Skip to main content
. 2007 Mar 21;11(2):R39. doi: 10.1186/cc5726

Table 5.

Variables associated with survival at 24 hours

Variables Odds ratio 95% confidence interval p value
Shockable rhythm (VF, VT) 1.27 1.08–1.58 0.02
Arrival time 1.32a 1.24–1.68 0.01
Witnessed arrest 7.64 2.32–22.42 < 0.001
Bystander CPR 4.84 2.10–10.48 < 0.001
Initial petCO2 b 18.65 6.14–32.27 < 0.001
Average petCO2 b 2.86 1.42–4.65 < 0.001
Final petCO2 b 2.26 1.21–4.13 0.012
Initial MAPb 1.06 0.82–1.43 0.46
Final MAPb 1.79 1.28–3.12 0.009
Vasopressin 1.34 1.14–1.94 0.024
Period 2c 1.68 1.20–2.94 0.008

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.