Freestyle Libre 2 Manuel D'utilisation page 64

minutes before or after the alarm.
False Alarm Rate
Tells you: Did you get a low glucose alarm that you shouldn't have?
Definition: Percentage of time the alarm issued and blood glucose was not below the alarm level within
15 minutes before or after the alarm.
Detection Rate
Tells you: When you were low, did you get a low glucose alarm?
Definition: Percentage of time blood glucose was below the alarm level and the alarm issued within 15
minutes before or after the glucose event.
Missed Detection Rate
Tells you: When you were low, did you miss a low glucose alarm?
Definition: Percentage of time blood glucose was below the alarm level and the alarm didn't issue
within 15 minutes before or after the glucose event.
For example, the Adult study found that for a Low Glucose alarm level set to 3.9 mmol/L:
86.0% of the time a low glucose alarm was received when blood glucose was indeed below the alarm
level but 14.0% of the time a low glucose alarm was received when blood glucose wasn't below the
alarm level.
89.3% of the time blood glucose was below the alarm level and a low glucose alarm was appropriately
issued but 10.7% of the time the glucose event was missed and no alarm was issued.
Table 5a: Low Glucose Alarm Performance (Adult; n=144) Table 5a: Low Glucose Alarm Performance (Adult; n=144)
Table 5b: Low Glucose Alarm Performance (Paediatric*; n=129) Table 5b: Low Glucose Alarm Performance (Paediatric*; n=129)
* Includes children 6–17 years of age. No YSI measurements were obtained for children 4–5 years of age.
High Glucose Alarm Performance High Glucose Alarm Performance
Tables 5c and 5d Tables 5c and 5d display the percentages for these parameters:
True Alarm Rate
Tells you: When you got a high glucose alarm, were you actually high?
Definition: Percentage of time the alarm issued and blood glucose was above the alarm level within 15
minutes before or after the alarm.
False Alarm Rate
ART41758-100_rev-A 3:14pm 18-JAN-2021