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Development and validation of anthropometric equations to estimate body composition in adult women
Aristizabal, Juan C.; Estrada-Restrepo, Alejandro & García, Argenis Giraldo
Abstract
Objective: To develop anthropometric equations to predict body fat
percentage (BF%).
Methods: In 151 women (aged 18-59) body weight, height, eight-skinfold
thickness (STs), six- circumferences (CIs), and BF% by
hydrodensitometry were measured. Subjects data were randomly
divided in two groups, equation-building group (n= 106) and validation
group (n= 45). The equation-building group was used to run linear
regression models using anthropometric measurements as predictors
to find the best prediction equations of the BF%. The validation group
was used to compare the performance of the new equations with those
of Durnin-Womersley, Jackson-Pollock and Ramirez-Torun.
Results: There were two preferred equations: Equation 1= 11.76 +
(0.324 x tricipital ST) + (0.133 x calf ST) + (0.347 x abdomen CI)
+ (0.068 x age) - (0.135 x height) and Equation 2= 11.37 + (0.404 x
tricipital ST) + (0.153 x axilar ST) + (0.264 x abdomen CI) + (0.069
x age) - (0.099 x height). There were no significant differences in
BF% obtained by hydrodensitometry (31.5 ±5.3) and Equation
1 (31.0 ±4.0) and Equation 2 (31.2 ±4.0). The BF% estimated by
Durning-Womersley (35.8 ±4.0), Jackson-Pollock (26.5 ±5.4) and
Ramirez-Torun (32.6 ±4.8) differed from hydrodensitometry (p
<0.05). The interclass correlation coefficient (ICC) was high between
hydrodensitometry and Equation 1 (ICC= 0.77), Equation 2 (ICC=
0.76), and Ramirez-Torun equation (ICC= 0.75). The ICC was low
between hydrodensitometry and Durnin-Womersley (ICC= 0.51)
and Jackson-Pollock (ICC= 0.53) equations.
Conclusion: The new Equations-1 and 2, performed better than the
commonly used anthropometric equations to predict BF% in adult women.
Keywords
Women; body composition; obesity; anthropometry; skinfold thickness; body weight
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