title: The Relationship between Body Fat Percent and Bone Mineral Density in Korean Adolescents: The Fifth Korea National Health and Nutrition Examination Survey (KNHANES V-1), 2010.
abstract: BACKGROUND
  The relationships of total and regional body fat percent with bone mineral density (BMD) in Korean adolescents were examined using the Fifth Korea National Health and Nutrition Examination Survey (KNHANES V-1), 2010.
  
  
  METHODS
  Body fat percent at whole body (WBFP), trunk (TBFP), and extremities (both upper and lower extremities fat mass/body weight, EBFP), ratio of trunk fat mass to extremities fat mass (TEFR), and BMD at whole body, total femur, and lumbar spine were measured by dual energy X-ray absorptiometry in a population-based sample of 433 boys and 362 girls, aged 12 to 18 years. The analyses were conducted using linear regression analysis with complex sampling design.
  
  
  RESULTS
  After adjusting for confounders such as age, height, weight, serum 25-(OH) vitamin D concentration, energy intake, calcium intake, physical activity, and menarche status for girls, WBFP, TBFP, and EBFP were inversely associated with whole and regional BMD in both sexes (P < 0.05). TEFR was positively associated with whole and regional BMD in boys after adjusting for confounders, while it was negatively associated in girls (P < 0.05). However, the associations were non-significant when bone mass-free lean mass was adjusted instead of bodyweight except for a positive association between TEFR and BMD in boys.
  
  
  CONCLUSIONS
  In Korean adolescents, total and regional body fat percent is not independently associated with BMD after adjusting for bone mass-free lean mass but higher fat in trunk as compared to extremities may be protective for BMD in boys.
authors.affiliation: Department of Family Medicine, Busan Paik Hospital, College of Medicine, Inje University, Busan, Korea.
authors.forename: Hee-Cheol
authors.initials: HC
authors.lastname: Jeon
authors.affiliation: Department of Family Medicine, Busan Paik Hospital, College of Medicine, Inje University, Busan, Korea.
authors.forename: Kayoung
authors.initials: K
authors.lastname: Lee
authors.affiliation: Department of Family Medicine, Busan Paik Hospital, College of Medicine, Inje University, Busan, Korea.
authors.forename: Jinseung
authors.initials: J
authors.lastname: Kim
authors.affiliation: Department of Family Medicine, Busan Paik Hospital, College of Medicine, Inje University, Busan, Korea.
authors.forename: Tae-Jin
authors.initials: TJ
authors.lastname: Park
authors.affiliation: Department of Family Medicine, Busan Paik Hospital, College of Medicine, Inje University, Busan, Korea.
authors.forename: Dae-Won
authors.initials: DW
authors.lastname: Kang
authors.affiliation: Department of Family Medicine, Busan Paik Hospital, College of Medicine, Inje University, Busan, Korea.
authors.forename: Da-Jung
authors.initials: DJ
authors.lastname: Park
keywords: Adipose Tissue; Adolescent; Bone Density