TABLE 1.
Characteristics of Public Cardiac Arrests
| Characteristic† | Cardiac Arrests
|
|||
|---|---|---|---|---|
| Total (N = 2,440) | Daytime* (n = 1,252) | Evening* (n = 840) | Night* (n = 348) | |
| Age, yrs | 59.0 ± 17.5 | 60.3 ± 17.9 | 58.9 ± 16.8 | 54.6 ± 16.9 |
| Male | 58.9 ± 16.7 | 60.1 ± 17.2 | 58.7 ± 16.1 | 55.1 ± 15.7 |
| Female | 59.4 ± 20.6 | 61.1 ± 21.0 | 60.3 ± 19.5 | 52.6 ± 20.7 |
| Male | 1,979 (81.1) | 1021 (81.5) | 686 (81.7) | 272 (78.2) |
| Witnessed by bystander | 1,142 (46.8) | 590 (47.1) | 446 (53.1) | 106 (30.5) |
| Received bystander CPR | 1,019 (41.8) | 533 (42.6) | 371 (44.2) | 115 (33.0) |
| Bystander-applied AED | 191 (7.8) | 96 (7.7) | 75 (8.9) | 20 (5.8) |
| Ambulance response interval, mins | 5.88 (4.68-7.37) | 5.75 (4.60-7.20) | 5.82 (4.72-7.35) | 6.45 (5.17-7.75) |
| Initial cardiac rhythm | ||||
| Shockable‡ | 868 (35.6) | 465 (37.1) | 327 (38.9) | 76 (21.8) |
| Not shockable‡ | 1,504 (61.6) | 747 (59.7) | 494 (58.8) | 263 (75.6) |
| Survival to discharge | 361 (14.8) | 196 (15.7) | 129 (15.4) | 36 (10.3) |
Values are mean ± SD, n (%), or median (interquartile range).
Time periods were defined as daytime, 8:00 AM-3:59 PM; evening, 4:00 PM-11:59 PM; and night, 12:00 AM-7:59 AM.
Number missing from total: age (79), sex (2), witnessed by bystander (18), received bystander CPR (2), bystander-applied AED (46), arrival interval (2), initial cardiac rhythm (68), and survival (26).
Shockable includes: ventricular fibrillation, ventricular tachycardia and patients listed as shockable; not shockable includes asystole, pulseless electrical activity, patients listed as not shockable, and patients whose initial rhythm was not obtained as resuscitation was stopped before rhythm analysis by protocol due to obvious signs of death.
AED = automated external defibrillator; CPR = cardiopulmonary resuscitation.