Change in assistance response characteristics over time. At the end of the first period of the study (1999–2007) 36 AEDs were placed. The remaining 171 AEDs were placed over the second period of the study (2008–2016)
| From 1999 to 2007 | From 2008 to 2016 | P value | |
| SCA occurred in on-site AEDs centres | 1 (12%) | 14 (77%) | 0.003 |
| Shockable rhythm | 5 (62%) | 16 (88%) | 0.28 |
| AED connection time (min) | 7.3+4 | 3.8+2 | 0.007 |
| Survival rate | 25% | 72% | 0.03 |
| First response by a lay bystander | 1 (12%) | 8 (44%) | 0.13 |
AED, automated external defibrillator; SCA, sudden cardiac arrest.