Proportional Bias between Dual-Energy X-ray Absorptiometry and Bioelectrical Impedance Analysis Varies Based on Sex in Active Adults Consuming High- and Low-Carbohydrate Diets

Dual-energy x-ray absorptiometry (DXA) and bioelectrical impedance analysis (BIA) are common methods of body composition assessment, but the agreement between these methods varies. Bias between DXA and single-frequency BIA was evaluated at six different time points in 48 active male and female adults consuming standardized high- and low-carbohydrate diets. It was hypothesized that fixed and proportional biases exist between DXA and BIA, but that the extent of bias does not differ based on sex. Substantial fixed bias was present for estimates obtained by DXA and BIA, and both males and females exhibited proportional bias for fat mass and fat-free mass.

Source: Nutrition Research - May 16, 2017 Category: Nutrition Authors: Grant M. Tinsley Source Type: research