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Table 3 Association of sociodemographic factors with prepregnancy BMI category (multinomial regression model stratified on parity) (n = 3149)

From: Sociodemographic factors and pregnancy outcomes associated with prepregnancy obesity: effect modification of parity in the nationwide Epifane birth-cohort

 

Primiparous (n = 1335)

Multiparous (n = 1814)

Underweight

Overweight

Obesity

Underweight

Overweight

Obesity

n = 107

n = 214

n = 114

n = 130

n = 357

n = 197

OR

[95% CI]

OR

[95% CI]

OR

[95% CI]

OR

[95% CI]

OR

[95% CI]

OR

[95% CI]

Maternal age (years)

 18-24

2.07

[0.97-4.39]

0.80

[0.48-1.32]

1.27

[0.57-2.85]

3.03

[1.57-5.87]

0.73

[0.39-1.37]

0.98

[0.49-1.97]

 25-29

1.55

[0.85-2.82]

0.69

[0.46-1.04]

2.09

[1.13-3.87]

1.28

[0.80-2.05]

1.39

[1.01-1.93]

1.11

[0.72-1.72]

 30-34

1

 

1

 

1

 

1

 

1

 

1

 

  ≥ 35

0.84

[0.30-2.35]

0.70

[0.37-1.33]

2.01

[0.94-4.28]

0.74

[0.42-1.32]

1.04

[0.73-1.48]

1.45

[0.93-2.25]

Maternal country of birth

 France (mainland and overseas)

1

 

1

 

1

 

1

 

1

 

1

 

 Maghreb and Sub-Saharan Africa

1.09

[0.34-3.49]

0.99

[0.37-2.67]

0.81

[0.25-2.61]

0.54

[0.17-1.67]

1.31

[0.78-2.20]

0.77

[0.43-1.38]

 Europe, Asia, America, Oceania

3.16

[1.52-6.54]

0.75

[0.34-1.67]

0.78

[0.22-2.79]

1.21

[0.50-2.89]

0.49

[0.22-1.09]

1.64

[0.79-3.41]

Maternal education

 Primary school

3.73

[1.10-12.68]

1.77

[0.53-5.91]

0.69

[0.09-5.38]

3.21

[1.01-10.17]

4.59

[1.89-11.16]

6.30

[2.40-16.57]

 Junior high school

1.42

[0.74-2.72]

0.96

[0.56-1.62]

1.59

[0.83-3.07]

0.54

[0.29-1.00]

1.42

[0.96-2.10]

2.89

[1.81-4.64]

 High school

0.93

[0.49-1.78]

1.52

[1.01-2.29]

2.22

[1.33-3.73]

0.79

[0.46-1.35]

0.98

[0.68-1.41]

1.86

[1.18-2.93]

 University

1

 

1

 

1

 

1

 

1

 

1

 

Maternal occupation

 Farmer, craftswoman, merchant, entrepreneur

0.92

[0.25-3.39]

0.31

[0.08-1.14]

1.15

[0.26-5.04]

0.83

[0.22-3.14]

0.25

[0.08-0.75]

0.71

[0.17-2.86]

 Management profession

0.97

[0.50-1.87]

0.61

[0.37-1.00]

1.12

[0.51-2.49]

0.64

[0.35-1.19]

0.67

[0.42-1.06]

0.47

[0.22-1.05]

 Intermediate profession

1

 

1

 

1

 

1

 

1

 

1

 

 Manual worker

0.78

[0.27-2.23]

0.49

[0.21-1.14]

0.84

[0.34-2.05]

0.97

[0.46-2.04]

0.71

[0.41-1.20]

1.42

[0.83-2.45]

 Unemployed

0.55

[0.18-1.76]

1.82

[0.84-3.93]

1.85

[0.75-4.57]

0.30

[0.08-1.08]

1.29

[0.70-2.39]

1.48

[0.76-2.88]

 Missing

1.36

[0.74-2.51]

0.67

[0.40-1.13]

1.57

[0.92-2.69]

1.39

[0.84-2.30]

0.94

[0.67-1.33]

0.96

[0.62-1.50]

Smoking before/during pregnancy pregnancy)

 No smoking before or during

1

 

1

 

1

 

1

 

1

 

1

 

 Smoking before, but not during

0.92

[0.51-1.66]

0.91

[0.60-1.38]

0.77

[0.42-1.42]

0.99

[0.55-1.80]

0.47

[0.30-0.73]

0.61

[0.36-1.05]

 Smoking before and during

1.24

[0.67-2.27]

0.50

[0.31-0.79]

0.56

[0.30-1.05]

1.27

[0.74-2.16]

0.99

[0.68-1.43]

0.65

[0.40-1.05]

Antenatal classes

 Attended

1

 

1

 

1

 

1

 

1

 

1

 

 Not attended

1.25

[0.70-2.22]

1.30

[0.83-2.03]

1.36

[0.80-2.31]

0.99

[0.65-4.52]

1.02

[0.76-1.38]

1.77

[1.16-2.72]

  1. The model was also adjusted for gestational weight gain, gestational diabetes mellitus, hypertensive complications, delivery mode and infant’s birth weight (see Table 4)
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