Dexcom SEVEN - Page 123

Seven
™
System User’s Guide | 119
Table 9. Percentage of Seven System readings within 20%, 30% and >40% of the YSI
Laboratory reading with data stratied in 4-hour increments after calibration and by
glucose concentration (Day 1, 4, and 7)
Time from
Calibration and
YSI Glucose Range
(mg/dL)
Number of Paired
Readings
% of Readings within
20% of YSI
% of Readings within
30% of YSI
% of Readings
greater than 40%
of YSI
40-75 mg/dL
0-4 hours 47 77% 94% 2%
4-8 hours 62 73% 90% 6%
8-12 hours 36 64% 92% 0%
76-180 mg/dL
0-4 hours 520 64% 81% 6%
4-8 hours 371 73% 89% 5%
8-12 hours 260 72% 85% 5%
181-350 mg/dL
0-4 hours 434 78% 92% 2%
4-8 hours 333 67% 90% 1%
8-12 hours 210 73% 92% 5%
351-400 mg/dL
0-4 hours 21 90% 95% 0%
4-8 hours 34 68% 91% 0%
8-12 hours 18 28% 100% 0%
Calibration cycles across days 1, 4, and 7 were evaluated and there were no significant
differences noted.
ere is minimum data to support updating calibration less frequently than every 12 hours. It
is recommended to calibrate the Seven System a minimum of every 12 hours.