Table 1 Characteristics of pregnant women in both study I (N = 295) and study II (N = 304)

Demographics

Age

   Younger than 25

28

11,4

29

12,8

   26-30

94

38,4

112

36,8

   31-35

98

40,0

120

39,6

   Above 36

25

10,2

33

10,7

Marital status

   With partner

245

100

298

98

Education level

   Low

15

5

18

6

   Middle

136

46

131

43

   High

144

49

155

51

Currently working outside the home

226

92,2

273

89,8

Obstetric history

Parity

   Primiparous

131

44,4

135

44,4

   Multiparous

164

55,6

169

55,6

Previous abortion

63

25,7

88

28,9

Term of gestation in weeks

26,56

9,45

6 -41

28,61

9,12

6 -41

Life style

   Any alcohol intake

19

7,7

21

6,9

   Any smoking

15

6,1

20

6,6