User's Guide

Dexcom G6 System User Guide
317
Appendix F: Technical Information
Precision of System Readings
A subset of randomly selected subjects wore two Systems at the same time (n=67).
This was to look at how similarly two Systems function on the same subject (sensor
precision) under the same condition. Precision was evaluated by comparing the glucose
readings from the two Systems worn on the same subject at the same time on the
same location.
Table 9 shows that the readings from the two sensors generally agreed with each
other. For adults (18+ years old) on abdomen, absolute relative difference (ARD)
between the two Systems was 8.9% with coefficient of variation (CV) of 7.9%. For
pediatrics (2-5 years old) on upper buttocks, paired ARD was 5.2% with CV of 4.8%.
Table 9. Precision by Wear Location
Adults
(18+ YO)
Abdomen
Pediatrics
(6-17 YO)
Abdomen
Pediatrics
(6-17 YO)
Upper
Buttocks
Pediatrics
(2-5 YO)
Upper
Buttocks
CGM-CGM
Matched Pairs (n)
23,019 1,255 12,230 2,638
Paired Absolute
Difference (mg/dL)
14.0 14.5 16.4 9.4
Paired Absolute
Relative
Difference (%)
8.9 9.4 10.7 5.2
Coefficient of
Variation (%)
7.9 7.6 8.5 4.8
LBL014003 Rev XXX Artwork, G6 CGM System User Guide US.indd 317 2/5/19 9:27 AM