CAJ | 학술논문

目的：探讨儿童青少年生长发育阶段骨矿物质沉积规律及骨密度变化的性别差异;方法：对北京市478名7～17岁健康儿童青少年,采用DEXA法测量全身及各部位身体成分,分析各年龄组骨矿含量及骨密度的变化;结果：男女生全身骨矿含量和骨密度均随年龄增长而持续增加,7～17岁男女生全身骨矿含量分别增长了1.80和1.83倍,骨密度增长约40%;男女生骨密度增长幅度最大的年龄分别为14～15岁和11～12岁。在青春期生长突增阶段,男女全身及多数部位骨密度变化曲线出现＂两次交叉＂现象,但12岁以后女生头部和脊柱骨密度超过男生,没有出现第二次交叉。全身骨密度与体脂率、腰围等肥胖相关指标呈负相关,与肌肉组织含量呈正相关（P=0.000）;与男女生全身骨密度相关程度最高的是躯干骨密度（相关系数分别为0.911,0.909,P=0.000）,其次是大腿、骨盆。结论：青春期女生骨骼生长突增早于男生;除头部、脊柱外,男女多数部位骨密度生长发育曲线出现两次交叉;儿童青少年全身骨密度与肥胖程度呈负相关,与肌肉含量呈正相关;躯干骨密度对全身骨密度有较好的预测意义。
목적：탐토인동청소년생장발육계단골광물질침적규률급골밀도변화적성별차이;방법：대북경시478명7～17세건강인동청소년,채용DEXA법측량전신급각부위신체성분,분석각년령조골광함량급골밀도적변화;결과：남녀생전신골광함량화골밀도균수년령증장이지속증가,7～17세남녀생전신골광함량분별증장료1.80화1.83배,골밀도증장약40%;남녀생골밀도증장폭도최대적년령분별위14～15세화11～12세。재청춘기생장돌증계단,남녀전신급다수부위골밀도변화곡선출현＂량차교차＂현상,단12세이후녀생두부화척주골밀도초과남생,몰유출현제이차교차。전신골밀도여체지솔、요위등비반상관지표정부상관,여기육조직함량정정상관（P=0.000）;여남녀생전신골밀도상관정도최고적시구간골밀도（상관계수분별위0.911,0.909,P=0.000）,기차시대퇴、골분。결론：청춘기녀생골격생장돌증조우남생;제두부、척주외,남녀다수부위골밀도생장발육곡선출현량차교차;인동청소년전신골밀도여비반정도정부상관,여기육함량정정상관;구간골밀도대전신골밀도유교호적예측의의。
Objectives：To explore the bone mass and bone mineral density change in children and adolescents.Methods： 478 healthy children and adolescents aged 7~17 were recruited from 5 schools located in Beijing.Their whole body and different body parts composition were measured with DEXA.Bone mass and bone mineral density were analyzed in this paper.Results： Both boys and girls follow the same course of growth for bone mass and bone mineral density,which were increased from 7 to 17 by 1.80 for boys and 1.83 times for girls and 40% for both of them.The maximum increment of bone density was in 14~15 and 11~12 for boys and girls respectively.The bone density distance curve of whole body and most of body parts between boys and girls demonstrates ＂twice intersections＂ during pubertal growth spurt period except for head and spine.Two crossovers were in 11~12 and 14~15 respectively.Whole body bone density was correlated with body fat percentage,waist circumference negatively,and correlated with muscular mass positively（P=0.000）.Among body parts,the trunk bone density was correlated with whole body bone mineral density in boys and girls（r=0.911 for boys and 0.909 for girls,respectively.P=0.000）,and then follows the thighs and pelvic.Conclusion：Skeletal growth spurt in girls was earlier than boys.Except for head and spine,the growth curves of the bone density of girls and boys have two crossovers.Excessive body fat might have a negative impact on the growth of bone mineral density.Trunk bone density might be a good predictor of whole body bone density.