What is the Consensus Error Grid (CEG)?
In clinical studies of the FreeStyle Libre System, an evaluation tool used was a Consensus Error Grid (CEG), a scatter chart divided into 5 performance zones. For the FreeStyle Libre system, 99.9% of the readings fell within the two desirable zones of the grid (Zones A and B) for adults, and 100% of the readings fell within the two desirable zones of the grid (Zones A and B) for pediatrics. Results in Zones A and B have no effect on the clinical action (clinical accuracy) or the action would have little effect on the clinical outcome.1
Reference
1. Alva S, Bailey T, Brazg R, et al. Accuracy of a 14-Day Factory-Calibrated Continuous Glucose Monitoring System With Advanced Algorithm in Pediatric and Adult Population With Diabetes. J Diabetes Sci Technol. 2022;16(1):70-77.