User`s guide
Dexcom G4 PLATINUM Professional System User’s Guide | 195
Table 6. Hyperglycemic Alert Evaluation
Hyperglycemic
Alert Level mg/dL
(mmol/L)
True
Alert
Rate
False
Alert
Rate
Hyperglycemia
Detection Rate
Hyperglycemia
Missed Detection
Rate
120 (6.7) 95% 5% 98% 2%
140 (7.8) 94% 6% 97% 3%
180 (10.0) 92% 8% 97% 3%
200 (11.1) 92% 8% 97% 3%
220 (12.2) 91% 9% 95% 5%
240 (13.3) 91% 9% 94% 6%
300 (16.7) 82% 18% 86% 14%
Hyperglycemia Alert Rate
The Alert Rate shows how often the alert is right or wrong. The True
AlertRateisthe%oftimethedevicealarmedwhenthebloodglucose
level was at or above the alert setting within 15 minutes before or after
thedevicealarmed.TheFalseAlertRateisthe%oftimethedevice
alarmed when the blood glucose level was below the alert setting within
15 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
92%ofthetimeandnotbeabove200mg/dL(11.1mmol/L)
approximately8%ofthetimewithinthe15minuteperiodbeforeorafter
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