Comparison of timing between calls encountering a barrier and those that did not
| Key task | No barrier (median) | Interquartile range | Barrier (median) | Interquartile range |
|---|---|---|---|---|
| Recognition of cardiac arrest | 20 s | 0 s–40 s | 1 min 30 s | 30 s–2 min 20 s |
| Time to first ventilation | 2 min 00 s | 1 min 30 s–2 min 20 s | 6 min 00 s | 4 min 15 s–7 min 35 s |
| Time to first compression | 3 min 05 s | 2 min 22 s–4 min 26 s | 7 min 10 s | 6 min 00 s–8 min 30 s |