Dexcom G4 Professional User Manual page 202

or greater than 40 mg/dL (2.2 mmol/L) or 40% were then calculated.
For example, if the CGM reads 100 mg/dL, it is between 81-180 mg/dL
(4.5-10.0 mmol/L) range, you can expect the CGM readings to be within
20% of the SMBG values 78% time.
Table 12. System Difference to SMBG within CGM
Glucose Ranges
CGM Glucose
Ranges mg/dL
(mmol/L)
Overall
*40-60
(2.2-3.3)
*61-80
(3.4-4.4)
81-180
(4.5-10.0)
181-300
(10.1-16.7)
301-350
(16.7-19.4)
351-400
(19.4-22.2)
* F or CGM ≤ 80 mg/dL (4.4 mmol/L), the differences in mg/dL (mmol/L)
are included instead of percent differences (%).
NOTE: CGM readings are within 40 to 400 mg/dL (2.2-22.2 mmol/L),
inclusive.
Overall, the System reads, on average, 0.4% lower (Mean Percent
Difference) than SMBG values and 14.0% absolute different (Mean
Absolute Percent Difference) than the SMBG values. The Median
Mean
Number
Percent
of Paired
Difference
CGM-SMBG
(%)
7508 -0.4
-9.3
731
(-0.5)
-1.0
968
(-0.1)
3141 1.4
1960 -0.7
450 -0.7
258 5.0
Dexcom G4 PLATINUM Professional System User's Guide
Mean
Median
Absolute
Percent
Percent
Difference
Difference
(%)
(%)
-1.4 14.0
-8.0 11.7
(-0.4) (0.7)
1.0 10.7
(0.1) (0.6)
0.0 14.2
-2.8 13.0
-2.6 10.5
3.0 11.9
Median
Absolute
Percent
Difference
(%)
11.0
8.0
(0.4)
8.0
(0.4)
11.0
10.3
8.6
8.6
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