Body composition prediction equations based on deuterium oxide dilution method in Mexican children: a national study
Body composition prediction equations based on deuterium oxide dilution method in Mexican children: a national study
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DOI：
10.1038/ejcn.2012.89
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发表时间：
2012-10-01
影响因子：
4.7
通讯作者：
Aleman-Mateo, H.
中科院分区：
文献类型：
--
作者：
Ramirez, E.;Valencia, M. E.;Aleman-Mateo, H.
背景/目的：在墨西哥的许多地区，肥胖和营养不良并存。然而，准确的评估是困难的，因为没有关于身体成分的流行病学数据。这项研究的目的是通过建立基于氧化氢稀释的生物电阻抗和人体测量方程来促进对不同地理区域和种族的墨西哥学龄儿童身体成分的评估。通过生物阻抗分析(BIA)测量身高(Ht)、体重(Wt)、三头肌皮褶厚度(Tricp-SKF)和阻力(R)。结果：BIA方程为Ffm(Kg)=0.661 x Ht(2)/R+0.200 x Wt-0.320。R-2为0.96，均方根为1.39 kg。最终的人体测量方程为：Fm(Kg)=-1.067 x性别+0.458 x TRIP-SKF+0.263 x Wt-5.407。R-2为0.91，SRMSE为1.60 kg。BIA方程的偏差为0.095 kg，精度为1.43 kg。人体测量方程的偏差为0.047公斤，精度为1.58公斤。结论：我们验证了两个公式，用于评估墨西哥三个主要地区的土著和非土著儿童和青年的身体成分。这些公式提供了可靠的估计，并将促进对肥胖和营养不良的更好理解。
BACKGROUND/OBJECTIVES: Obesity and undernutrition co-exist in many regions of Mexico. However, accurate assessments are difficult because epidemiological data on body composition are not available. The aim of this study was to facilitate assessments of body composition in Mexican school children of different geographical regions and ethnicity by developing equations for bioelectrical impedance and anthropometry based on deuterium oxide dilution.SUBJECTS/METHODS: We evaluated 336 subjects (143 belonged to six major indigenous groups) from Northern, Central and Southern Mexico. We measured height (Ht), weight (Wt), tricipital skinfold (Tricp-SKF) and resistance (R) based on a bioimpedance analysis (BIA). Fat-free mass (FFM) and fat mass (FM) were estimated from measurements of total body water with the deuterium dilution technique.RESULTS: The final BIA equation was FFM (kg) = 0.661 x Ht(2)/R + 0.200 x Wt - 0.320. The R-2 was 0.96; the square root of the mean square error (SRMSE) was 1.39 kg. The final anthropometric equation was FM (kg) = - 1.067 x sex + 0.458 x Tricp-SKF + 0.263 x Wt - 5.407. The R-2 was 0.91; SRMSE was 1.60 kg. The BIA equation had a bias of 0.095 kg and precision of 1.43 kg. The anthropometric equation had a bias of 0.047 kg and precision of 1.58 kg.CONCLUSIONS: We validated two equations for evaluating body composition in Mexican indigenous and non-indigenous children and youth from three main regions of the country. These equations provided reliable estimates and will promote a better understanding of both obesity and undernutrition.