Categories are never, 0-<1 months, 1-<3 months, 3-<6 months, and 6 months or more. On the x-axis, results are placed on the mean duration of breastfeeding per child within category. Adjusted for age at study entry, centre, level of attained education, smoking status, number of livebirths, high blood pressure, HDL cholesterol, total cholesterol, history of diabetes mellitus, and BMI.