Table 1.

Percentage of HbA1c values in consecutive 6-month intervals in 2003 and 2004.

HgbA1C, %
Jan–Jun 2003Jul–Dec 2003Jan–Jun 2004Jul–Dec 2004
n24932315241512
Median10.99.819.118.51
25%–75% range8.9–13.18.1–11.47.4–10.87.0–10.4
  • 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.