Table 4 Associations between SES and birth outcomes among immigrants. Brussels vs Montreal

LBW

BRUSSELS (N=55 333)

MONTREAL (N=112 463)

%

ORs (95% CI)

adjusted ORs*

%

ORs (95% CI)

adjusted ORs*

Maternal education

High

4.08

1

1

3.94

1

1

Intermediate

4.50

1.11 (0.98-1.24)

1.05 (0.92-1.20)

4.80

1.23 (1.15-1.32)^a

1.27 (1.18-1.37)^a

Low

4.12

1.01 (0.90-1.13)

1.03 (0.89-1.18)

5.62

1.45 (1.35-1.56)^a

1.57 (1.45-1.69)^a

Income Quintile

Top

3.29

1

1

4.13

1

1

Fourth

4.23

1.30 (1.01-1.67)^c

1.22 (0.93-1.59)

4.54

1.10 (0.99-1.22)

1.04 (0.93-1.16)

Middle

4.59

1.41 (1.13-1.76)^b

1.38 (1.09-1.75)^b

4.61

1.12 (1.01-1.24)

1.05 (0.94-1.17)

Second

4.10

1.26 (1.02-1.55)^c

1.28 (1.01-1.61)^c

4.53

1.10 (0.99-1.21)

1.00 (0.90-1.10)

Bottom

4.28

1.31 (1.08-1.60)^b

1.26 (1.02-1.57)^c

5.18

1.27 (1.15-1.39)^a

1.16 (1.04-1.27)^a

PRETERM

BRUSSELS (N=54 009)

MONTREAL (N=112 462)

%

ORs (95% CI)

adjusted ORs*

%

ORs (95% CI)

adjusted ORs*

Maternal education

High

4.65

1

1

4.97

1

1

Intermediate

5.16

1.11 (1.00-1.24)

1.08 (0.95-1.23)

6.19

1.26 (1.18-1.34)^a

1.28 (1.20-1.36)^a

Low

4.97

1.07 (0.96-1.19)

1.08 (0.95-1.23)

7.21

1.48 (1.39-1.58)^a

1.53 (1.43-1.64)^a

Income Quintile

Top

4.22

1

1

5.53

1

1

Fourth

4.92

1.17 (0.93-1.48)

1.17 (0.92-1.49)

5.52

0.99 (0.91-1.09)

0.93 (0.84-1.02)

Midlle

5.08

1.21 (0.99-1.48)

1.23 (0.98-1.52)

6.14

1.12 (1.02-1.22)^c

1.05 (0.96-1.15)

Second

4.76

1.13 (0.94-1.37)

1.12 (0.91-1.38)

5.97

1.08 (0.99-1.18)

0.98 (0.90-1.08)

Bottom

5.03

1.20 (1.01-1.43)^c

1.11 (0.91-1.35)

6.39

1.17 (1.07-1.26)^a

1.07 (0.98-1.16)