Determination of Fat-Free Mass Density and its Components in Older Hispanic Adults by In Vivo Methods
| Autor: | Erik Ramírez-López, Julián Esparza-Romero, Rosa Olivia Mendez-Estrada, Rogelio González-Arellanes, Bertha-Isabel Pacheco-Moreno, Heliodoro Alemán-Mateo, Alejandra Rodríguez-Tadeo, Rene Urquidez-Romero, Alma-Elizabeth Robles-Sardin |
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| Rok vydání: | 2021 |
| Předmět: |
Adult
Male Endocrinology Diabetes and Metabolism Fraction (chemistry) Body weight Animal science Absorptiometry Photon Fat free mass Cadaver Bone Density medicine Humans Radiology Nuclear Medicine and imaging Orthopedics and Sports Medicine Obesity Aged business.industry Hispanic or Latino Body density medicine.disease Cross-Sectional Studies Adipose Tissue Reference values Body Composition Densitometry business |
| Zdroj: | Journal of clinical densitometry : the official journal of the International Society for Clinical Densitometry. 25(4) |
| ISSN: | 1094-6950 |
| Popis: | The densitometry method estimates body composition based on cadaver reference values, mainly the fat-free mass density value of 1.100 g/cm3. However, several changes in fat-free mass components by aging, ethnicity, and excess adiposity could influence their density and affect body composition estimations. The present study aimed to compare the mean fat-free mass component values in older Hispanic adults to cadaver reference values. This cross-sectional study included a sample of 420 subjects aged ≥60 yr from northern Mexico. Fat-free mass was determined by the four-compartment model using air displacement plethysmography, the deuterium dilution technique, and dual-energy X-ray absorptiometry for body density, aqueous and mineral fractions of body weight, respectively. A 1-sample t test was used to compare the fat-free mass density and aqueous, mineral, and residue fractions of fat-free mass from subjects in the study to the assumed cadaver reference values. The mean fat-free mass density value for the total sample of older Hispanic adults (1.096 ± 0.011 g/cm3) was significantly (p < 0.001) lower than the assumed value of 1.100 g/cm3, except in obese older men. The mean aqueous fraction of fat-free mass (74.8 ± 3.3%) was higher than the assumed value of 73.8%, and the mean residue fraction of fat-free mass value was lower (18.3 ± 3.4%) than the reference value of 19.4%. Indeed, only the mean mineral fraction of fat-free mass value (6.8 ± 0.8%) was similar to the reference value. In the total sample, all characteristic mean fat-free mass values in these older Hispanic adults differed from cadaver reference values, except the mineral fraction of fat-free mass value. |
| Databáze: | OpenAIRE |
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