Table 2.
Gender and age stratified characteristics of patients with out-of-hospital cardiac arrest.
| Characteristic | Females 12–49 (n = 1213) | Males 12–49 (n = 2242) | Females ≥50 (n = 6440) | Males ≥50 (n = 9503) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | % | 95% CI | n | % | 95% CI | n | % | 95% CI | n | % | 95% CI | |
| Race/ethnicity* | ||||||||||||
| Black | 454 | 37.4 | 34.7–40.1 | 658 | 29.3 | 27.5–31.2 | 2029 | 31.5 | 30.4–32.6 | 2292 | 24.1 | 23.3–25.0 |
| Hispanic | 76 | 6.3 | 4.9–7.6 | 197 | 8.8 | 7.6–10.0 | 273 | 4.2 | 3.7–4.7 | 491 | 5.2 | 4.7–5.6 |
| White | 368 | 30.3 | 27.7–32.9 | 759 | 33.9 | 31.9–35.9 | 2444 | 38.0 | 36.8–39.1 | 4048 | 42.6 | 41.6–43.6 |
| Other | 21 | 1.7 | 1.0–2.5 | 50 | 2.2 | 1.6–2.8 | 165 | 2.6 | 2.2–2.9 | 252 | 2.7 | 2.3–3.0 |
| Unknown | 294 | 24.2 | 578 | 25.8 | 1529 | 23.7 | 2420 | 25.5 | ||||
| Witnessed by bystander* | 535 | 44.1 | 41.3–46.9 | 1121 | 50.0 | 47.9–52.1 | 2894 | 44.9 | 43.7–46.2 | 4740 | 49.9 | 48.9–50.9 |
| Unknown | 1 | 0.1 | 1 | 0.1 | 1 | 0.02 | 1 | 0.01 | ||||
| Witnessed by EMS* | 116 | 9.6 | 7.9–11.2 | 218 | 9.70 | 8.5–11.0 | 753 | 11.7 | 10.9–12.5 | 999 | 10.5 | 9.9–11.1 |
| Unknown | 0 | 0 | 1 | 0.1 | 0 | 0 | 0 | 0 | ||||
| Arrest in public location* | 133 | 11.0 | 9.2–12.7 | 520 | 23.2 | 21.4–24.9 | 416 | 6.5 | 5.9–7.1 | 1414 | 14.9 | 14.2–15.6 |
| Unknown | 36 | 3.0 | 2.0–3.9 | 85 | 3.8 | 3.0–4.5 | 115 | 1.8 | 1.5–2.1 | 265 | 2.8 | 2.5–3.1 |
| Bystander CPR* | 365 | 30.1 | 27.5–32.7 | 708 | 31.6 | 29.7–33.5 | 2180 | 33.9 | 32.7–35.0 | 3253 | 34.2 | 33.3–35.2 |
| Public AED used* | 314 | 25.9 | 23.4–28.4 | 663 | 29.6 | 27.7–31.5 | 1689 | 26.2 | 25.2–27.3 | 2826 | 29.7 | 28.8–30.6 |
| Unknown | 0 | 0 | 0 | 0 | 3 | 0.05 | 2 | 0.02 | ||||
| Initial rhythm* | ||||||||||||
| VF/VT, unknown shockable | 288 | 23.7 | 21.3–26.1 | 696 | 31.0 | 29.1–33.0 | 975 | 15.1 | 14.3–16.0 | 2648 | 27.9 | 27.0–28.8 |
| Pulseless electrical activity | 208 | 17.1 | 15.0–19.3 | 292 | 13.0 | 11.6–14.4 | 1436 | 22.3 | 21.3–23.3 | 1770 | 18.6 | 17.8–19.4 |
| Asystole | 576 | 47.5 | 44.7–50.3 | 1018 | 45.4 | 43.3–47.5 | 3196 | 49.6 | 48.4–50.8 | 3935 | 41.4 | 40.4–42.4 |
| Unknown, unshockable | 141 | 11.6 | 9.8–13.4 | 236 | 10.5 | 9.3–11.8 | 826 | 12.8 | 12.0–13.6 | 1143 | 12.0 | 11.4–12.7 |
| Unknown | 0 | 0 | 0 | 0 | 7 | 0.1 | 7 | 0.08 | ||||
| ROSC* | 430 | 35.4 | 32.8–38.1 | 631 | 28.10 | 26.3–30.0 | 2243 | 34.8 | 33.7–36.0 | 3158 | 33.2 | 32.3–34.2 |
| Unknown | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | ||||
| Survival to hospital discharge* | 141 | 11.6 | 9.8–13.4 | 250 | 11.20 | 9.8–12.5 | 447 | 6.9 | 6.3–7.6 | 909 | 9.6 | 9.0–10.2 |
Abbreviations: EMS = emergency medical services; CPR = cardiopulmonary resuscitation; AED = automated external defibrillator; VT = ventricular tachycardia; VF = ventricular fibrillation; ROSC = return of spontaneous circulation.
*
p < 0.01.