Table 1 Personal characteristics of the participating primiparous pregnant women.
| Variable | N | Mean (SD) | % |
|---|---|---|---|
| Age (yr) | 323 | 28 (4) | |
| Pre-pregnancy BMI (kg/m2) | 315 | 23.2 (3.7) | |
| Weight increase during pregnancy (%/week) | 315 | 0.61 (0.25) | |
| Breast-fed during infancy (months) | 170 | 4 (3) | |
| Smoking during pregnancy | 321 | 20 | |
| Alcohol during pregnancy | 323 | 17 | |
| Childhood in a fishermen/angler family | 213 | 12 | |
| Lived on east coast of Sweden ≥5 yr | 223 | 25 | |
| Born in a Nordic country | 323 | 95 | |
| Years of education | 323 | ||
| ≤11 years | 28 | ||
| 12–13 years | 21 | ||
| 14–16 years | 25 | ||
| ≥16 years | 25 |