中国临床康复2005，Vol.9Issue(35)：148-149,2.
深圳市13～15岁正常少年超声骨密度特征
Measurement of bone mineral density with ultrasound in healthy teenagers at the age of 13 to 15 years in Shenzhen city
摘要
Abstract
BACKGROUND: Bone mineral density(BMD) measured with ultrasound bone densitometer lacks the criteria for clinical signs of independent application of quantitative ultrasound(QUS).OBJECTIVE: To investigate BMD of teenagers in either gender at the age of 13 to 15 years in Shenzhen city so as to provide normal referenced values of ultrasound-evaluated BMD in teenagers at the age mentioned above.DESIGN: A cross-sectional investigation.SETTING: Department of Ultrasound, People's Hospital of Longgang District, Shenzhen.PARTICIPANTS: Totally 158 healthy volunteers(male 90 and female 68)at the age of 13 to 15 years were selected from two middle schools in Shenzhen City on April 12, 2003 after excluding those who had affected with fracture or had taken the drugs influencing bone metabolism such as hormones 6 months before our investigation. The female ones were divided into pre-menarche and post-menarche groups.METHODS: All the patients were corrected based on the normal physical norm(error of truth lower than 1% and accuracy equal to 3%) after an ultrasound bone densitometer (made in America) was started up. The left heels of the subjects were placed between detecting heads, and the fixing position was adjusted with location appurtenances to measure the BMD of left heels (g/cm2). The body mass and body height were measured in all the teenagers with the same weighing and height machines.MAIN OUTCOME MEASURES: ①Body height, body mass and heel BMD of healthy teenagers at the age of 13 to 15 years; ②BMD of the healthy teenagers in either gender at the age of 13 to 15 years; ③Distribution of BMD in pre-menarche and post-menarche female teenagers at the age of 13 to 15 years.RESULTS: ①Body height, body mass and heel BMD of healthy teenagers at the age of 13 to 15 years: The increasing speed of body height in teenagers at 14 years of age is over two times as fast as that in those at 15 years of age(4.705 cm per year vs 2.096 cm per year). The average growth rate of BMD in teenagers at the age of 14 years was in a negative growth as compared with that in those at the age of 13 years, and it was increased by 10.8% in teenagers of 15 years old as compared with that in those of 14 years. The body mass was in a negative correlation with BMD (r=0.820, P ＜ 0.001). ②BMD of the healthy teenagers in either gender at the age of 13 to 15 years: The BMD was higher in females than in males [(0.542±0.117) g/cm2 vs (0.528±0.086) g/cm2 for those of 13 years old,(0.508±0.108) g/cm2 vs (0.487±0.079) g/cm2 for those of 14 years old,(0.609±0.234) g/cm2 vs (0.501±0.225) for those of 15 years]③Distribution of BMD in pre-menarche and post-menarche female teenagers at the age of 13 to 15 years: It was significantly higher in the pre-menarche ones than in post-menarche ones (P ＜ 0.001).CONCLUSIONS: ①The heel BMD in the teenagers at the age of 13 to 15 years is related to their genders and the increasing speed of their body height. ②Body mass has more influence on BMD than body height does.③Increase of estrogen in post-menarche females can promote the increase of BMD.关键词
骨密度/跟骨/青春期分类
医药卫生引用本文复制引用
邢晨芳,张烨峰,范国裕,周伟文,吕捷,郑宝娜,陈锦贤..深圳市13～15岁正常少年超声骨密度特征[J].中国临床康复,2005,9(35):148-149,2.基金项目
深圳市科学技术局基金资助项目(200204163) （200204163）
