Dexcom SEVEN - Page 118

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™
CONTINUOUS GLUCOSE MONITORING SYSTEM
Table 5. Seven System and YSI Blood Glucose Accuracy by Glucose Concentration
Glucose Range (mg/dL) Number of Paired Readings Mean Percent Difference
Mean Absolute Percent
Difference
Overall (40-400 mg/dL) 2,323 -8% 17%
40-60 36 10% 23%
61-80 172 3% 23%
81-180 1,077 -8% 17%
181-300 865 -10% 15%
301-350 119 -10% 14%
351-400 47 -13% 14%
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). e 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).
ese accuracy measures are summarized in Table 5 below and are based on 2,323 paired
glucose measurements: