PP114-MON HIGH PROPORTION OF DIETARY FAT INTAKE INCREASES RISK OF BEING MALNOURISHED 10 YEARS LATER

Abstract

Rationale: Position of the body and consequent distribution of body water between body compartments affect the accuraccy of bioelectrical impedance analysis (BIA) and may lead to incorrect information about an individual’s body composition. This study aimed to compare the accuracy of body fat estimates obtained with standing leg-to-leg (LL) and supine hand-to-leg (HL) BIA techniques relative to anthropometry, and to evaluate the effects of body position on BIA-determined body fat percentage (BFP). Methods: The BFP of young males and females (n = 40) was determined with LL (adjusted for standing position) and HL (adjusted for supine position) BIA analysers, as well as from gender-specific Durnin and Womersly anthropometric equations used as the reference method for BIA body fat estimation. Each subject was measured with LL analyser in a standing position, before and after 20 minutes of supine rest, and with HL analyser in a standing and a supine position, before and after 20 minutes of supine rest. All measurements were taken under constant and controlled conditions. Significance of differences was assessed by means of one-way ANOVA for repeated measures. Results: The results demonstrate that the BFP as determined with different BIA analysers in different body positions differ significantly according to the procedure used (P< 0.01). In general, BIA values of BFP obtained after 20 minutes of supine rest tend to overestimate, and values obtained in upright position underestimate the actual BFP. Conclusion: The results of this study demonstrate that BIA estimations of BFP depend on the position of the body during the measurement, likely due to the posturerelated distribution of water in the body. Consequently, the use of different metods can classify one subject into different body fat content categories, which calls for further standardisation. Disclosure of Interest: None Declared.