Assessing skeletal muscle mass and lean body mass: an analysis of the agreement among Dual X-Ray Absorptiometry (DXA), Anthropometry, and Bioelectrical Impedance (BIA)

摘要: Introduction Methods of body composition estimation such as dual-energy X-ray absorptiometry (DXA), anthropometry, and bioimpedance (BIA) are used for the estimation of skeletal muscle mass (SMM) and lean body mass (LBM). No previous studies have examined whether these methods generate comparable results, or whether they are valid by using DXA as the reference. The aims of the present investigation were: a) to assess the differences between DXA, anthropometry, and BIA in the estimation of SMM and LBM, taking into consideration the impact of sex and hydration status; and b) to examine the agreement of anthropometry and BIA as compared to DXA for the estimation of SMM and LBM.Methods A descriptive cross-sectional design was followed with 262 healthy young adults (159 males and 103 females). LBM and SMM were assessed by anthropometry with the formulas from Lee et al. and Kulkarni …