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KMID : 0371020040370010072
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Journal of Preventive Medicine and Public Health
2004 Volume.37 No. 1 p.72 ~ p.79
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The Association between Bone Density at Os Calcis and Body Composition in Healthy Children Aged 9-12 Years.
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Sin Eun-Gyeong
Kim Gi-Sug
Kim Hee-Young
Lee In-Sook
Joung Hyo-Jee
Cho Sung-Il
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Abstract
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Objectives: This cross-sectional study aimed to quantify the relationship between the bone mineral density at the os calcis and the body mass composition in healthy children.
Methods: The areal bone mineral density was measured at the os calcis with peripheral dual energy X-ray absorptiometry. The fat free mass, fat mass and percentage tat mass were measured using bioelectric impedance, in 237 Korean children, aged 9 to 12 years. The sexual maturity was determined by self assessment, using standardized series of the 5 Tanner stage drawings, accompanied by explanatory text.
Results: From multiple linear regression models, adjusted for age, sexual maturity and height, the fat free mass was found to be the best predictor of the calcaneal bone mineral density in both sexes. About 15 and 200/c, variabilities were found in the calcaneal bone mineral densities of the boys and girls, respectively, which can be explained by the fat free mass. After weight adjustment, the percentage fat mass was negatively associated with the calcaneal bone mineral density in both sexes.
Conclusions: The findings of this study suggest that the fat free mass, among the body compositions, is the major determinant of bone mineral density at the os calcis in Korean children aged 9 to 12 years. Obesity, defined as the percentage fat mass, is assumed to have a negative effect on the calcaneal bone density in children of the same weight.
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KEYWORD
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Bone density, Calcaneus, Body composition, Obesity, Sex Maturation
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