Table 1.
Scoring rules for DAD actions within a trial
| Scenario | Action by DAD | Low sample | Non-low sample (blank, normal) |
|---|---|---|---|
| 1 | 1st alert | True positive (TP) | False positive (FP) |
| 2 | Subsequent alertsa | False negative (FN) (since not 1st alert) | False positive (FP) |
| 3 | No alert (within time) | False negative (FN) | True negative (TN) |
| 4 | No alert timeout (no action by DAD) | False negative (FN) | True negative (TN) |
In our recent study (#3) there were no scenarios for #4, i.e., all dogs gave an alert before the end of time (60 s)
DADs diabetes alert dogs
aFor “subsequent alerts” within the same trial this scoring is conservative and may be thought of as a penalty for guessing. For example, if the dog did alert on the low but only after alerting on a non-low the result is scored as miss or false negative. 12 of 60 alerts or 20% were subsequent alerts and varied by dog