Table 2 Odds ratios from logistic regression analysis

Treated at TH center

0.90

0.61, 1.31

1.70

1.19, 2.42

Year 2010

0.83

0.67, 1.03

0.81

0.61, 1.06

Witnessed arrest

1.44

1.17, 1.79

1.77

1.32, 2.38

Defibrillation by EMS

1.31

1.06, 1.62

1.54

1.16, 2.04

Shockable rhythm

1.15

0.82, 1.59

1.34

0.91, 1.97

Response time (dispatch to arrival on-scene)

(reference: less than 4 minutes)

 4-8 minutes

0.98

0.73, 1.31

0.56

0.39, 0.79

 More than 8 minutes

0.88

0.65, 1.18

0.50

0.35, 0.70

Female sex (reference: male sex)

0.91

0.74, 1.13

0.89

0.66, 1.19

Age in years (reference: less than 50)

 50-65

0.53

0.40, 0.70

0.61

0.43, 0.86

 66-80

0.52

0.37, 0.74

0.49

0.32, 0.76

 81 and above

0.41

0.28, 0.61

0.19

0.11, 0.34

Race/ethnicity (reference: White)

 Black

0.92

0.69, 1.22

0.83

0.57, 1.21

 Hispanic

0.92

0.61, 1.39

0.77

0.43, 1.37

 Asian/Pacific Islander

1.31

0.77, 2.22

0.80

0.34, 1.90

 Other non-white

1.41

0.94, 2.13

1.24

0.74, 2.08

Expected primary payer (reference: Medicare)

 Medicaid

1.37

0.83, 2.27

0.81

0.37, 1.75

 Private

1.30

0.97, 1.75

1.38

0.95, 2.01

 Self-pay/uninsured

0.89

0.62, 1.28

0.61

0.37, 1.00

 Other

1.09

0.54, 2.19

1.57

0.72, 3.41

Number of hospital beds (reference: less than 200)

 200-399

2.19

1.24, 3.88

1.54

0.98, 2.41

 400 and above

2.83

1.33, 6.05

3.32

1.98, 5.59