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. 1997 Mar;76(2):F94–F100. doi: 10.1136/fn.76.2.f94

Perinatal risk factors for developmental dysplasia of the hip

A Chan, K McCaul, P Cundy, E Haan, R Byron-Scott
PMCID: PMC1720627  PMID: 9135287

Abstract

AIMS—To identify perinatal risk factors for developmental dysplasia of the hip (DDH) and define the risk for each factor.
METHODS—In this case control study, using logistic regression analysis, all 1127 cases of isolated DDH live born in South Australia in 1986-93 and notified to the South Australian Birth Defects Register were included; controls comprised 150 130 live births in South Australia during the same period without any notified congenital abnormalities.
RESULTS—Breech presentation, oligohydramnios, female sex and primiparity were confirmed as risk factors for DDH. Significant findings were an increased risk for vaginal delivery over caesarean section for breech presentation (as well as an increased risk for emergency section over elective section), high birthweight (⩾4000 g), postmaturity and older maternal age; multiple births and preterm births had a reduced risk. There was no increased risk for caesarean section in the absence of breech presentation. For breech presentation, the risk of DDH was estimated to be at least 2.7% for girls and 0.8% for boys; a combination of factors increased the risk.
CONCLUSIONS—It is suggested that the risk factors identified be used as indications for repeat screening at 6 weeks of age and whenever possible in infancy. Other indications are family history and associated abnormalities.

 Keywords: congenital hip dislocation; perinatal risk factors; screening; breech presentation.

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Selected References

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