Fig. 3

Clarke error grid analysis comparing measures of continuous glucose monitors vs capillary blood glucometer measures. The figure is divided in the following 5 regions: Region A values within 20% of the reference sensor; Region B values outside 20% of the reference sensor, but that would not lead to an inappropriate treatment, Region C values leading to an unnecessary treatment; Region D values indicating a potentially dangerous failure to detect hypo- or hyper-glycaemia; Region E values that would confuse treatment of hypoglycaemia for hyperglycaemia, and vice versa. CGM glucose levels measured by continuous glucose monitors, CBG capillary glucose levels measured by a glucometer