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Table 5 Variables associated with survival at 24 hours

From: Effects of epinephrine and vasopressin on end-tidal carbon dioxide tension and mean arterial blood pressure in out-of-hospital cardiopulmonary resuscitation: an observational study

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

  1. 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.