Measurement of body fat using leg to leg bioimpedance
Measurement of body fat using leg to leg bioimpedance
复制标题
DOI：
10.1136/adc.85.3.263
复制
发表时间：
2001-09-01
影响因子：
5.2
通讯作者：
Nelson, EAS
中科院分区：
文献类型：
--
作者：
Sung, RYT;Lau, P;Nelson, EAS
目的-(1)通过评估腿对腿生物阻抗分析(BIA)装置与双能X射线吸收法(DXA)的一致性和重复性，验证BIA装置在儿童身体成分测量中的有效性。方法：采用序贯BIA法和DXA法对49名7~18岁儿童的体成分进行测定，计算两种方法的一致性。BIA方法的重复性是从重复测量中建立的。结果：BIA法与DXA法95%的符合率为可接受的范围(脂肪质量-3.3公斤~-0.5公斤，体脂-3.9%~0.6%)。体脂百分比随年龄增长而增加。与1993年的香港生长调查相比，这些儿童的体重指数更高。男童和女童7岁时平均体脂百分比分别为17.2%(4.4%)和14.0%(3.4%)，16岁时分别增加到19.3%(4.8%)和27.8%(6.3%)。结论腿对腿BIA是替代DXA测量体脂的有效方法。本表格提供7至16岁香港华人儿童体脂百分率的临时参考范围。
Aims-(1) To validate a leg to leg bioimpedance analysis (BIA) device in the measurement of body composition in children by assessment of its agreement with dual energy x ray absorptiometry (DXA) and its repeatability. (2) To establish a reference range of percentage body fat in Hong Kong Chinese children.Methods-Sequential BIA and DXA methods were used to determine body composition in 49 children aged 7-18 years; agreement between the two methods was calculated. Repeatability for the BIA method was established from duplicate measurements. Body composition was then determined by BIA in 1139 girls and 1243 boys aged 7-16 years, who were randomly sampled in eight local primary and secondary schools to establish reference ranges.Results-The 95% limits of agreement between BIA and DXA methods were considered acceptable (-3.3 kg to -0.5 kg fat mass and -3.9 to 0.6% body fat). The percentage body fat increased with increasing age. Compared to the 1993 Hong Kong growth survey, these children had higher body mass index. Mean (SD) percentage body fat at 7 years of age was 17.2% (4.4%) and 14.0% (3.4%) respectively for boys and girls, which increased to 19.3% (4.8%) and 27.8% (6.3%) at age 16.Conclusion-Leg to leg BIA is a valid alternative method to DXA for the measurement of body fat. Provisional reference ranges for percentage body fat for Hong Kong Chinese children aged 7-16 years are provided.