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目的:研究南京地区0～3岁健康儿童跟骨骨密度检测结果,探讨婴幼儿跟骨骨密度变化规律,建立本地区婴幼儿超声骨密度正常参考值。方法:通过定量超声法测定南京地区1 568例0～3岁婴幼儿跟骨骨密度(BMD),同时测量受检者的身长与体重,并计算体重指数(BMI)。结果:不同性别0～36月龄婴幼儿跟骨BMD值在各年龄段之间差异有统计学意义,同一年龄段BMD值男童稍高于女童,但差异无统计学意义(P>0.05)。﹤6个月龄儿童BMD值随年龄增加而降低,﹥6个月龄儿童后随着年龄增长BMD值呈上升趋势。同时,BMD值与身长、体重相关,而与BMI值无相关性。结论:婴幼儿跟骨骨密度值受年龄、体重及身长影响。
OBJECTIVE: To study the results of calcaneal bone mineral density test in healthy children aged 0 ~ 3 years in Nanjing, to explore the regularity of calcaneal bone mineral density in infants and young children and to establish the normal reference value of ultrasound bone mineral density in infants and young children in this area. Methods: The bone mineral density (BMD) of 1 568 infants and toddlers aged 0 ~ 3 years in Nanjing was measured by quantitative ultrasound. The body length and body weight of the infants and young children were measured. The body mass index (BMI) was calculated. Results: The BMD of calcaneus in infants and young children aged 0-36 months was significantly different among all age groups. The boys with BMD in the same age group were slightly higher than those in girls, but the difference was not statistically significant (P> 0.05) . BMD values of children <6 months old decreased with increasing age, while BMD values of children aged> 6 months showed an increasing trend with age. At the same time, BMD was related to body weight and body weight, but not to BMI. Conclusion: The BMD of infants and young children is affected by age, weight and length.