Background variables

N

Control

Intervention

p-value

Age

<30

177

40.9

35.9

0.538

31 - 33

138

29

32.9

>34

138

30.1

31.1

Employment

Full-time

306

63.5

75.3

0.021

Part-time

64

15.1

12.7

Other

81

21.4

12

Marital status

Cohabiting with the child’s father

434

94.4

98.2

0.005

Single

2

0

1.2

Other family situation

17

5.6

0.6

Previous children

First child

277

62

60.5

0.307

Second child

144

32.7

30.5

Third child or more

30

5.3

9

Alcohol use 3 months prior to current pregnancy

Rarely/never

151

31.6

37.3

0.055

Not more than 1 time/week

200

48.9

37.3

None

360

79.4

79.6

Tobacco use 3 months prior to current pregnancy

1 - 9 cigarettes/day

45

8.4

12.6

0.225

10 cigarettes/day

37

9.8

5.4

Snuff

11

2.4

2.4