User`s guide

Dexcom G4 PLATINUM Professional System User’s Guide | 199
the System over the entire 7-day period after calibration. For example,
93.5%ofSystemsprovidedbetween1,811and1,992validglucose
readings(ormorethan76%oftheexpectednumberofreadings).
Adjusted within each system wear-day, the System provided an average
of97%ofallexpectedglucosereadings(288)asseeninTable10.
Table 9. Number of Readings Provided by Each Sensor
Over 7- Days
% of Total Possible
Readings Provided
Total
Readings
Provided
(Min-Max)
% of Systems Providing
that Number of Readings
0-25% 167- 491 1.9%
26-50% 719-914 3.7%
51-75% 1267-1267 0.9%
76-100% 1811-1992 93.5%
Table 10. System Readings Within Wear Days
Statistic Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7
All Days
(N = 108)
Mean 98% 98% 98% 98% 97% 99% 95% 97%
Median 100% 100% 100% 100% 100% 100% 100% 100%
STD 5% 3% 9% 8% 10% 3% 11% 8%
Agreement and Accuracy Relative to SMBG
During the study, agreement between the System and blood glucose
values is also characterized using paired System and SMBG results.
The System and SMBG values were compared by pairing the
comparative SMBG value to a System glucose reading that occurred
immediately after the SMBG was collected. These results characterize
the performance patients expect during real-time use of the system in