Table 1.
General characteristics of study population.
| Variables | Missing | stats | |
|---|---|---|---|
| Age | Mean ± SD | 0 (0.0%) | 68.5 ± 15.4 |
| Sex | Female | 0 (0.0%) | 4798 (34.6%) |
| Male | 9066 (65.4%) | ||
| Diabetes | No | 0 (0.0%) | 10,731 (77.4%) |
| Yes | 3133 (22.6%) | ||
| Hypertension | No | 0 (0.0%) | 9455 (68.2%) |
| Yes | 4409 (31.8%) | ||
| Bystander witness | No | 0 (0.0%) | 6057 (43.7%) |
| Yes | 7807 (56.3%) | ||
| Bystander CPR | No CPR | 655 (4.7%) | 6032 (45.7%) |
| Standard CPR | 434 (3.3%) | ||
| Compression-only CPR | 6743 (51.0%) | ||
| AED | No | 49 (0.4%) | 12,662 (91.7%) |
| Yes | 1153 (8.3%) | ||
| Place | Non-residence | 238 (1.7%) | 4929 (36.2%) |
| Residence | 8697 (63.8%) | ||
| Initial ECG | Non-shockable | 613 (4.4%) | 10,803 (81.5%) |
| Shockable | 2448 (18.5%) | ||
| DA-CPR | No | 288 (2.1%) | 3579 (26.4%) |
| Yes | 9997 (73.6%) | ||
| CPC* | Poor | 0 (0.0%) | 12,740 (91.9%) |
| Good | 1124 (8.1%) | ||
| Survival to discharge | No | 0 (0.0%) | 12,184 (87.9%) |
| Yes | 1680 (12.1%) |
CPR Cardiopulmonary resuscitation; AED Automated electrical defibrillator; ECG Electrocardiography; DA-CPR Dispatcher-assisted CPR; CPC Cerebral Performance Category.
*A CPC score of 1 or 2 was considered a good neurological outcome, and a score of 3, 4, or 5 was considered a poor neurological outcome.