Table 1 Personal characteristics of the participating primiparous pregnant women.

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