Breast-feeding and adherence to infant feeding guidelines do not influence bone mass at age 4 years.

摘要

The impact of variations in current infant feeding practice on bone mineral accrual is not known. This study examined the associations between duration of breast feeding and compliance with infant dietary guidelines and later bone size and density at age 4 yr. At total of 599 (318 boys) mother-child pairs were recruited from the Southampton Women's Survey. Duration of breast feeding was recorded and infant diet was assessed at 6 and 12 months using FFQ. At 6 and 12 months the most important dietary pattern, defined by principal component analysis, was characterized by high consumption of vegetables, fruits and home-prepared foods. As this was consistent with infant feeding recommendations, it was denoted the 'infant guidelines' pattern. At age 4 yr, children underwent assessment of whole-body bone size and density using a Hologic Discovery dual-energy X-ray absorptiometry instrument. Correlation methods were used to explore the relationships between infant dietary variables and bone mineral. There was no association between duration of breast feeding in the 1st yr of life and 4-yr bone size or density. 'Infant guidelines' pattern scores at 6 and 12 months were also unrelated to bone mass at age 4 yr. Wide variations were observed in current infant feeding practice, but these variations were not associated with differences in childhood bone mass at age 4 yr.