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Table 1 Confusion matrix of the alarm (heart rate < 150 bpm)

From: A mobile phone based alarm system for supervising vital parameters in free moving rats

  Rat Killed Rat Survived  
Alarm sent to mobile phone 27 6 33
Alarm NOT sent to mobile phone 2 57 59
  29 63 92
  1. Cave: The six surviving rats that triggered an alarm, released 10 alarms in total!
  2. Positive predictive value (rat dead, alarm sent to mobile phone): 93.1%
  3. Negative predictive value (rat alive, no alarm): 90.5%