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 |