Dexcom G4 Platinum User Manual page 173

Hyperglycemia Alert Rate
The Alert Rate shows how often the alert is right or wrong. The True
Alert Rate is the percent of time the device alarmed when the blood
glucose level was at or above the alert setting within 15 or 30 minutes
before or after the device alarmed. The False Alert Rate is the percent
of time the device alarmed when the blood glucose level was below the
alert setting within 15 or 30 minutes before or after the device alarmed.
For example, if you set the High Glucose alert to 200 mg/dL (11.1
mmol/L) and your alarm sounds, how often can you expect your blood
sugar to actually be high? If your alarm sounds, you can expect your
blood sugar to be at or above 200 mg/dL (11.1 mmol/L) approximately
71% of the time (pediatric study) or 92% of the time (adult study) and
not be above 200 mg/dL (11.1 mmol/L) approximately 29% of the time
(pediatric study) or 8% of the time (adult study) within the 15 minute
period before or after your alarm sounds.
Hyperglycemia Detection Rate
The Detection Rate shows how often the device recognizes and alerts
you to an episode of hyperglycemia or how often it misses such an
event. The Hyperglycemia Detection Rate is the percent of time the
blood glucose level was at or above the alert setting and the device
alarmed within 15 or 30 minutes before or after the blood glucose was at
or above the alert settings. The Hyperglycemia Missed Detection Rate is
the percent of time the blood glucose was at or above the alert setting,
but the device did not alarm within 15 or 30 minutes before or after the
blood glucose was at or above the alert setting.
For example, if you set your High Glucose alert to 200 mg/dL (11.1
mmol/L), how often will your alarm alert you if your blood glucose goes
at or above 200 mg/dL (11.1 mmol/L)? If your blood sugar goes above
200 mg/dL (11.1 mmol/L), you can expect your alarm to sound 98% of
the time (pediatric study) or 97% of the time (adult study) and not to
sound approximately 2% of the time (pediatric study) or 3% of time (adult
study) within the 15 minute period before or after your blood sugar goes
above 200 mg/dL (11.1 mmol/L).
Dexcom G4 PLATINUM (Pediatric) System User's Guide | 171