For example, if you set the High Glucose alert to 200 mg/dL and your alert sounds,
how often can you expect your blood glucose to actually be high? Based on results for
adults in the G7 Study (Table 5-C), when your alert sounds, you can expect your blood
glucose to be at or above 200 mg/dL approximately 96.3% of the time and not be
above 200 mg/dL approximately 3.7% of the time within the 15-minute period before
or after your alert sounds.
Hyperglycemic detection rate
The detection rate is the percentage of time the device alerted within 15 minutes
before or after the blood glucose level was at or above the alert setting. The missed
detection rate is the percentage of time the device did not alert within 15 minutes
before and after the blood glucose level was at or above the alert setting.
For example, if you set the High Glucose alert to 240 mg/dL, and your blood glucose
rises above 240 mg/dL, how often can you expect your device to correctly alert you?
Based on results for pediatrics in the study (Table 5-D), if your blood glucose was at or
above 240 mg/dL, you can expect your alert to sound approximately 96.1% of the time
within 15 minutes and an alert not to sound approximately 3.9% of the time.
Table 5-C. Hyperglycemic alert and detection rate evaluations (adults, n=308)
Hyperglycemic
alert level
(mg/dL)
Alerts Detections
# of alerts
(n)
True alert
rate (%)
False alert
rate (%)
# of
events (n)
Correct
detection rate
(%)
Missed
detection rate
(%)
120 56,899 97.0 3.0 24,147 98.5 1.5
140 48,771 96.8 3.2 21,222 98.2 1.8
180 35,465 96.4 3.6 16,454 97.8 2.2
200 29,941 96.3 3.7 14,521 97.1 2.9
220 25,145 96.2 3.8 12,799 96.5 3.5
240 20,970 95.6 4.4 11,244 95.9 4.1
300 8,884 90.1 9.9 6,630 88.7 11.3
142
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