Table 1. Patient and EMS characteristics from out-of-hospital cardiac arrest during meeting and non-meeting days.
| Meeting days (n = 20 143) |
Non-meeting days (n = 38 860) |
P | |
| Men, n (%) | 11 586 (57.5) | 22 372 (57.6) | 0.904 |
| Age, years, median (IQR) | 77 (65–85) | 77 (65–85) | 0.518 |
| Age group, n (%) | 0.379 | ||
| 18–39 years | 919 (4.6) | 1677 (4.3) | |
| 40–64 years | 3837 (19.0) | 7440 (19.1) | |
| ≥65 years | 15 387 (76.4) | 29 743 (76.5) | |
| Etiology, n (%) | 0.504 | ||
| Cardiac | 11 436 (56.8) | 22 174 (57.1) | |
| Non-cardiac | 8707 (43.2) | 16 686 (42.9) | |
| External cause | 3565 (40.9) | 6859 (41.1) | |
| Respiratory disease | 1058 (12.2) | 2152 (12.9) | |
| Cerebrovascular disease | 861 (9.9) | 1693 (10.1) | |
| Malignant tumor | 650 (7.5) | 1239 (7.4) | |
| Other | 2573 (29.6) | 4743 (28.4) | |
| Type of witness status, n (%) | 0.089 | ||
| None | 13 226 (65.7) | 25 242 (65.0) | |
| Arrests witnessed by bystanders | 6917 (34.3) | 13 618 (35.0) | |
| Family member | 4384 (63.4) | 8671 (63.7) | |
| Friend | 271 (3.9) | 535 (3.9) | |
| Colleague | 235 (3.4) | 459 (3.4) | |
| Passer-by | 338 (4.9) | 683 (5.0) | |
| Other | 1689 (24.4) | 3270 (24.0) | |
| First documented rhythm, n (%) | 0.743 | ||
| VF | 1598 (7.9) | 3033 (7.8) | |
| PEA | 3979 (19.8) | 7759 (20.0) | |
| Asystole | 14 566 (72.3) | 28 068 (72.2) | |
| Type of bystander CPR, n (%) | 0.915 | ||
| No CPR | 11 615 (57.7) | 22 470 (57.8) | |
| Chest compression-only CPR | 6022 (29.9) | 11 593 (29.8) | |
| Conventional CPR | 2506 (12.4) | 4797 (12.3) | |
| Shocks by public-access AEDs, n (%) | 156 (0.8) | 312 (0.8) | 0.712 |
| Dispatcher instruction, n (%) | 9384 (46.6) | 18 363 (47.3) | 0.124 |
| Intravenous fluid, n (%) | 5079 (25.2) | 9633 (24.8) | 0.257 |
| Epinephrine administration, n (%) | 1643 (8.2) | 3162 (8.1) | 0.934 |
| Advanced airway management, n (%) | 8918 (44.3) | 17 227 (44.3) | 0.894 |
| Day of week, n (%) | 0.008 | ||
| Weekdays | 13 588 (67.5) | 25 793 (66.4) | |
| Weekends | 6555 (32.5) | 13 067 (33.6) | |
| Time of day, n (%) | 0.683 | ||
| On-duty hours (8:00 am to 4:59 pm) | 8519 (42.3) | 16 503 (42.5) | |
| Off-duty hours (5:00 pm to 7:59 am) | 11 624 (57.7) | 22 357 (57.5) | |
| EMS resuscitation times, min, median (IQR) | |||
| EMS response time (call to contact with a patient) | 8 (6–10) | 8 (6–10) | 0.866 |
| Hospital arrival time (call to hospital arrival) | 30 (24–38) | 30 (24–38) | 0.669 |
AED, automated external defibrillator; CPR, cardiopulmonary resuscitation; EMS, emergency medical service; IQR, interquartile range; PEA, pulseless electrical activity; VF, ventricular fibrillation.