IMPACT OF EARLY DIETARY FACTORS ON CHILD DEVELOPMENT AND HEALTH
Location: Arkansas Children Nutrition Center
Title: Air displacement plethysmography, dual-energy x-ray absorptiometry, and total body water to evaluate body composition in preschool-age children
| Crook, Tina - |
| Armbya, Narrain - |
| Cleves, Mario - |
| Andres, Aline - |
Submitted to: Journal of the Academy of Nutrition and Dietetics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: August 13, 2012
Publication Date: December 15, 2012
Citation: Crook, T., Armbya, N., Cleves, M., Badger, T.M., Andres, A. 2012. Air displacement plethysmography, dual-energy x-ray absorptiometry, and total body water to evaluate body composition in preschool-age children. Journal of the Academy of Nutrition and Dietetics. 112(12):1993-1998.
Interpretive Summary: This study determined the accuracy of air displacement plethysmography (ADP) in measuring body fat mass in 66 healthy children at ages 3-5 years. Compared to the criterion method (deuterium dilution), ADP did not accurately assess body fat mass in children age 3-5 years. Thus, at this time, the criterion method, dual energy X-ray absorptiometry, or quantitative nuclear magnetic resonance may be considered as better options for assessing body composition in young children.
Anthropometrics and body mass index are only proxies in the evaluation of adiposity in the pediatric population. Air displacement plethysmography technology was not available for children aged 6 months to 9 years until recently. Our study was designed to test the precision of air displacement plethysmography (ADP) in measuring body fat mass in children at ages 3 to 5 years compared with a criterion method, deuterium oxide dilution (D(2)O), which estimates total body water, and a commonly used methodology, dual-energy x-ray absorptiometry (DXA). A prospective, cross-sectional cohort of 66 healthy children (35 girls) was recruited in the central Arkansas region between 2007 and 2009. Weight and height were obtained using standardized procedures. Fat mass (%) was measured using ADP, DXA, and D(2)O. Concordance correlation coefficient and Bland-Altman plots were used to investigate the precision of the ADP techniques against D(2)O and DXA in children at ages 3 to 5 years. ADP concordance correlation coefficient for fat mass was weak (0.179) when compared with D(2)O. Bland-Altman plots revealed a low accuracy and large scatter of ADP fat mass (%) results (mean=-2.5, 95% CI -20.3 to 15.4) compared with D(2)O. DXA fat mass (%) results were more consistent although DXA systematically overestimated fat mass by 4% to 5% compared with D(2)O. Compared with D(2)O, ADP does not accurately assess percent fat mass in children aged 3 to 5 years. Thus, D(2)O, DXA, or quantitative nuclear magnetic resonance may be considered better options for assessing fat mass in young children.