Eriksson Susanne, Mellström Dan, Strandvik Birgitta
Department of Pediatrics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Acta Paediatr. 2009 Feb;98(2):374-9. doi: 10.1111/j.1651-2227.2008.01058.x. Epub 2008 Oct 1.
In adults, it is well known that gender influences bone mass, but studies in children have shown contradictory results. Also, conflicting results have been reported regarding bone mineral density in obese children.
To investigate bone parameters in healthy 8-year-old children and relate them to anthropometry and self-reported physical activity (PA).
Bone measurements were performed with dual X-ray absorptiometry in 96 children, and questionnaires were used to assess self-reported PA.
Bone mineral content and density differed by gender. Eighteen percent of the children were overweight/obese and they had higher bone mineral content and density than children with normal weight. Bone mineral apparent density (g/cm(3)) of the lumbar spine did not differ, since the vertebral size differed, as was also the case between genders. Self-reported weight-bearing PA influenced bone mass in the hip.
PA influenced bone mineralization at this age. The differences in bone mineral content and density in healthy children would mainly be explained by the differences in bone size, reflected in body height and the width of the vertebrae. This indicates the importance of determining volumetric bone mineralization in children.
在成年人中，性别影响骨量是众所周知的，但儿童研究显示出相互矛盾的结果。此外，关于肥胖儿童骨密度的研究结果也相互矛盾。
研究健康8岁儿童的骨骼参数，并将其与人体测量学和自我报告的身体活动（PA）相关联。
对96名儿童进行双能X线吸收法骨测量，并使用问卷评估自我报告的PA。
骨矿物质含量和密度因性别而异。18%的儿童超重/肥胖，他们的骨矿物质含量和密度高于体重正常的儿童。腰椎的骨矿物质表观密度（g/cm³）没有差异，因为椎体大小不同，性别之间也是如此。自我报告的负重PA影响髋部骨量。
PA在这个年龄段影响骨矿化。健康儿童骨矿物质含量和密度的差异主要由骨大小的差异来解释，这体现在身高和椎体宽度上。这表明在儿童中确定体积骨矿化的重要性。
