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1 Department of Medicine, Obesity Research Center, St. Luke's-Roosevelt Hospital and College of Physicians & Surgeons, Columbia University, New York, NY, USA; Department of Pediatrics, Konkuk University Hospital Center and College of Medicine, Konkuk University, Seoul, Korea, Republic of
2 Department of Oriental Rehabilitation Medicine, College of Oriental Medicine, Kyunghee University, Seoul, Korea, Republic of
3 Department of Nuclear Medicine, College of Medicine, Kyunghee University, Seoul, Korea, Republic of
4 Department of Medicine, Obesity Research Center, St. Luke's-Roosevelt Hospital and College of Physicians & Surgeons, Columbia University, New York, NY, USA; Institute of Human Nutrition, Columbia University, New York, NY, USA
5 Department of Medicine, Obesity Research Center, St. Luke's-Roosevelt Hospital and College of Physicians & Surgeons, Columbia University, New York, NY, USA
* To whom correspondence should be addressed. E-mail: dg108{at}columbia.edu.
The aim of the study was to investigate in premenopausal women whether the relationship between percentage body fat (PBF) and body mass index (BMI=kg/m2) differs between Korean Asians (Ko-As) living in Seoul, South Korea, and Caucasians (Ca) living in New York City. Healthy premenopausal women (50 Ko-As; 38 Ca), ages 22-50 years, were studied. Weight, height, and PBF by dual energy X-ray absorptiometry (DXA) were measured. Total body DXA data were collected using GE-Lunar systems (Prodigy-Korea and DPXL-New York) and all scan analyses were performed by one technician in New York. Similar soft tissue phantoms were used for daily instrument calibrations at both sites. The relationship between PBF and BMI was assessed by multiple regression analysis with race, age, reciprocal of BMI (1/BMI), and a race by age interaction as the final independent variables. Race (P=0.003) and 1/BMI (P<0.001) were significantly related to PBF in this model. A significant race by age interaction (P=0.039) indicated that the slope of the lines for PBF vs. age differed between Ko-As and Ca. This study demonstrates in a Korean-Asian sample that the BMI-fat relationship differs significantly from that in a comparable group of Caucasian women. Investigators who use BMI as an index of fatness should be aware of the well documented differences in the relationship of BMI and fatness across race/ethnic groups.
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  K. P. Navder, Q. He, X. Zhang, S. He, L. Gong, Y. Sun, R. J. Deckelbaum, J. Thornton, and D. Gallagher Relationship between body mass index and adiposity in prepubertal children: ethnic and geographic comparisons between New York City and Jinan City (China) J Appl Physiol, August 1, 2009; 107(2): 488 - 493. [Abstract] [Full Text] [PDF]
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