TABLE.
Characteristics of out-of-hospital cardiac arrest in the Resuscitation Outcomes Consortium, stratified by site. Sites listed in order of descending case volume. Includes only cases without missing values for all characteristics.
| Characteristic | Site 1 (N=3,633) |
Site 2 (N=2,893) |
Site 3 (N=2,155) |
Site 4 (N=1,532) |
Site 5 (N=1,386) |
Site 6 (N=1,224) |
Site 7 (N=1,123) |
Site 8 (N=765) |
Site 9 (N=662) |
Site 10 (N=392) |
TOTAL (N=15,765) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Age (years, mean) | 69.8 | 67.9 | 67.6 | 64.6 | 66.8 | 64.7 | 63.7 | 66.1 | 66.2 | 64.5 | 67.1 |
| Median (IQR) | 73 (59,82) | 70 (57,80) | 70 (57,80) | 65 (52,79) | 68 (55,80) | 65 (53,78) | 63 (51,77) | 67 (55,79) | 68 (54,79) | 65 (53,79) | 69(55,80) |
| Sex (male, %) | 62.6 | 65.4 | 68.9 | 58.2 | 63.4 | 64.1 | 58.9 | 64.4 | 60.8 | 57.4 | 63.4 |
| Public Location (%) | 15.1 | 13.7 | 19.6 | 12.5 | 19.6 | 17.2 | 13.4 | 17.1 | 14.5 | 14.4 | 15.7 |
| Witnessed Arrest | |||||||||||
| Not Witnessed (%) | 51.0 | 49.6 | 44.6 | 27.9 | 51.8 | 23.9 | 51.6 | 39.9 | 39.9 | 20.2 | 43.9 |
| EMS Witnessed (%) | 9.4 | 10.1 | 9.5 | 4.7 | 9.5 | 4.5 | 11.7 | 13.1 | 6.8 | 12.0 | 9 |
| Bystander Witnessed (%) | 38.5 | 39.5 | 44.7 | 19.5 | 37.3 | 50.1 | 36.7 | 40.1 | 41.8 | 44.4 | 38.7 |
| Unknown (%) | 1.1 | 0.8 | 1.2 | 48.0 | 1.4 | 21.6 | 0.0 | 6.9 | 11.5 | 23.5 | 8.4 |
| Bystander Resuscitation | |||||||||||
| CPR (%) | 28.0 | 26.9 | 37.6 | 19.5 | 49.1 | 45.4 | 21.8 | 31.7 | 36.9 | 25.8 | 31.5 |
| AED Use (%) | 1.4 | 2.0 | 1.2 | 1.4 | 3.4 | 3.2 | 2.3 | 6.0 | 8.3 | 3.1 | 2.4 |
| Unknown status (%) | 1.5 | 1.6 | 1.5 | 52.3 | 1.9 | 24.3 | 0.0 | 15.2 | 14.7 | 41.3 | 10.3 |
| Initial Rhythm (VF/VT, %)* | 22.2 | 26.4 | 31.7 | 16.6 | 31.0 | 34.8 | 21.1 | 28.2 | 22.1 | 28.6 | 25.9 |
| EMS Response Time | |||||||||||
| (9-1-1 to arrival on-scene; minutes, mean) |
6.6 | 6 | 7.5 | 5.9 | 5.3 | 5.2 | 4.4 | 5.1 | 6.5 | 7.2 | 6.1 |
| Median (IQR) | 6 (5,7) | 6 (4,7) | 6 (5,8) | 5 (4,7) | 5 (4,6) | 5 (4,6) | 4 (3,5) | 4 (3,6) | 6 (4,8) | 6 (4,8) | 5 (4,7) |
*
Based upon those with known initial ECG rhythm (total n = 15,293). IQR=interquartile range. EMS=Emergency Medical Services. CPR=cardiopulmonary resuscitation. AED=automated external defibrillator. VF/VT = ventricular fibrillation or pulseless ventricular tachycardia.