Determination of thigh volume in youth with anthropometry and DXA: agreement between estimates.
This study examined the agreement between estimates of thigh volume (TV) with anthropometry and dual-energy x-ray absorptiometry (DXA) in healthy school children. Participants (n=168, 83 boys and 85 girls) were school children 10.0-13.9 years of age. In addition to body mass, height and sitting height, anthropometric dimensions included those needed to estimate TV using the equation of Jones & Pearson. Total TV was also estimated with DXA. Agreement between protocols was examined using linear least products regression (Deming regressions). Stepwise regression of log-transformed variables identified variables that best predicted TV estimated by DXA. The regression models were then internally validated using the predicted residual sum of squares method. Correlation between estimates of TV was 0.846 (95%CI: 0.796-0.884, Sy·x=0.152 L). It was possible to obtain an anthropometry-based model to improve the prediction of TVs in youth. The total volume by DXA was best predicted by adding body mass and sum of skinfolds to volume estimated with the equation of Jones & Pearson (R=0.972; 95%CI: 0.962-0.979; R (2)=0.945).
a Faculty of Sport Sciences and Physical Education , University of Coimbra , Coimbra , Portugal.
Manuel J
MJ
Coelho-E-Silva
Robert M
RM
Malina
Filipe
F
Simões
João
J
Valente-Dos-Santos
Raul A
RA
Martins
Enio R
ER
Vaz Ronque
Edio L
EL
Petroski
Claudia
C
Minderico
Analiza M
AM
Silva
Fátima
F
Baptista
Luís B
LB
Sardinha
D015502:Absorptiometry, Photon / Q000379:methods*; D000273:Adipose Tissue / Q000000981:diagnostic imaging*; D000293:Adolescent; D000886:Anthropometry; D001823:Body Composition; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D012372:ROC Curve; D015203:Reproducibility of Results; D013848:Thigh / Q000000981:diagnostic imaging*