Table 6.
Variables associated with hospital discharge
| Variables | Odds ratio | 95% confidence interval | p value |
| Shockable rhythm (VF, VT) | 1.34 | 1.22–1.92 | 0.03 |
| Arrival time | 1.46a | 1.26–2.12 | 0.01 |
| Witnessed arrest | 6.84 | 2.27–20.67 | < 0.001 |
| Bystander CPR | 4.45 | 1.98–9.48 | < 0.001 |
| Initial petCO2 b | 1.61 | 1.28–2.64 | 0.008 |
| Average petCO2 b | 1.47 | 1.22–1.93 | 0.014 |
| Final petCO2 b | 2.67 | 1.83–3.68 | < 0.001 |
| Initial MAPb | 1.02 | 0.91–1.32 | 0.54 |
| Final MAPb | 1.39 | 1.23–2.13 | 0.01 |
| Vasopressin | 1.12 | 0.82–1.33 | 0.42 |
| Period 2c | 1.32 | 1.19–1.95 | 0.03 |
aValue proportional to each one-minute decrease in arrival time; bValues proportional to each increase by 1.33 kPa (10 mm Hg); cCPR performed in the period from November 2003 to April 2006 (period 1: January 2000 to November 2003). CPR, cardiopulmonary resuscitation; MAP, mean arterial blood pressure; petCO2, end-tidal pressure of carbon dioxide.