Do high blood glucose peaks contribute to higher HbA 1c ? Results from repeated continuous glucose measurements in child

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Do high blood glucose peaks contribute to higher HbA1c? Results from repeated continuous glucose measurements in children Samuelsson Ulf, Hanas Ragnar, Whiss Per Arne, Ludvigsson Johnny Linköping, Sweden

Methods: Thirty-two patients were randomized into two study arms, one open and the other blinded. Both arms had 8 pump users and 8 patients with multiple daily injections (MDI). After three months the two arms crossed over. Both study arms wore a continuous glucose monitoring system (CGMS) for 3 days every 2 weeks. HbA1c was determined before and after each 3-month study period. Results: There was no relationship between HbA1c and s.c. glucose AUC or between HbA1c and the number of peaks >15.0 mmol/L when all CGMS profiles during the 6 months were taken together. Children on MDI showed a positive relationship between HbA1c and AUC (P15.0 mmol/L (r=0.04). This lack of relationship was also seen when comparing the HbA1c values with three different baselines of AUC (10, 15 and 20 mmol/L). When the low HbA1c values (