Fiorito Laura M, Mitchell Diane C, Smiciklas-Wright Helen, Birch Leann L
Department of Human Development and Family Studies, The Pennsylvania State University, University Park, PA 16802, USA.
J Nutr. 2006 May;136(5):1281-6. doi: 10.1093/jn/136.5.1281.
We examined longitudinally the association between calcium intake and total body bone mineral content (TBBMC) in 151 non-Hispanic white girls. Intakes of dairy, energy, and calcium were assessed using three 24-h dietary recalls in girls at ages 5, 7, 9, and 11 y. We assessed their total-body bone mineral content with dual-energy X-ray absorptiometry at ages 9 and 11 y. Dairy foods comprised the major contributor (70%) to calcium intake over the 6-y period; 28% of calcium came from other foods, and 2% from supplements. By age 9 and 11 y, the majority of girls did not meet calcium recommendations. Higher calcium intake at ages 7 and 9 y was associated with higher TBBMC at age 11 y. Calcium intake at age 9 y was also positively associated with TBBMC gained from age 9 to 11 y. Calcium intake at age 11 y was not correlated with TBBMC at the same age. Relations between calcium intake and TBBMC did not differ for total calcium and for calcium from dairy sources, likely reflecting the fact that dairy products were the major source of calcium in this sample. Results from the present study provide new longitudinal evidence that calcium intake, especially calcium from dairy foods, can have a favorable effect on girls' TBBMC during middle childhood.
我们纵向研究了151名非西班牙裔白人女孩钙摄入量与全身骨矿物质含量（TBBMC）之间的关联。在5、7、9和11岁的女孩中，通过三次24小时饮食回顾来评估乳制品、能量和钙的摄入量。在9岁和11岁时，我们用双能X线吸收法评估她们的全身骨矿物质含量。在这6年期间，乳制品是钙摄入的主要来源（70%）；28%的钙来自其他食物，2%来自补充剂。到9岁和11岁时，大多数女孩未达到钙的推荐摄入量。7岁和9岁时较高的钙摄入量与11岁时较高的TBBMC相关。9岁时的钙摄入量也与9至11岁期间获得的TBBMC呈正相关。11岁时的钙摄入量与同年龄的TBBMC不相关。钙摄入量与TBBMC之间的关系在总钙和来自乳制品的钙方面没有差异，这可能反映了乳制品是该样本中钙的主要来源这一事实。本研究结果提供了新的纵向证据，表明钙摄入，尤其是来自乳制品的钙，在童年中期对女孩的TBBMC可能有有利影响。
