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Regional Percent Fat and Bone Mineral Density in Korean Adolescents: The Fourth Korea National Health and Nutrition Examination Survey (KNHANES IV-3), 2009

韓國青少年之局部體脂肪百分比及骨質密度:2009年第四次韓國國民健康及營養狀況調查

摘要


本研究藉由第四次韓國國民營養調查資料,評估青少年總脂肪及局部脂肪(軀幹、手臂和大腿)百分比,與總骨質密度及局部骨骼(手臂、大腿、肋骨、胸椎、腰椎、股骨近端及骨盆)骨密度的相關性。利用雙能量X光吸收儀,測量年齡介於10-19歲,以人口分佈為基礎抽樣的710位韓國青少年(365位男孩及345位女孩)的脂肪百分比及骨質密度。在校正年齡、身高、體重、血清維生素D、膳食鈣攝取量,以及青少女經期等變項後,以複雜樣本線性迴歸分析。結果顯示13至16歲的少年,總脂肪及局部脂肪百分比,與整體及局部骨質密度呈現負相關。然而,在其他年齡層的男孩,則不具有一致的相關。女孩方面,比起較低的年齡層,17-19歲的青少女之脂肪百分比與骨質密度的負相關性較為一致。雖然男孩之總脂肪及局部脂肪百分比,大多與胸椎、腰椎及股骨之骨質密度呈現負相關,但在女孩則多無顯著相關。將性別及年齡分層,軀幹脂肪與總骨密度呈現一致負相關,然而手臂及大腿的脂肪百分比與骨質密度關係則無一致性。結論,13至16歲的男孩及17至19歲的女孩,其局部脂肪對於所有部位的骨質密度具有不佳的影響,然而此相關只呈現在特定的性別及年齡層。

並列摘要


The effects of total and regional (trunk, arm, and leg) percent fat on total and regional (arm, leg, rib, thoracic spine, lumbar spine, proximal femur, and pelvis) bone mineral density (BMD) in Korean adolescents were examined using the Fourth Korea National Health and Nutrition Examination Survey, 2009. Percent fat and BMD were measured by dual energy X-ray absorptiometry in a population-based sample of 710 Korean adolescents (365 boys and 345 girls), aged 10-19 years. After adjusting for age, height, weight, serum vitamin D, dietary calcium intake, and menarche for girls in complex sampling linear regression analysis, higher total and regional percent fat were associated with low total BMD and BMD in all regions in boys aged 13-16 years, while the associations were inconsistent for early and late adolescent boys. In girls, the inverse associations were more consistent for those aged 17-19 years than for younger girls. While most of total and regional percent fat were negatively associated with BMD of thoracic and lumbar spine and femur in boys, most of these relationships were not significant in girls. The negative association with total BMD was consistent for trunk percent fat but variable for arm and leg percent fat according to age subgroup and gender. In conclusion, the unfavorable effect of regional percent fat on all regional BMD is more consistent in boys aged 13-16 years and in girls aged 17-19 years, while the relationship appears to be gender and age subgroup-specific.

參考文獻


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