Table 2 Relationship between stressful life events/social health issues, perceived discrimination and social and obstetric characteristics

Maternal age

≤24 years

4.48

(3.4-5.9)

2.00

(1.6-2.5)

≥25 years

1.00 ref

1.00 ref

Adjusted household income (AUD)

< $20,000

2.95

(2.4-3.7)

1.50

(1.3-1.8)

$20,000- $40,000

1.00 ref

1.00 ref

> $40,000

0.58

(0.4-0.8)

0.84

(0.7-1.0)

Educational attainment

Completed Yr 12

1.00 ref

1.00 ref

Did not complete Yr 12

1.83

(1.5-2.3)

1.31

(1.1-1.5)

Indigenous status

Not Aboriginal and/or Torres Strait Islander

100 ref

1.00 ref

Aboriginal and/or Torres Strait Islander

2.79

(1.1-6.9)

1.32

(0.6-2.8)

Maternal country of birth

Australia

1.00 ref

1.00 ref

Overseas - English speaking

0.85

(0.5-1.3)

1.12

(0.8-1.5)

Overseas - Non English speaking

0.90

(0.7-1.2)

1.06

(0.8-1.3)

Relationship status

Married

1.00 ref

1.00 ref

Living with partner

2.51

(2.0-3.1)

1.59

(1.3-1.9)

Single/divorce/separated

15.0

(9.2-24.4)

1.92

(1.4-2.6)

Maternal pre-pregnant BMI

Underweight (< 18.5)

2.08

(1.4-3.2)

1.44

(1.0-2.0)

Normal weight (18.5-24.9)

1.00 ref

1.00 ref

Overweight (25-29.9)

1.12

(0.9-1.4)

1.08

(0.9-1.3)

Obese (≥30)

1.33

(1.0-1.7)

1.25

(1.0-1.5)

Smoking during pregnancy

Non-smoker

1.00 ref

1.00 ref

Quit in pregnancy

2.20

(1.6-3.0)

1.21

(0.9-1.5)

Smoking throughout pregnancy

4.24

(3.2-5.6)

1.86

(1.5-2.3)

Medical risk

Lower risk

1.00 ref

1.00ref

Higher risk

1.92

(1.6-2.3)

1.38

(1.2-1.6)

Gestation

≥37 weeks

1.00 ref

1.00 ref

< 37 weeks

1.32

(0.9-1.9)

1.15

(0.9-1.5)

Infant birthweight

≥2500 grams

1.00 ref

1.00 ref

< 2500 grams

2.06

(1.3-3.1)

1.32

(1.0-1.8)