User's Guide

Dexcom G6 System User Guide
310
Appendix F: Technical Information
Sensor Stability
Sensors can be worn for up to 10 days. Performance was estimated by calculating
the percentage of G6 readings within 15 mg/dL or 15% (15/15%), 20 mg/dL or 20%
(20/20%), and 40 mg/dL or 40% (40/40%), of the YSI values at the beginning (Day
1, 2), middle (Day 4, 5) and end (Day 7, 10) of the G6 lifecycle. For blood glucose
values less than or equal to 70 mg/dL, the absolute difference in mg/dL between the
two glucose results was calculated. For values greater than 70 mg/dL, the absolute
difference (%) relative to the YSI values was calculated. In addition, the mean absolute
relative difference (MARD) shows the average amount the sensor readings differ from
the YSI glucose. The MARD values included in Table 6-A and 6-B show consistent
accuracy and sensor stability over the 10-day life of the sensor.
Table 6-A. Sensor Stability Relative to YSI (Accuracy over Time
1
) (Adults; n=159)
Wear
Period
Number
of paired
CGM-YSI
MARD
(%)
Percent
within
15/15% YSI
(%)
Percent
within
20/20% YSI
(%)
Percent
within
40/40% YSI
(%)
Beginning 6,696 10.9 76.5 88.0 99.6
Middle 6,464 9.2 84.3 94.6 99.8
End 6,169 9.6 82.3 92.4 99.8
1
CGM readings are within 40-400 mg/dL, inclusive.
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