Comparison of accuracy for factory calibrated and user calibrated sensor systems
| Factory calibrated | Require daily fingerprick calibrations | ||||
|---|---|---|---|---|---|
| Accuracy measure | FreeStyle Libre | Glucoday28 | Medtronic REALTime2930 | Dexcom G4 Platinum4 | Dexcom G4 Platinum with software 505 algorithm4 |
| Mean absolute relative difference, % | 13.9 | 13.9 | 18.0, 19.0 | 15 | 13 |
| Percentage of results in zone A of CEG | 83.8 | NA | NA, 66.7 | 80 | 86 |
| Percentage of results in zones A and B of CEG | 99.4 | 98.6 | 94.5, 92.3 | 99 | 100 |
CEG, consensus error grid; NA, not available.