Aims: To evaluate the relationship between daily sensor scan rates and changes in HbA1c and hypoglycemia in children.
Methods: We enrolled 145 paediatric T1D patients into a prospective, interventional study of the impact of the FreeStyle Libre 1 system on measures of glycemic control.
Results: HbA1c was higher at lower scan rates, and decreased as the scan rate increased to 15-20 scans, after which it rose at higher scan rates. An analysis of the change in hypoglycemia, based on the number of daily sensor scans, showed there was a significant correlation between daily scan rates and hypoglycemia. Subjects with higher daily scan rates reduced all levels of hypoglycaemia.
Conclusions: HbA1c is higher at lower scan rates, and decreases as scan rate increases. Reductions in hypoglycemia were evident in subjects with higher daily scan rates.
Keywords: flash glucose monitoring; hypoglycemia; sensor scanning.