Journal of Preventive Medicine and Public Health

The Korean Society for Preventive Medicine (대한예방의학회)
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The Association between Bone Density at Os Calcis and Body Composition in Healthy Children Aged 9-12 Years

9-12세 정상 아동에서 종골 골밀도와 체성분의 연관성

  • Shin, Eun-Kyung (School of public health, Seoul National University) ;
  • Kim, Ki-Suk (School of public health, Seoul National University) ;
  • Kim, Hee-Young (School of public health, Seoul National University) ;
  • Lee, In-Sook (College of Nursing, Seoul National University) ;
  • Joung, Hyo-Jee (School of public health, Seoul National University) ;
  • Cho, Sung-Il (School of public health, Seoul National University)
  • Published : 2004.03.01
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Abstract

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 fat 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 20% 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.

Keywords

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