Agreement with GM Glucose Levels
The accuracy of GM versus YSI reference was also 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 when glucose levels are
assigned using the GM readings. The results are presented in
Table 2
. Overall 83.6% of results were
within ±20 mg/dL / 20% of the YSI reference.
Table 2: Number and Percent of Results within YSI Reference
GM
Glucose
Level
(mg/dL)
Number
of GM-
Reference
Pairs
Within
±15% /
±15 mg/dL
Within
±20% /
±20 mg/dL
Within
±30% /
±30 mg/dL
Within
±40% /
±40 mg/dL
Outside
±40% /
±40 mg/dL
Overall
12323
71.7
83.6
94.9
98.2
1.8
40-50
28
17.9
28.6
50.0
71.4
28.6
51-80
586
54.1
70.6
88.2
94.2
5.8
81-180
6685
72.2
83.0
94.2
97.9
2.1
181-300
4449
73.9
86.2
96.9
99.2
0.8
301-400
541
70.1
86.7
97.2
98.9
1.1
401-500
34
55.9
88.2
97.1
100.0
0.0
46