Dexcom SEVEN User Manual page 118

These accuracy measures are summarized in Table 5 below and are based on 2,323 paired
glucose measurements:
table 5. Seven System and ySi Blood Glucose Accuracy by Glucose Concentration
Glucose Range (mg/dL)
Overall (40-400 mg/dL)
40-60
61-80
81-180
181-300
301-350
351-400
Table 5 shows that the Seven System, on average, reads 3-10% higher than the YSI at
glucose levels of 40-80 mg/dL and reads 10-13% lower, on average, than the YSI at glucose
concentrations of 301-400 mg/dL (Mean Percent Difference). The Seven System reads,
on average, 23% different than the YSI at glucose levels of 40-80 mg/dL and, on average,
14% different than the YSI readings at glucose levels of 301-400 mg/dL (Mean Absolute
Percent Difference).
114 | SEVEN CONTINUOUS GLUCOSE MONITORING SYSTEM
™
Number of Paired Readings
2,323
36
172
1,077
865
119
47
Mean Percent Difference
-8%
10%
3%
-8%
-10%
-10%
-13%
Mean Absolute Percent
Difference
17%
23%
23%
17%
15%
14%
14%