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Table 4 Logistic regressions for 1-month survival rates and neurologically favorable 1-month survival rates

From: Population density, call-response interval, and survival of out-of-hospital cardiac arrest

 

1-month survival

Neurologically favorable 1-month survival

 

OR

95%CI

p

OR

95%CI

p

Sex

          

   Male

1.00

    

1.00

    

   Female

0.95

0.90

-

1.00

0.040

0.87

0.80

-

0.93

<0.001

Age (yrs)

          

   ≤59

1.00

    

1.00

    

   60 - 69

0.83

0.72

-

0.96

0.011

0.65

0.54

-

0.80

<0.001

   70 - 79

0.57

0.49

-

0.65

<0.001

0.32

0.26

-

0.40

<0.001

   80 - 89

0.37

0.32

-

0.43

<0.001

0.23

0.18

-

0.29

<0.001

   ≥90

0.27

0.21

-

0.34

<0.001

0.15

0.10

-

0.22

<0.001

Cause of arrest

          

   Cardiac

1.00

    

1.00

    

   Non-cardiac

0.81

0.78

-

0.85

<0.001

0.49

0.45

-

0.53

<0.001

First aid by bystander

          

   None

1.00

    

1.00

    

   CPR without AED use

1.52

1.45

-

1.60

<0.001

1.99

1.85

-

2.13

<0.001

   CPR with AED use

5.73

4.80

-

6.84

<0.001

9.60

7.89

-

11.7

<0.001

Seasons

          

   Summer (June-August)

1.00

    

1.00

    

   Autumn (September-November)

0.95

0.88

-

1.01

0.103

0.94

0.86

-

1.04

0.224

   Winter (December-February)

0.84

0.78

-

0.89

<0.001

0.81

0.74

-

0.90

<0.001

   Spring (March-May)

0.85

0.80

-

0.91

<0.001

0.80

0.73

-

0.88

<0.001

Population density (/km2)

          

   Very low (<250)

1.00

    

1.00

    

   Low (250-999)

1.14

0.99

-

1.30

0.067

1.03

0.85

-

1.25

0.776

   Middle-low (1,000-2,999)

1.34

1.18

-

1.53

<0.001

1.29

1.08

-

1.55

0.006

   Middle-high (3,000-5,999)

1.53

1.35

-

1.74

<0.001

1.29

1.08

-

1.55

0.006

   High (6,000-9,999)

1.63

1.42

-

1.85

<0.001

1.39

1.15

-

1.67

0.001

   Very high (≥10,000)

1.64

1.44

-

1.87

<0.001

1.47

1.22

-

1.77

<0.001

The proportion of neighborhood elderly people (aged ≥65 yrs; %)

          

   <15

1.00

    

1.00

    

   15 - 25

0.89

0.80

-

0.98

0.025

0.94

0.82

-

1.08

0.384

   >25

0.82

0.72

-

0.94

0.005

0.81

0.68

-

0.96

0.017

  1. CPR: cardiopulmonary resuscitation, AED: automated external defibrillators, OR: odds ratio, CI: confidence interval