Table 2 The association between known risk factors (including Migration Status) and SGA

Marital Status

In a Relationship ^r

1

Not in a Relationship

1.08 (1.04 to 1.11) ***

Age Group (years)

<  20

0.90 (0.84 to 0.97) **

20 to 35 ^r

1

35+

1.07 (1.04 to 1.10) ***

Parity

Primiparous

2.01 (1.97 to 2.06) ***

Multiparous ^r

1

BMI

Underweight

1.61 (1.54 to 1.69) ***

Healthy Weight ^r

1

Overweight

0.77 (0.76 to 0.79) ***

Smoking before 20wks

Yes

1.12 (1.04 to 1.18) **

No ^r

1

Smoking after 20wks.

Yes

2.25 (2.10 to 2.41) ***

No ^r

1

Gestational Age at 1st Visit

Before 11 weeks ^r

1

12 to 23 weeks

1.09 (1.07 to 1.12) ***

24 weeks /no care

1.25 (1.21 to 1.30) ***

Type 1 Diabetes

Yes

0.35 (0.27 to 0.45) ***

No ^r

1

Type 2 Diabetes

Yes

0.74 (0.59 to 0.93) *

No ^r

1

Pre-existing Hypertension

Yes

1.27 (1.16 to 1.38) ***

No ^r

1

Gestational Diabetes - Diet

Yes

1.04 (1.00 to 1.08) *

No ^r

1

Gestational Diabetes - Insulin

Yes

0.83 (0.78 to 0.87) ***

No ^r

1

Preeclampsia

Yes

1.45 (1.37 to 1.54) ***

No ^r

1

HELLP Syndrome

Yes

1.72 (1.42 to 2.08) ***

No ^r

1

Suspected FGR

Yes

10.47 (10.19 to 10.76) ***

No ^r

1

Migration Status

Australia Born Women ^r

1

Migrant Women

1.76 (1.73 to 1.80) ***