The SG-EGA (Clarke Error Grid Analysis) is a Windows-based, statistical program designed for use by the diabetes technology industry in the evaluation of continuous glucose monitoring devices.

Clarke Error Grid Analysis is a method for evaluating the clinical accuracy of blood glucose meters.  Its underlying clinical decision model is that blood glucose levels <70 mg/dL should be raised, levels of 70-180 mg/dL maintained, and levels >180 mg/dL lowered for best glycemic management.  Its analysis is based on the premise that a blood glucose meter is acceptable to the extent that it can be used to make clinically correct decisions.  Paired blood glucose measurements, one from a laboratory reference analyzer and the other from a hand-held blood glucose meter, are evaluated and placed in one of five zones, based on a comparison of the clinical decisions that would be made using the blood glucose meter vs. the laboratory reference.

The SG-EGA was originally designed by Dr. William Clarke at the University of Virginia in Charlottesville, VA, USA and is now licensed to Epsilon for distribution.

The price of one SG-EGA CD-ROM is $230 plus shipping.  Please call +1.434.975.0097 ext. 5314 or email gkongable@epsilongroup.com to place an order.

Boris P. Kovatchev, Linda A. Gonder-Frederick, Daniel J. Cox, and William L. Clarke. Evaluating the Accuracy of Continuous Glucose-Monitoring Sensors: Continuous glucose-error grid analysis illustrated by TheraSense Freestyle Navigator data. Diabetes Care 2004;27:1922-1928.

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