Work

Evaluation of DXA vs. MRI for body composition measures in 1‐month olds

Year: 2015

Type: article

Abstract: BACKGROUND: Detailed measures of infant body composition are needed for understanding the impact of genes and environment on growth early in life. OBJECTIVE: The purpose of this study was to compare the accuracy and bias of body composition in infants. METHODS: Dual energy X-ray absorptiometry (DXA) and magnetic resonance imaging (MRI) were used to determine body composition and the trunk depot. The depots measured were total fat mass (FM), total fat-free mass (FFM) and trunk FM and FFM using DXA and MRI in 14 infants. RESULTS: None of the regression lines between DXA and MRI significantly deviate from the line of identity for any of the depots studied. However, Bland-Altman analyses revealed bias for trunk FM and trunk FFM. CONCLUSION: Our data showed DXA to be accurate (regression not significantly deviating from the line of identity), with high agreement (indicated by high R(2) ) and without bias (non-significant Bland-Altman) when estimating total FM and FFM. This could not be said for trunk estimates.

Source: Pediatric Obesity

DOI: 10.1111/ijpo.12021

Authors: D. A. Fields, A. M. Teague, K. R. Short, S. D. Chernausek

Institutions: University of Oklahoma Health Sciences Center, University of Oklahoma

Language: English

Topic: Body Composition Measurement Techniques

Subfield: Physiology

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

Funder: National Institute of Diabetes and Digestive and Kidney Diseases