Table 3 Multivariable logistic Stage 1 model for catchments of birthing versus non-birthing facilities

Birth numbers (divided by 10)

45.1

1

0.000

1.50

[1.33-1.69]

Travel time to C-section

16.4

4

0.003

  < 1 h (ref)

1.00

 1-2 h

16.2

1

0.000

28.7

[5.59-148]

 2-3 h

0.19

1

0.664

1.44

[0.28-7.49]

 3-4 h

0.45

1

0.504

2.19

[0.22-21.7]

 4+ hours

0.68

1

0.408

2.15

[0.35-13.1]

SES (IRSD deciles)

6.44

3

0.092

 1 most disadvantaged

4.50

1

0.034

0.07

[0.01-0.82]

 2-4 (ref)

1.00

 5

0.09

1

0.760

0.80

[0.18-3.45]

 6-7 less disadvantaged

1.39

1

0.238

0.19

[0.01-3.00]

Jurisdiction

23.98

6

0.001

 NSW (ref)

1.00

 QLD

0.01

1

0.919

0.92

[0.20-4.20]

 VIC

11.4

1

0.001

26.9

[3.98-182]

 SA

10.7

1

0.001

20.5

[3.37-124]

 WA

1.34

1

0.246

2.81

[0.49-16.1]

 NT

0.36

1

0.550

0.36

[0.01-10.4]

 TAS

5.30

1

0.021

0.03

[0.00-0.59]

Aboriginal & Torres Strait Islander

12.6

4

0.014

  < 2.5% (ref)

1.00

 2.5-5%

9.70

1

0.002

14.1

[2.67-74. 9]

 5-10%

0.66

1

0.415

2.03

[0.37-11.1]

 10-25%

5.99

1

0.014

15.9

[1.74-146]

  > 25%

3.69

1

0.055

21.2

[0.94-479]