Table 3 Results of logistic regression analyses for 1-month outcomes

Bystander type

Family

Reference

Reference

Non-family

1.26

1.19-1.33

<0.001

1.47

1.34-1.60

<0.001

Sex

Male

Reference

Reference

Female

0.95

0.89-1.01

0.076

0.96

0.88-1.05

0.373

Age category

65–74 years

Reference

Reference

75–84 years

0.79

0.75-0.85

<0.001

0.63

0.58-0.70

<0.001

85 years and over

0.54

0.50-0.58

<0.001

0.40

0.36-0.46

<0.001

Bystander CPR

Non

Reference

Reference

Chest compression only

1.34

1.25-1.43

<0.001

1.84

1.67-2.04

<0.001

M-to-M ventilation only

1.21

0.97-1.53

0.098

1.62

1.16-2.27

0.005

Conventional CPR

1.39

1.29-1.50

<0.001

1.78

1.59-2.00

<0.001

PAD

Not performed

Reference

Reference

Performed

2.87

2.29-3.60

<0.001

4.55

3.53-5.86

<0.001

Defibrillation by EMS

Not performed

Reference

Reference

Performed

2.91

2.74-3.09

<0.001

3.88

3.55-4.23

<0.001

Call−arrival of EMS interval (1-min increase)

0.89

0.88-0.90

<0.001

0.86

0.85-0.88

<0.001