Screening strategy | |||
---|---|---|---|

Clinical screening alone | Universal ultrasound | Selective ultrasound | |

Numbers per 100000 live births, rounded to nearest whole number, unless otherwise stated. | |||

*DDH, developmental dysplasia of the hip. | |||

†Baseline assumption that all newborns are examined clinically and are assessed for recognised risk factors, but that 2% miss ultrasound screening in a universal ultrasound programme as cited in Marks et al,^{19} giving rise to two cases of DDH. | |||

Expected number with DDH* | 120 | 120 | 120 |

Number not screened† | 0 | 2000 | 0 |

Positive screening result, n (%) | 2127 (2.1%) | 7662 (7.7%) | 8125 (8.1%) |

True positives | 42 | 92 | 71 |

False positives | 2085 | 7570 | 8054 |

Negative screening result, n | 97873 | 90338 | 91875 |

False negatives | 78 | 26 | 49 |

True negatives | 97795 | 90312 | 91826 |

Detection rate, % | 35% | 76% | 60% |

False positive rate, % | 2.1% | 7.6% | 8.1% |

Odds of being affected given a positive screening result | 1:51 | 1:84 | 1:114 |