Deuterium oxide dilution and body composition in overweight and obese schoolchildren aged 6‐9 years

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• 作者：Wendell Costa Bila^a ; ^{wendellbila1@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; André ; Everton de Freitas^b ; Alexsandro Sobreira Galdino^c ; Eduardo Ferriolli^d ; Karina Pfrimer^d ; Joel Alves Lamounier^a
• 关键词：Deuterium ; Body composition ; Obesity ; Overweight ; Child
• 刊名：Jornal de Pediatria (Versão em Português)
• 出版年：2016
• 出版时间：January-February 2016
• 年：2016
• 卷：92
• 期：1
• 页码：46-52
• 全文大小：571 K

文摘

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.