Controls n = 855

SGA cases n = 364

n

%^

n

%^

Unadjusted

OR [95% CI]

Maternal characteristics

Maternal age (years)

≤20

13

1

10

3

1.73 [0.74 - 4.04]

21- 30

333

39

148

41

1.00 [Reference]

31- 40

495

58

198

54

0.90 [0.70 - 1.16]

>40

13

1

7

2

1.21 [0.47 - 3.10]

Partner

Yes

816

96

342

94

1.00 [Reference]

No

34

4

20

5

1.40 [0.80 - 2.47]

Education

Primary/middle school

246

29

114

38

1.00 [Reference]

High school

417

49

176

59

0.91 [0.69 - 1.21]

University

191

22

68

23

0.77 [0.54 - 1.10]

Employment during the last three months

No

240

29

105

30

1.00 [Reference]

Yes

587

71

244

70

0.95 [0.72 - 1.25]

Reproductive history

Newborn sex

Males

413

48

157

43

1.00 [Reference]

Females

442

52

207

57

1.29 [1.00 - 1.66]

Parity

Primiparae

424

50

220

61

1.00 [Reference]

Multiparae

428

50

138

38

0.62[0.48 - 0.80]

Previous preterm deliveries§

No

386

91

108

79

1.00 [Reference]

Yes

38

9

29

21

2.73 [1.61 - 4.63]

Previous SGA§

No

343

96

79

81

1.00 [Reference]

Yes

15

4

19

19

5.50 [2.68 - 11.30]

Miscarriages§

No

285

67

75

55

1.00 [Reference]

Yes

140

33

62

45

1.68 [1.14 - 2.49]

Stillbirth§

No

418

99

134

98

1.00 [Reference]

Yes

5

1

3

2

1.87 [0.44 - 7.93]

Diabetes

No

838

99

348

99

1.00 [Reference]

Yes

10

1

4

1

0.96 [0.30 - 3.09]

Hypertension

No

820

96

345

95

1.00 [Reference]

Yes

32

4

19

5

1.41 [0.79 - 2.52]