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Evid Based Nurs 1:20 doi:10.1136/ebn.1.1.20
  • Causation

Many perinatal factors increased the risk of developmental dysplasia of the hip

Risk factors for developmental dysplasia of the hip for singleton births

Risk factor Odds ratio Confidence interval
Increased risk
Maternal age 25–29 years 1.46 1.09 to 1.96
Maternal age 30–34 years 1.71 1.26 to 2.32
Maternal age ≥ 35 years 1.72 1.22 to 2.44
Parity 0 2.19 1.83 to 2.62
Parity 1 1.29 1.07 to 1.56
Breech presentation and caesarean delivery 10.0 8.58 to 11.7
Emergency caesarean delivery 13.2 10.7 to 16.3
Elective caesarean delivery 7.56 6.27 to 9.12
Breech presentation and delivery 17.2 12.8 to 23.0
Female sex 3.94 3.41 to 4.56
Living in a metropolitan area 1.45 1.23 to 1.69
Living in an outer metropolitan area 1.86 1.41 to 2.46
Presence of oligohydramnios 3.97 1.69 to 9.35
Birth weight 4000–4499 g 1.55 1.26 to 1.91
Birth weight ≥ 4500 g 2.67 1.81 to 3.94
Gestation 41 weeks 1.26 1.05 to 1.51
Gestation ≥ 42 weeks 1.48 1.02 to 2.13
Decreased risk
Birth weight < 2000 g 0.30 0.12 to 0.77
Birth weight 2000–2499 g 0.52 0.31 to 0.88
Gestation < 37 weeks 0.42 0.25 to 0.69
Gestation 37 weeks 0.59 0.40 to 0.86
Gestation 38 weeks 0.80 0.66 to 0.98

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