Body composition obtained from the body mass index |
| |
Authors: | Daniele Martarelli Benedetta Martarelli Pierluigi Pompei |
| |
Institution: | (1) Dept. of Experimental Medicine and Public Health, University of Camerino, 62032 Camerino, MC, Italy |
| |
Abstract: | Background Since obesity and related diseases are now considered epidemic, new and more accurate formulas for epidemiological studies
are of interest to the scientific community. Several equations have been proposed to estimate the body composition simply
from anthropometric measurements. However, with time, the body composition of the populations studied changes in relation
to their food habits and lifestyle, and, therefore, the equations must be regularly updated and corrected.
Aim of the study The aim of the study was to develop new equations to determine the body composition among the Italian population using the
body mass index and independently by variables such as age and body structure.
Methods Bioelectrical impedance and anthropometric analysis of 764 Italian Caucasian subjects (342 females and 422 males), 11 to 80 years
of age, were analysed. Females and males were analysed separately. Multiple regression analyses were performed in order to
estimate the body composition of the subjects. The estimated masses were then compared with the measured masses using Bland
and Altman plots. We also calculated the differences between the estimated and measured masses, reported as % of the body
weight, for the 95, 85 and 75° percentile of the female and male groups. Finally we compared our formulas with the Watson
equations, which are used to estimate the total body water.
Results All body masses estimated were positively correlated to the measured values. Moreover, at any percentile analysed, our formulas
resulted more precise than the Watson formula. Equations: Females: FM = 1.9337 BMI – 26.422; FFM = BW – FM; BCM = 0.3655 FFM
+ 4.865; TBW = 0.5863 FFM + 7.1732; Males: FM = 1.407 BMI – 21.389; FFM = BW – FM; BCM = 0.4485 FFM + 3.3534; TBW = 0.6997
+ 1.4567.
Conclusions Although an inevitable inaccuracy must be expected in epidemiological studies, our equations are adequate to analyze the body
composition state and changes occurring among the Italian population by simply considering weight and height. |
| |
Keywords: | bioelectrical impedance BMI body composition anthropometry |
本文献已被 PubMed SpringerLink 等数据库收录! |
|