Categories are never, 0-<3 months, 3-<6 months, 6-<12 months, 12-<23 months, and 23 months or more. On the x-axis, results are placed on the mean lifetime duration of breastfeeding 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.