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Characteristics of the participants: pregnant women aged 19–43 years (n 162), Reykjavik, Iceland, November 2007 to February 2009
| Mean | sd | |
|---|---|---|
| Age (years) | 30·5 | 5·5 |
| Height (cm) | 167·6 | 6·4 |
| Weight, pre-pregnancy (kg) | 71·5 | 13·6 |
| BMI, pre-pregnancy (kg/m2) | 25·5 | 4·7 |
| n | % | |
| Ever smoked | 66 | 40·7 |
| Currently smoke | 10 | 6·2 |
| Underweight, pre-pregnancy | 1 | 0·6 |
| Normal weight, pre-pregnancy | 93 | 57·4 |
| Overweight/obese, pre-pregnancy | 68 | 41·9 |
| Nullipara | 56 | 34·6 |
| Primipara | 55 | 34·0 |
| Multipara | 51 | 31·5 |
