Table 12.
Variables associated with survival in cardiac arrest
| Variables | OR (95% CI) | P value |
| Initial rhythm (VF/VT) | 1.86 (1.26–3.11) | <0.001 |
| Arrival time | 1.39 (1.33–1.60) | 0.01 |
| Witness | 9.98 (2.89–34.44) | <0.0001 |
| Bystander CPR | 5.05 (2.24–11.39) | <0.0001 |
| Intial PetCO2 | 1.93 (1.48–3.75) | 0.018 |
| Average PetCO2 | 2.31 (1.45–4.86) | <0.001 |
| 10 min PetCO2 | 2.11 (1.27–4.16) | 0.001 |
| 15 min PetCO2 | 2.47 (1.33–5.21) | <0.001 |
| 20 min PetCO2 | 3.85 (1.71–8.34) | <0.001 |
| Final PetCO2 | 2.37 (1.67–3.37) | <0.001 |
CI, confidence interval; CPR, cardiopulmonary resuscitation; OR, odds ratio; PetCO2, partial pressure of end-tidal carbon dioxide; VF, ventricular fibrillation; VT, ventricular tachycardia.