Methods: Detailed breastfeeding information and anthropometric data were obtained for 65,256 children enrolled in the
Jiaxing Birth Cohort at 1, 3, and 6 mo of age. Hemoglobin was measured in 25,549 children at 12 mo and in 32,770 children
between the ages of 48 and 71 mo. Anemia was defined as hemoglobin concentrations