Table 3 Associations between SES and birth outcomes among natives-born women. Brussels vs Montreal

LBW

Belgian natives-born (N=39 381)

Canadian natives-born (N=97 509)

%

ORs (95% CI)

Adjusted ORs*

%

ORs (95% CI)

Adjusted ORs*

Maternal education

High

4.10

1

1

3.38

1

1

Intermediate

5.23

1.29 (1.15-1.44)^a

1.23 (1.09-1.39)^a

4.21

1.26 (1.16-1.36)^a

1.25 (1.15-1.36)^a

Low

6.27

1.56 (1.39-1.75)^a

1.45 (1.23-1.66)^a

6.20

1.89 (1.75-2.04)^a

1.81 (1.65-1.98)^a

Income quintile

Top

3.89

1

1

3.31

1

1

Fourth

4.76

1.23 (1.05-1.44)^b

1.16 (0.98-1.37)

4.01

1.22 (1.11-1.34)^a

1.09 (0.98-1.20)

Middle

5.02

1.30 (1.11-1.52)^b

1.16 (0.97-1.37)

4.62

1.42 (1.29-1.56)^a

1.21 (1.09-1.34)^a

Second

5.09

1.32 (1.13-1.55)^a

1.22 (1.02-1.46)^c

4.93

1.52 (1.38-1.67)^a

1.23 (1.11-1.37)^a

Bottom

5.59

1.46 (1.27-1.69)^a

1.24 (1.05-1.48)^c

5.82

1.81 (1.63-2.00)^a

1.37 (1.22-1.53)^a

PRETERM

Belgian natives-born (N=38 670)

Canadian natives-born (N=97 509)

%

ORs (95% CI)

Adjusted ORs*

%

OR’s (95% CI)

Adjusted ORs*

Maternal education

High

4.72

1

1

4.58

1

1

Intermediate

5.70

1.22 (1.09-1.35)^a

1.15 (1.02-1.29)^c

5.75

1.27 (1.19-1.36)^a

1.28 (1.19-1.38)^a

Low

6.34

1.36 (1.22-1.53)^a

1.23 (1.07-1.41)^b

7.70

1.74 (1.63-1.86)^a

1.69 (1.57-1.83)^a

Income quintile

Top

4.55

1

1

4.86

1

1

Fourth

5.16

1.14 (0.98-1.32)

1.10 (0,94-1.28)

5.66

1.17 (1.08-1.27)^a

1.05 (0.96-1.14)

Middle

5.20

1.15 (0.99-1.34)

1.07 (0.91-1.25)

5.88

1.22 (1.13-1.33)^a

1.06 (0.97-1.15)

Second

5.58

1.24 (1.06-1.44)^c

1.16 (0.97-1.37)

6.22

1.30 (1.19-1.41)^a

1.07 (0.98-1.17)^c

Bottom

5.84

1.30 (1.13-1.49)^a

1.22 (1.03-1.44)^c

6.87

1.44 (1.32-1.58)^a

1.13 (1.02-1.25)^c