l'inverse des enfants caucasiens, les chinois présentaient une luxation et non une dysplasie.

Les mères des enfants atteints de luxation congénitale ont été comparées à un groupe témoin, ayant des enfants normaux, pour évaluer l'utilisation de la «position de Hong-Kong”, dans laquelle les enfants sont portés sur le dos de leurs mères, les hanches en abduction forcée. Comme la moitié seulement des enfants de chaque groupe étaient portés de cette façon, d'autres facteurs doivent être responsables de la faible fréquence de la luxation congénitale de la hanche chez les Chinois du Sud.

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Hoaglund, F.T., Kalamchi, A., Poon, R. et al. Congenital hip dislocation and dysplasia in southern Chinese. International Orthopaedics 4, 243–246 (1981). https://doi.org/10.1007/BF00266064

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