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

摘要: Dual-energy x-ray absorptiometry (DXA) and bioelectrical impedance analysis (BIA) are common methods of body composition assessment, but the agreement between these varies. Bias DXA single-frequency BIA was evaluated at 6 different time points in 48 active male female adults consuming standardized high- low-carbohydrate diets. It hypothesized that fixed proportional biases exist extent bias does not differ based on sex. Substantial present for estimates obtained by BIA, both men women exhibited fat mass (FM) fat-free (FFM). The magnitude greater women, only percentage. In individuals with less FM, mean difference high, indicating underestimated FM relative to DXA. However, better seen. Correspondingly, FFM FFM. some high quantities or sample, relationship devices reversed such overestimated degree disagreement varies substantially size sex all-encompassing statements regarding comparability technologies cannot presently be made.