Glucose Rate of Change Accuracy
The System’s glucose rate of change accuracy, as assessed by concurrence analysis, is presented in
Tables 4a and 4b
. For example, in the Adult study, when the Sensor glucose trend arrow indicated
that glucose was changing slowly downward (-1 to 0 mg/dL/min (
g
)), actual glucose levels in the
body were falling quickly (<-2 mg/dL/min) 1.2% of the time, falling (-2 to -1 mg/dL/min) 8.3%
of the time, changing slowly downward (-1 to 0 mg/dL/min ) 67.1% of the time, changing slowly
upward (0 to 1 mg/dL/min ) 19.7% of the time, rising (1 to 2 mg/dL/min ) 2.6% of the time, and were
rising quickly (>2 mg/dL/min ) 1.2% of the time. Digitally connected systems which do not utilize the
System’s trend arrow calculations may see different glucose rate of change accuracy.
Table 4a: Concurrence Analysis by Glucose Rate of Change (Adult; n=144)
CGM
(mg/dL/min)
YSI (mg/dL/min)
N
<-2
[-2, -1)
[-1, 0)
[0, 1]
(1, 2]
>2
<-2 (
i
)
34.4
44.9
18.3
2.2
0.3
.
323
-2 to -1 (
m
)
6.8
46.5
41.2
4.0
0.9
0.6
1090
-1 to 0 (
g
)
1.2
8.3
67.1
19.7
2.6
1.2
9389
0 to 1 (
g
)
0.9
3.4
26.0
46.9
15.5
7.3
5420
1 to 2 (
k
)
0.1
1.7
7.7
31.6
38.4
20.5
1151
>2 (
h
)
0.1
0.2
3.1
14.6
32.9
49.0
881
199