All Infants | No CP | Any CP | Mild CP | Moderate CP | Severe CP | |
---|---|---|---|---|---|---|

n = 2113 | n = 1866 (88%) | n = 247^{a} (12%) | n = 102 (41%) | n = 99 (40%) | n = 45 (18%) | |

Mean BSID III cognitive score ± SD (n) | 89.2 ± 15.4 (2052) | 91.4 ± 13.9 (1818) | 71.7 ± 15.0 (234) | 81.1 ± 13.3 (100) | 67.8 ± 12.6 (94) | 56.8 ± 6.3 (39) |

Mean BSID III composite motor ± SD (n) | 87.7 ± 16.4 (2023) | 90.7 ± 13.7 (1793) | 64.1 ± 16.0 (230) | 76.7 ± 13.1 (99) | 57.1 ± 10.9 (91) | 48.2 ± 4.9 (39) |

Mean GM scaled score ± SD (n) | 7.5 ± 2.8 (2003) | 7.9 ± 2.4 (1799) | 3.4 ± 2.5 (204) | 5.2 ± 2.4 (99) | 1.8 ± 1.1 (85) | 1.0 ± 0 (19) |

Mean FM scaled score ± SD (n) | 8.6 ± 2.9 (2007) | 9.0 ± 2.7 (1805) | 5.5 ± 3.2 (202) | 7.1 ± 2.6 (99) | 4.2 ± 3.0 (83) | 2.5 ± 2.1 (19) |

Infants with CP were significantly different from infants without CP for all four outcomes (

*P*< 0.0001 for each; nonparametric Kruskal-Wallis Test). There are also significant differences across levels of CP for all four outcomes (*P*< 0.0001 for each; nonparametric Kruskal-Wallis Test). Pairwise comparisons between different levels of severity of CP (No CP, Mild CP, Moderate CP, and Severe CP) were significant with*P*< .0001 for all four outcomes; nonparametric Kruskal-Wallis Test.↵a One infant with CP had missing data for severity.