Cost category | Faster increments (n=1224) | Slower increments (n=1246) | |||||

Total cost | Mean | SD | Total cost | Mean | SD | Bootstrap mean difference (95% CI) | |

Costs of initial hospital care | 124 386 552 | 101 623* | 80 759 | 126 923 790 | 101 865 | 80 498 | −242 (−6307 to 6251) |

Costs from initial discharge from hospital up to 24 months corrected age | 10 151 856 | 8294 | 49 585 | 9 698 864 | 7784 | 38 473 | 510 (−2864 to 4508) |

Total costs of health service use after initial discharge from hospital and up to 24 months corrected age† | 134 538 408 | 109 917 | 98 040 | 136 623 900 | 109 650 | 94 788 | 267 (−6928 to 8117) |

*Mean total costs are calculated as total cost for this category divided by the sample size of the arm (eg, 124 386 552/1224 for costs of initial hospital care in the faster feeding arm).

†Total costs are the sum of costs of initial hospital care and costs from discharge up to 24 months corrected age.