Table 2

Results of multivariable logistic regression on imputed data set for NTCA survival to hospital admission or survival to receiving hospital discharge outcomes

Covariate	Survival to hospital admission		Survival to hospital discharge
Covariate	Effect	P value	Effect	P value
(Intercept)	−0.860	<0.001	−1.20	<0.001
Age	0.0105	0.090	0.0204	0.068
Age²	−0.000144	0.0061	−0.000483	<0.001
Male sex	−0.167	0.0025	0.297	0.021
Arrest witnessed	0.752	<0.001	0.79	<0.001
Response time (min)	−0.0356	<0.001	−0.108	<0.001
Shockable initial rhythm	1.27	<0.001	2.512	<0.001
Air ambulance	0.676	<0.001	0.527	0.0023
Response time: bystander CPR	−0.00445	0.57	0.04	0.049
Successfully intubated	0.122	0.039	−0.77	<0.001
Epinephrine administered	−0.81	<0.001	−2.15	<0.001

Models were simplified by sequential elimination of terms and interactions that were not significant for at least one of the two outcomes. Significant covariate estimates are denoted in bold assuming a significance level of 5% and estimates are log odds.
CPR, cardiopulmonary resuscitation; NTCA, non-traumatic cardiac arrest.