The Clarke Error Grid Analysis (EGA) was developed in 1987 to quantify clinical accuracy of patient estimates of their current blood

glucose Glucose is a simple sugar with the molecular formula . Glucose is overall the most abundant monosaccharide, a subcategory of carbohydrates. Glucose is mainly made by plants and most algae during photosynthesis from water and carbon dioxide, usi ...

as compared to the blood glucose value obtained in their meter. It was then used to quantify the clinical accuracy of blood glucose estimates generated by meters as compared to a reference value. A description of the EGA appeared in Diabetes Care in 1987. Eventually, the EGA became accepted as one of the “gold standards” for determining the accuracy of blood glucose meters. The grid breaks down a

scatterplot A scatter plot (also called a scatterplot, scatter graph, scatter chart, scattergram, or scatter diagram) is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data. ...

of a reference glucose meter and an evaluated glucose meter into five regions: *Region A are those values within 20% of the reference sensor, *Region B contains points that are outside of 20% but would not lead to inappropriate treatment, *Region C are those points leading to unnecessary treatment, *Region D are those points indicating a potentially dangerous failure to detect hypoglycemia or

hyperglycemia Hyperglycemia is a condition in which an excessive amount of glucose circulates in the blood plasma. This is generally a blood sugar level higher than 11.1 mmol/L (200 mg/dL), but symptoms may not start to become noticeable until even ...

, and *Region E are those points that would confuse treatment of hypoglycemia for hyperglycemia and vice versa.

References

{{reflist Management of diabetes

See also

References