Osteoporosis International

, Volume 22, Issue 12, pp 3029–3035

Relationships of percent body fat and percent trunk fat with bone mineral density among Chinese, black, and white subjects

  • H. Lu
  • X. Fu
  • X. Ma
  • Z. Wu
  • W. He
  • Z. Wang
  • D. B. Allison
  • S. B. Heymsfield
  • S. Zhu
Original Article

DOI: 10.1007/s00198-010-1522-9

Cite this article as:
Lu, H., Fu, X., Ma, X. et al. Osteoporos Int (2011) 22: 3029. doi:10.1007/s00198-010-1522-9

Abstract

Summary

We examined ethnic difference in the association of body fat and trunk fat with bone mineral density (BMD) among Chinese, white, and black subjects. We found that, with greater body and trunk fat, both white and black subjects were more likely to have a low BMD than Chinese subjects.

Introduction

Ethnic differences in body fat, abdominal fat distribution, and BMD have been found in previous studies between Chinese and white subjects. However, the associations of body fat and abdominal fat distribution with BMD have not been studied, and whether the ethnic differences have an effect on these associations is unclear.

Methods

We evaluated 1,147 subjects aged ≥18 years (805 Chinese, 193 whites, and 149 blacks). Percent body fat (%BF), percent trunk fat (%TF), and total and regional BMD including that of head, arm, leg, trunk, rib, spine, and pelvis were measured by dual-energy X-ray absorptiometry. Linear regression models were developed to test the association of ethnicity, %BF, and interaction between ethnicity and %BF with BMD. The models were repeated again, replacing %BF with %TF.

Results

Chinese subjects showed lower BMD in total and most regions compared with black and white subjects; however, these differences were eliminated between Chinese and whites within both sexes and between Chinese and black men when age, weight, height, and %BF were added. %BF and %TF were negatively associated with most regional body BMD. The interactions between %BF, %TF, and ethnicity were found in most regional body BMD among Chinese, white, and black subjects for both men and women.

Conclusion

Both %BF and %TF have negative associations with BMD. With greater accumulation of %BF and %TF, both white and black subjects may experience a higher risk of low BMD than Chinese subjects.

Keywords

Bone mineral density Ethnicity Percent body fat Percent trunk fat 

Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2011

Authors and Affiliations

  • H. Lu
    • 1
  • X. Fu
    • 1
  • X. Ma
    • 2
  • Z. Wu
    • 3
  • W. He
    • 1
  • Z. Wang
    • 4
  • D. B. Allison
    • 5
  • S. B. Heymsfield
    • 6
  • S. Zhu
    • 1
  1. 1.Obesity and Body Composition Research CenterZhejiang University School of Public HealthHangzhouChina
  2. 2.Injury Research CenterMedical College of WisconsinMilwaukeeUSA
  3. 3.Department of OrthopedicsPeking Union Medical College HospitalBeijingChina
  4. 4.Obesity Research Center, St. Luke’s-Roosevelt HospitalColumbia University College of Physicians and SurgeonsNew YorkUSA
  5. 5.Department of Nutrition Sciences and the Clinical Nutrition Research CenterUniversity of Alabama at BirminghamBirminghamUSA
  6. 6.Merck & Co.RahwayUSA

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