Freestyle Libre 14 day - Page 123

The accuracy of CGM versus YSI reference and BG reference was assessed by calculating the
percentage of System readings that were within 15%, 20%, 30% and 40% for reference values
80 mg/dL and above, and 15 mg/dL, 20 mg/dL, 30 mg/dL and 40 mg/dL for values below
80 mg/dL. The results for CGM vs. YSI reference are presented in Table 11.
Table 11: Number and Percent of Results within YSI Reference
Day Number of CGM-
Reference Pairs
Within
±15% /
±15mg/dL
Within
±20% /
±20mg/dL
Within
±30% /
±30mg/dL
Within
±40% /
±40mg/dL
Outside
±40% /
±40mg/dL
1
2563 78.2 87.0 95.6 98.7 1.3
6
2545 87.0 94.5 99.4 99.8 0.2
11
2419 82.3 90.0 98.2 99.9 0.1
14
2198 83.9 91.3 96.2 99.0 1.0
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