河北省农村青少年人群骨密度调查

Investigation of bone density in children

本文对河北省农村７～１９岁青少年人群５４８５人用单光子骨矿仪测量挠骨远端１／３处骨密度，同时测量身高、体重。结果男、女性别间７～１４岁身高、７～１５岁体重与骨密度差异不显著（ｐ＞０．０５），其后男性均高于女性，差异显著（ｐ＜０．０５）；两性骨密度与年龄、身高、体重均呈明显正相关（均为ｐ＜０．００１），性别间相关系数比较，男性大于女性，差别显著（ｐ＜０．０１）；两性在青春前期和青春中期身高、体重和骨密度增长率均高于学龄期和青春后期；生活在不同地区男、女性骨密度比较，沿海区高于平原区，平原区高于山区，差别均有显著意义（均为ｐ＜０．００１）。由于青少年生长发育较快，特别在青春前期和青春中期身高、体重和骨密度增长率最快，因此应对此期青少年注意补充足够的营养物质和矿物质，尤其对经济、生活条件较差的地区更应加以关照，保障健康发育防止骨畸形和骨折发生、本调查对青少年医疗保健有指导意义。

To investigate changes of bone density during growing period of children,the bone density of the distal end of radius was measured with photon absorptiometry(~241 Am) in 5485 children aged 7to 19 years of farmers,and their height and weight were also measured. The results indicate that there are no differences between the height (before 14 years of age),the weight and the bone density(before 15 years )in both sexes (p>0.05),and afterwards there were differences in both sexes (p<0.05). The results of regression analysis show that there is a positive correlation between the bone density and the age,height and weight in both sexes(p<0.01, respectively). The children were divided by age into four periods: i. e.,school age,pre-pubescence,mid-pubescence and post-pubescence. The growing percentages of the height,the weight and the bone density in both pre-pubescence and mid-pubescence increase more obviously than those in school age and post-pubescence,except the height of girls in mid-pubescence.The bone density of the children in coastal area is higher than those in mountain area and plain area in both sexes (p<0.001, respectively). The results show that adequate calcium intake is beneficial to increase the bone density of children.