Monitor function results from the 10-week study period
| Monitor function checked | Outcome | |
|---|---|---|
| N/N (%) (lower 97.5% confidence bound) | ||
| Sensitivity | Positive predictive value | |
| Inhaler actuations | ||
| Total | 2558/2560 (99.9%) (99.7) | 2558/2558 (100.0%) (99.9) |
| Low-use actuations | 1600/1600 (100.0) (99.8) | |
| High-use actuations | 958/960 (99.8) (99.2)* | |
| Inhaler insertion and removal | ||
| Insertion | 29/30 (96.7) (82.8)† | 29/29 (100.0) (88.1) |
| Removal | 9/10 (90.0) (55.5) | 9/9 (100.0) (66.4) |
Sensitivity is the proportion of diary actuations electronically recorded by the monitor expressed as a percentage. Positive predictive value is the proportion of monitor recorded actuations that were recorded in the diary expressed as a percentage (lower 95.7% confidence bound).
All data from week 6 was 1 h discrepant (to within 7 min), in keeping with the time prior to the start of the New Zealand daylight savings period.
*Monitor 8 and monitor 17 each missed one actuation during high use.
†In monitor 9, there was a failure to record one insertion and one removal.