Journal of Medical Sciences1682-44741812-5727Asian Network for Scientific Information10.3923/jms.2008.15.21HassanNayera E. El-MasrySahar A. SolimanNadia L. EL-BatranMona M. 1200881The inter-relationships and alter nativity of body composition variables
derived from simple anthropometry [BMI and Skin Folds (SFs) prediction
equations] and Bioelectrical Impedance Analysis (BIA) with dual energy
x-ray (DXA) of healthy sixty nine children (37 boys and 32 girls) aged
9.24±1.73 years old were evaluated. The children recruited from
public schools in Giza governorate. All of them had BMI ranged between
15th and 85th percentile and were assessed for body composition [percentage
body fat (%BF), fat free mass (FFM; kilograms) and body fat mass (BFM;
kilograms)] using Slaughter Skin Folds (SFs) prediction equations, BIA
and DXA. Repeated ANOVA showed significant differences among the three
methods used for the studied variables (p<0.001). In general, Slaughter
and BIA are significantly underestimated measured %BF. There is a high
correlation between the BMI and both the estimated %BF and BFM (r = 0.67-0.91
for boys and r = 0.87 to 0.97 for the girls). Partial correlation among
the estimated % BF derived from the three different methods in both genders
revealed a high significant correlations between the estimated %BF derived
from DXA and Slaughter equations (r = 0.76 for boys and 0.97 for girls).
While the correlation between the estimated %BF derived from DXA and BIA
was 0.77 for boys in contrast to girls where it is low significant correlation
(r = 0.387). Results suggest that BIA has limited utility in estimating
body composition, where as BMI and SFs seem to be more useful in estimating
body composition. In conclusion all methods are significantly under estimated
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