Males | Females | |||||
---|---|---|---|---|---|---|

VLBW (N = 103) | NBW (N = 101) | Mean Difference or Odds Ratio†§ (95% CI) | VLBW (N = 92) | NBW (N = 107) | Mean Difference or Odds Ratio†§ (95% CI) | |

8 y†† | ||||||

Weight¶ | ||||||

Mean (kg ± SD) | 26.9 ± 5.1 | 31.1 ± 6.3 | −4.3 (−5.9, −2.7)*** | 28.0 ± 6.3 | 31.7 ± 8.1 | −3.6 (−5.7, −1.5)** |

z score ± SD | −0.46 ± 1.31 | 0.34 ± .96 | −0.78 (−1.10, −0.46)*** | −0.23 ± 1.14 | 0.20 ± 1.10 | −0.39 (−0.71, −0.07)* |

Less than −2 SD | 11 (11%) | 1 (1%) | 10.6 (1.3, 85.3)* | 3 (4%) | 2 (2%) | 2.0 (0.3, 13.2) |

Height¶ | ||||||

Mean (cm ± SD) | 129.2 ± 6.4 | 133.1 ± 5.9 | −3.9 (−5.6, −2.1)*** | 130.2 ± 7.6 | 133.2 ± 7.0 | −2.9 (−5.0, −0.8)** |

z score ± SD | −0.45 ± 1.04 | 0.02 ± 0.91 | −0.46 (−0.74, −0.18)** | −0.20 ± 1.16 | 0.03 ± 1.04 | −0.21 (−0.52, 0.10) |

Less than −2 SD | 8 (8%) | 3 (3%) | 2.6 (0.7, 10.3) | 5 (6%) | 2 (2%) | 2.7 (0.5, 15.0) |

BMI | ||||||

Mean (kg/m^{2} ± SD) | 16.0 ± 2.2 | 17.4 ± 2.6 | −1.5 (−2.1, −0.8)*** | 16.3 ± 2.3 | 17.7 ± 3.1 | −1.3 (−2.1, −0.5)** |

z score ± SD | −0.35 ± 1.21 | 0.38 ± 0.94 | −0.72 (−1.03, −0.42)*** | −0.16 ± 1.05 | 0.29 ± 1.03 | −0.41 (−0.72, −0.11)** |

20 y§§ | ||||||

Weight | ||||||

Mean (kg ± SD) | 69.2 ± 13.9 | 79.9 ± 16.7 | −10.5 (−14.8, −6.2)*** | 64.9 ± 16.8 | 67.6 ± 18.3 | −2.0 (−6.9, 2.8) |

z score ± SD | −0.35 ± 1.25 | 0.53 ± 1.06 | −0.86 (−1.19, −0.54)*** | 0.26 ± 1.17 | 0.45 ± 1.16 | −0.14 (−0.47, 0.18) |

Less than −2 SD | 11 (11%) | 0 | −‡ (2.23, ∞) | 2 (2%) | 3 (3%) | 0.8 (0.1, 5.1) |

Height | ||||||

Mean (cm ± SD) | 173.7 ± 7.9 | 177.0 ± 6.8 | −3.1 (−5.2, −1.1)** | 161.7 ± 7.3 | 163.0 ± 7.0 | −1.2 (−3.2, 0.9) |

z score ± SD | −0.44 ± 1.10 | 0.03 ± 0.95 | −0.44 (−0.72, −0.15)** | −0.26 ± 1.13 | −0.06 ± 1.08 | −0.18 (−0.50, 0.14) |

Less than −2 SD | 7 (7%) | 3 (3%) | 2.3 (0.6, 9.3) | 5 (5%) | 1 (1%) | 4.0 (0.4, 36.4) |

BMI | ||||||

Mean (kg/m^{2} ± SD) | 22.9 ± 4.2 | 25.5 ± 4.9 | −2.6 (−3.8, −1.3)*** | 24.7 ± 5.2 | 25.4 ± 6.2 | −0.5 (−2.1, 1.0) |

z score ± SD | −0.33 ± 1.24 | 0.42 ± 1.09 | −0.75 (−1.08, −0.43)*** | 0.42 ± 0.93 | 0.45 ± 1.24 | 0.03 (−0.27, 0.34) |

CI indicates confidence interval.

↵*

*P*< .05.↵**

*P*< .01.↵***

*P*< .001.↵† Adjusted for maternal education and race.

↵§ Odds ratio pertains to rates of subnormal (less than −2 SD) weight and height.

^{30}↵‡ Infinite odds ratio.

↵¶ 99 male and 87 female VLBW and all the NBW subjects had weight and height measurements at age 8 years.

↵†† For males, mean age at the 8-year assessment was 8.7 years for VLBW and 8.9 years for NBW subjects. For females, mean age at the 8-year assessment was 8.6 years for VLBW and 9.0 years for NBW subjects.

↵§§ For males, mean age at the 20-year assessment was 20.2 years for VLBW and 20.1 years for NBW subjects. For females, mean age at the 20-year assessment was 20.1 years for VLBW and 20.1 years for NBW subjects.