Table 1.
Demographic and clinical characteristics.
| Men (n=10,023) |
Women (n=5,561) |
|
|---|---|---|
| Age (years)* | 66 (54–78) | 72 (57–83) |
| Witnessed arrest | 5,235 (52%) | 2,557 (46%) |
| Public location | 1,867 (19%) | 468 (8.4%) |
| AED applied | 234 (2.3%) | 87 (1.6%) |
| AED shock delivered | 108 (1.1%) | 31 (0.6%) |
| Bystander CPR | 3,804 (38%) | 1,982 (36%) |
| First known rhythm of VF/VT | 2,881 (29%) | 863 (16%) |
| An rhythm of VF/VT | 4,341 (43%) | 1,598 (29%) |
| Dispatch to ALS crew arrival (minutes)* | 8.0 (5.7–11.1) | 8.0 (5.6–11.1) |
| Dispatch to first EMS CPR (minutes)* | 8.5 (6.7–11) | 8.8 (6.9–11.3) |
| Dispatch to first EMS rhythm captured (minutes)* |
10.1 (8.2–12.9) | 10.5 (8.5–13.3) |
| Prehospital interventions | ||
| IV attempt | 8,890 (89%) | 4,707 (85%) |
| IO attempt | 717 (7.2%) | 587 (11%) |
| IV or IO success | 8,891 (89%) | 4,727 (85%) |
| Advanced airway | 8,060 (81%) | 4,412 (80%) |
| Adrenaline | 8,255 (83%) | 4,472 (81%) |
| Atropine | 6,676 (67%) | 3,704 (67%) |
| Amiodarone or lidocaine | 2,226 (22%) | 686 (12%) |
*
Data presented as median (interquartile range)
AED = Automated external defibrillator; CPR = Cardiopulmonary resuscitation;
VF/VT = Ventricular fibrillation/ventricular tachycardia; ALS = Advanced life support;
EMS = Emergency medical services