Table 2 Effect of variables, including age and sex, in a logistic regression model and an interaction model

 Male sex

1.74

1.24–2.44

0.001

1.44

0.93–2.23

0.099

3.74

0.85–16.35

0.080

 Age, per year

0.96

0.95–0.97

< 0.001

0.94

0.93–0.96

< 0.001

0.95

0.93–0.98

< 0.001

 Witnessed

2.76

1.93–3.94

< 0.001

1.75

1.11–2.77

0.016

1.74

1.10–2.75

0.017

 Bystander CPR

1.85

1.37–2.52

< 0.001

0.81

0.53–1.24

0.333

0.81

0.53–1.23

0.316

 Shockable rhythm

7.40

5.36–10.22

< 0.001

4.47

2.94–6.79

< 0.001

4.48

2.95–6.82

< 0.001

 Cardiac cause

7.78

5.11–11.85

< 0.001

6.00

3.53–10.20

< 0.001

5.95

3.50–10.12

< 0.001

 Anoxic time, per minute

0.96

0.95–0.97

< 0.001

0.94

0.93–0.96

< 0.001

0.94

0.93–0.96

< 0.001

 Early coronary angiography

2.77

1.87–4.09

< 0.001

1.34

0.81–2.23

0.260

1.31

0.78–2.18

0.303

 Age × sex

0.98

0.96–1.01

0.183

 Male

1.74

1.31–2.31

0.001

1.71

1.24–2.35

0.001

2.16

0.69–6.76

0.187

 Age, per year

0.98

0.97–0.99

< 0.001

0.97

0.96–0.98

< 0.001

0.98

0.96–0.99

0.001

 Witnessed

2.23

1.69–2.95

< 0.001

1.86

1.34–2.57

< 0.001

1.86

1.34–2.57

< 0.001

 Bystander CPR

1.21

0.91–1.62

0.190

0.68

0.48–0.95

0.026

0.68

0.48–0.95

0.025

 Shockable rhythm

3.58

2.57–4.99

< 0.001

2.19

1.48–3.26

< 0.001

2.19

1.47–3.25

< 0.001

 Cardiac cause

2.86

2.18–3.76

< 0.001

2.06

1.48–2.87

< 0.001

2.05

1.47–2.86

< 0.001

 Anoxic time, per minute

0.98

0.97–0.99

< 0.001

0.98

0.97–0.98

< 0.001

0.98

0.97–0.98

< 0.001

 Early coronary angiography

2.00

1.31–3.05

0.001

1.10

0.68–1.80

0.695

1.10

0.67–1.80

0.707

 Age × sex

1.00

0.98–1.02

0.673