The Static Glucose-Error Grid Analysis (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. 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.

Data Management

  • Integrated spreadsheet with unlimited number of rows
  • Correct handling of missing data
  • Imports plain text format
  • Comprehensive electronic help file
  • Technical Support Call Center
  • Kovatchev BP, Gonder-Frederick LA, Cox DJ, and Clarke WL.  Evaluating the Accuracy of Continuous Glucose-Monitoring Sensors: Continuous glucose-error grid analysis illustrated by TheraSense Freestyle Navigator data.  DiabetesCare 2004;27:1922-1928. Link
System Requirements
  • PC with Windows
  • 8 Mb free space on hard disk
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