N = 280 | Time to Ductal Closure (d), Median (95% CI) | Pairwise Comparison Between the Groups, P, Mantel-Cox Log Rank Test | Adjusted P Value for Multiple Comparisons (Bonferroni Correction) |
---|---|---|---|

IQR [Q1, Q3] | |||

SE of the Median (Kaplan-Meier) | |||

≤750 g^{a} | 48 (9–87) | — | — |

[8, 94] | .700^{b} | >.999^{b} | |

20 | .058^{c} | .347^{c} | |

<.001^{d} | <.001^{d} | ||

751–1000 g^{b} | 22 (6–38) | .700^{a} | >.999^{a} |

[7, NA] | — | — | |

8 | .042^{c} | .255^{c} | |

<.001^{d} | <.001^{d} | ||

1001–1250 g^{c} | 9 (6–12) | .058^{a} | .347^{a} |

[3, 44] | .042^{b} | .255^{b} | |

2 | — | — | |

<.001^{d} | .002^{d} | ||

1251–1500 g^{d} | 8 (7–9) | <.001^{a} | <.001^{a} |

[3, 12] | <.001^{b} | <.001^{b} | |

1 | <.001^{c} | .002^{c} | |

— | — | ||

<26+0 GA^{e} | 71 (51–91) | — | — |

[18, NA] | .028^{f} | .169^{f} | |

10 | <.001^{g} | <.001^{g} | |

<.001^{h} | <.001^{h} | ||

26+0–27+6 GA^{f} | 13 (0–34) | .028^{e} | .169^{e} |

[6, NA] | — | — | |

11 | .001^{g} | .003^{g} | |

<.001^{h} | <.001^{h} | ||

28+0–29+6 GA^{g} | 8 (7–9) | <.001^{e} | <.001^{e} |

[5, 17] | .001^{f} | .003^{f} | |

1 | — | — | |

.027^{h} | .164^{h} | ||

>30 GA^{h} | 9 (4–8) | <.001^{e} | <.001^{e} |

[2, 11] | <.001^{f} | <.001^{f} | |

1 | .027^{g} | .164^{g} | |

— | — |

*P*value is a result of comparison of the BW and GA groups labeled a, b, c, d and e, f, g, h, respectively. NA, not applicable (because Q3 was outside of the inpatient stay); IQR, interquartile range; Q1, 25th percentile; Q3, 75th percentile.