Table 1
Currently available continuous glucose monitoring systems
| Medtronic Guardian connect | Dexcom G6 and G5 | Medtrum A6 | Freestyle Libre system | |
| Stand-alone systems |
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| MARD Score | 10.5% (8.7% on buttocks) | G6-7.7% for children. Licenced for therapy adjustment | No data for paediatrics (9.1% in adults) | 9%—paediatrics Licenced for therapy adjustment |
| Sensor glucose measurement | Every 5 min | 5 min | 2 min | Every 1 min when flashed |
| Licence | All ages for the sensor | 2 years and above | 2 years and above | 4 years and above |
| Duration | 7 days | 10 days | 7 days | 14 days |
| Calibration | Yes | No | Yes | No |
| Alarms | Yes | Yes | Yes | yes (new Libre 2 has inbuilt alarms) |
| Charging | Transmitter should be charged after 6 days of usage | Receiver needs to be charged every 2 days | Transmitter needs charging after each sensor session (every 7 days) | A fully charged reader battery will last up to 7 days |
| Waterproofing | Transmitter is waterproof. The sensor is waterproof up to 12 feet for up to 24 hours | Transmitter is waterproof for 8 feet | Waterproof up to a depth of 8 feet for up to 60 min | Reader is not water-resistant. Sensor is water-resistant for up to 3 feet (1 m) for about 30 min |
MARD, mean absolute relative difference.