User`s guide

158 | Dexcom G4 PLATINUM Continuous Glucose Monitoring System
14
Table 3-A. Concurrence of CGM Readings and YSI
Values (Original Study)
CGM
(mg/dL)
YSI (mg/dL)
Row percentage of matched pairs in each CGM glucose range
< 40
40-
60
61-
80
81-
120
121-
160
161-
200
201-
250
251-
300
301-
350
351-
400
> 400
Number
of Paired
CGM-YSI
< 40 6% 48% 37% 7% 1% 0% 0% 0% 0% 0% 0% 155
40-60 4% 49% 36% 11% 1% 0% 0% 0% 0% 0% 0% 512
61-80 0% 22% 51% 24% 1% 0% 0% 0% 0% 0% 0% 781
81-120 0% 2% 17% 66% 13% 1% 0% 0% 0% 0% 0% 1706
121-160 0% 0% 1% 25% 60% 13% 2% 0% 0% 0% 0% 1492
161-200 0% 0% 0% 2% 28% 53% 16% 2% 0% 0% 0% 1240
201- 250 0% 0% 0% 0% 3% 21% 51% 21% 3% 1% 0% 1181
251- 300 0% 0% 0% 0% 0% 4% 19% 49% 24% 3% 0% 1018
301- 350 0% 0% 0% 0% 0% 0% 3% 28% 51% 16% 1% 775
351-
400
0% 0% 0% 0% 0% 0% 3% 10% 43% 38% 7% 447
> 400 0% 0% 0% 0% 0% 0% 1% 6% 21% 57% 15% 248
Concurrence of System and Laboratory Reference
Tables 3-A and 3-B are categorized by ranges of CGM glucose
readings. This table describes, for each range of CGM glucose
readings, what percentage of paired YSI values were in the same
glucose range (shaded) or in glucose ranges above and below the
paired CGM readings. For example, based on the Software 505 Study,
when CGM readings are within 81 to 120 mg/dL, you can expect your
blood glucose levels are within 81 to 120 mg/dL 72% of time.