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A comparison between the total Dutch female population and the study population |
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| Total Dutch population |
Study population |
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|
|
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| Period 2001 |
Period 2002 |
Period 2003 |
Period 2001 (N = 2892) |
Period 2002 (N = 3567) |
Period 2003 (N = 1061) |
|
|
|
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| 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 |
|
|
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| Smoking |
%* |
%* |
%* |
% |
% |
% |
| - Current/before pregnancy |
35.7 |
34.0 |
33.3 |
29.7 |
29.3 |
31.7 |
|
|
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| Pregnancy-related factors |
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|
|
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| Mean age mother |
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| - 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 |
|
|
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| 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 |
|
|
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| 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 |
|
|
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| Multiple pregnancy |
% |
% |
% |
% |
% |
% |
| - Twin |
1.9 |
1.9 |
1.8 |
1.0 |
0.9 |
1.1 |
|
* Age-group comparable to study-population | ||||||
Bastiaanssen et al. BMC Public Health 2005 5:1 doi:10.1186/1471-2458-5-1 |
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