%0 Journal Article
%T Estimaci¨®n de la masa grasa por DXA y el modelo de cuatro compartimentos en p¨²beres mexicanos de 9 a 14 a£¿os
%A Ram¨ªrez
%A Erik
%A Valencia
%A Mauro E
%A Moya Camarena
%A Silvia Y
%A Alem¨¢n-Mateo
%A Heliodoro
%A M¨¦ndez
%A Rosa O
%J Archivos Latinoamericanos de Nutrici¨®n
%D 2010
%I Scientific Electronic Library Online
%X the objective of this study was to validate the estimation of body fat (%bf) by dxa (dual-energy x-ray absorciomdpx-md) against the four compartment model (4c) of body composition in 32 mexican pubertal girls and boys (aged 9 - 14y; f=16). the mean of the difference between dxa and 4c model was -3.5 %bf (p=0.171). the limits of agreement (95% ¡À 2 sd) were +5% to -12%bf. the precision of estimated limits of y the confidence intervals were -1.9% to -5.1%bf (p=0.050). the concordance correlation coefficient was pc= 0.85. the test of accuracy for coincidence of slop intercepts between dxa and the 4c model showed no coincidence (p< 0.05). the precision by r2 explained 83% of the variance (see, 4.1 %). the individual accuracy assess by the total error was 5.6%. the group mean accuracy by two way analysis of variance of body fat did not show interaction between method (dxa-4c model) and separate analysis of gender and overweight. however, there was an effect of method (p=0.043) in the presence of overweight (p<0.001). in conclusion, the estimation of percent of body fat by dxa was not precise and accurate in a group of mexican children. however, results do not limit the utility of dxa for the measurements of body composition and its relation with health outcomes, especially in follow up studies.
%K dxa
%K body composition
%K mexican youth
%K body fat percentage.
%U http://www.scielo.org.ve/scielo.php?script=sci_abstract&pid=S0004-06222010000300005&lng=en&nrm=iso&tlng=en