SEVEN PLUS User’s Guide | 111
minutes of the low blood glucose event 27% of the time (“Missed Alert Rate***”). Also at the
90 mg/dL alert level, 25% of the time the SEVEN PLUS may falsely alert you that your glucose
level is at or less than 90 mg/dL when your actual blood glucose reading is above 90 mg/dL at
that time.
Table 2. Hypoglycemic Alert Evaluation
SEVEN PLUS
Alert Level
True Alert
Rate*
False Alert
Rate**
Missed Alert
Rate***
60 mg/dL 59 % 61 % 41%
70 mg/dL 57% 46 % 44 %
80 mg/dL 64 % 29 % 36 %
90 mg/dL 73 % 25 % 27 %
* True Alert Rate is the % of time when the blood glucose level was at or below the alert setting and the alert
sounded.
** False Alert Rate is the % of time when the device alarmed but the blood glucose level was above the alert
setting.
*** Missed Alert Rate is the % of time when the device failed to alarm when the blood glucose level was at or
below the alert setting.
The High Glucose Alert
Estimates of how well the adjustable High Glucose Alert performs are
presented in the table below. For example, if you set the High Glucose Alert to 200 mg/dL,
the SEVEN PLUS should alert you 81% of the time within 5 minutes when your blood glucose
levels rise above 200 mg/dL (True Alert). Additionally, 7% of the time when the alert sounds,
the glucose level may actually be below 200 mg/dL (False Alert) at this time.
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