6至9岁超重及肥胖学童的氧化氘稀释法与身体成分
Deuterium oxide dilution and body composition in overweight and obese schoolchildren aged 6-9 years.
作者信息
Bila Wendell Costa, Freitas André Everton de, Galdino Alexsandro Sobreira, Ferriolli Eduardo, Pfrimer Karina, Lamounier Joel Alves
机构信息
Post-Graduate Program in Health Sciences, Universidade Federal de São João del Rei (UFSJ), Divinópolis, MG, Brazil.
Post-Graduate Program in Child and Adolescent Health, Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil.
出版信息
J Pediatr (Rio J). 2016 Jan-Feb;92(1):46-52. doi: 10.1016/j.jped.2015.03.007. Epub 2015 Aug 3.
OBJECTIVE
To correlate different methods of body composition assessment in overweight or obese schoolchildren, using deuterium oxide (D2O) dilution as a reference.
METHODS
Percentage of total body water (%TBW), fat free mass (%FFM), and body fat (%BF) were assessed by D2O and tetrapolar electrical bioimpedance analysis (BIA) in 54 obese and overweight students aged 6-9 years. Skinfold thickness (ST), body mass index (BMI), conicity index (CI), waist circumference (WC), waist-to-height ratio (WHtR), and waist-to-hip (WHR) ratio were also used.
RESULTS
Mean values for body composition were 38.4%±8.4% BF, 44.9%±6.1% TBW and 61.6%±8.4% FFM. There was no significant difference in body weight, body fat mass (FM), TBW, and FFM between genders. Regarding D2O, ST underestimated %BF, and overestimated %FFM in both genders (p<0.05). BIA overestimated %TBW in the group as a whole and in males (p<0.05). The only positive and strong correlations occurred in females regarding the WC (σ=0.679), CI (r=0.634), and WHtR (r=0.666).
CONCLUSIONS
In this sample of obese and overweight children, there were strong correlations between body composition measured by D2O and some indices and anthropometric indicators in females, but there was no positive and strong correlation of fat tissue with the indices/indicators at all ages and in both genders.
目的
以氧化氘（D2O）稀释法为参考，比较超重或肥胖学龄儿童不同身体成分评估方法。
方法
采用D2O稀释法和四极生物电阻抗分析法（BIA）对54名6至9岁的肥胖和超重学生进行全身水含量百分比（%TBW）、去脂体重百分比（%FFM）和体脂百分比（%BF）评估。还测量了皮褶厚度（ST）、体重指数（BMI）、锥度指数（CI）、腰围（WC）、腰高比（WHtR）和腰臀比（WHR）。
结果
身体成分的平均值为%BF 38.4%±8.4%、%TBW 44.9%±6.1%和%FFM 61.6%±8.4%。男女之间在体重、体脂肪量（FM）、TBW和FFM方面无显著差异。关于D2O，ST在男女中均低估了%BF并高估了%FFM（p<0.05）。BIA在总体组和男性中高估了%TBW（p<0.05）。仅在女性中，WC（σ=0.679）、CI（r=0.634）和WHtR（r=0.666）之间存在显著正相关。
结论
在这个肥胖和超重儿童样本中，D2O测量的身体成分与女性的一些指数和人体测量指标之间存在显著相关性，但在所有年龄和男女两性中，脂肪组织与这些指数/指标均无显著正相关。
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