HgbA1C, % | ||||
---|---|---|---|---|

Jan–Jun 2003 | Jul–Dec 2003 | Jan–Jun 2004 | Jul–Dec 2004 | |

n | 249 | 323 | 1524 | 1512 |

Median | 10.9 | 9.8^{1} | 9.1^{1} | 8.5^{1} |

25%–75% range | 8.9–13.1 | 8.1–11.4 | 7.4–10.8 | 7.0–10.4 |

1 Wilcoxon rank-sum tests showed that each interval is significantly different from the preceding value (

*P*≤0.0001 for all). Kruskal–Wallis test for a difference among the groups showed*P*<0.0001.