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Body fat is differentially related to body mass index in U.S.-born African-American and East African immigrant girls†
Article first published online: 25 JUL 2011
Copyright © 2011 Wiley-Liss, Inc.
American Journal of Human Biology
Volume 23, Issue 5, pages 720–723, September/October 2011
How to Cite
Meyer, K. A., Demerath, E. W., Friend, S., Hannan, P. J. and Neumark-Sztainer, D. (2011), Body fat is differentially related to body mass index in U.S.-born African-American and East African immigrant girls. Am. J. Hum. Biol., 23: 720–723. doi: 10.1002/ajhb.21201
- Issue published online: 5 AUG 2011
- Article first published online: 25 JUL 2011
- Manuscript Accepted: 27 MAY 2011
- Manuscript Revised: 22 APR 2011
- Manuscript Received: 27 JAN 2011
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health. Grant Number: R01 DK063107
- National Heart, Lung, and Blood Institute, National Institutes of Health, and Cardiovascular Disease Epidemiology and Prevention. Grant Number: T32 HL07779
- National Center for Research Resources, National Institutes of Health. Grant Number: M01-RR00400
To examine ethnic differences in adiposity at a given body mass index (BMI) in a sample of U.S.-born African-American and East African immigrant adolescent girls.
In a sample of black adolescent girls (n = 79; ages 14–20) we compared measures of adiposity across the range of BMI-for-age among 55 U.S.-born African-American (mean BMI: 30.4; age: 15.4) and 24 East African immigrant girls (mean BMI: 21.8; age: 16.7). Fat and fat-free mass were assessed with dual-energy X-ray absorptiometry (DXA). We used spline regression to examine the distributions of fat mass index and percent body fat across the range of BMI-for-age z-scores.
Compared with African-American girls, East African girls were smaller on all body measures, but appeared to have higher fat mass index and percent body fat at the same BMI-for-age.
Our findings indicate that at a given BMI East African immigrants may have greater adiposity than African-American girls. If corroborated in larger samples, our data suggest that the cardiometabolic risks attendant to elevated adiposity may affect East African girls at a lower BMI than in African-American girls. Am. J. Hum. Biol., 2011. © 2011 Wiley-Liss, Inc.