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

作者：Bila Wendell Costa^*; de Freitas Andre Everton; Galdino Alexsandro Sobreira; Ferriolli Eduardo; Pfrimer Karina; Lamounier Joel Alves

来源：Jornal de Pediatria, 2016, 92(1): 46-52.

DOI：10.1016/j.jped.2015.03.007

• Deuterium
• Body composition
• Obesity
• Overweight
• Child

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 (sigma = 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.

• 出版日期2016-2