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Table 2 A comparison between the total Dutch female population and the study population

From: Etiology and prognosis of pregnancy-related pelvic girdle pain; design of a longitudinal study

 

Total Dutch population

Study population

 

Period 2001

Period 2002

Period 2003

Period 2001

(N = 2892)

Period 2002

(N = 3567)

Period 2003

(N = 1061)

BMI

%*

%*

%*

%

%

%

   - Underweight (<18.5)

5.3

4.9

3.0

2,9

3,2

3,5

   - Normal weight (18.5–24.9)

70.3

71.9

71.2

66,8

68,5

70,4

   - Overweight (25.0–29.9)

18.5

17.8

18.0

21,3

20,3

18,9

   - Extreme overweight (> = 30)

5.9

5.4

7.8

9,1

8,1

7,2

Smoking

%*

%*

%*

%

%

%

   - Current/before pregnancy

35.7

34.0

33.3

29.7

29.3

31.7

Pregnancy-related factors

Mean age mother

      

   - Total pregnancies

30.8

30.9

31.0

31.1

31.7

32.4

   - First pregnancies

29.2

29.2

29.3

29.6

30.2

30.9

Child

%

%

%

%

%

%

   - Boy

51.2

51.3

51.4

51.0

52.2

50.5

   - Girl

48.8

48.7

48.6

49.0

47.8

49.5

Number of pregnancies:

%

%

%

%

%

%

   - First

46.3

45.8

45.5

44,6

41,0

41.0

   - Second

36.3

36.7

36.9

35,6

37,2

37.3

   - Third

12.3

12.5

12.6

13,6

14,7

13.9

   - Fourth or more

5.1

5.0

5.0

6,2

7,1

7.8

Multiple pregnancy

%

%

%

%

%

%

   - Twin

1.9

1.9

1.8

1.0

0.9

1.1

  1. * Age-group comparable to study-population