Ethnic differences in the association between body mass index and impedance index (Ht(2)/Z) in adult women and men using a leg-to-leg bioimpedance method


Siervo, M; Davies, AA; Jebb, SA; Jalil, F; Moore, SE; Prentice, AM; (2007) Ethnic differences in the association between body mass index and impedance index (Ht(2)/Z) in adult women and men using a leg-to-leg bioimpedance method. European journal of clinical nutrition, 61 (11). pp. 1337-1340. ISSN 0954-3007 DOI: https://doi.org/10.1038/sj.ejcn.1602678

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Abstract

Background: Ethnic differences in the association between body mass index (BMI) and body fat suggest that body composition varies across ethnic groups. Objective: To investigate the association between impedance index - a measure of tissue resistivity - and BMI in adults of different ethnic groups ( Asian Indians, West Africans and White Caucasians) living in their native countries. Methods: Male (n = 329) and female ( n 277) adult subjects ( 18 - 50 years) living in urban areas in the UK, The Gambia and Pakistan were studied. Body weight and height were measured and BMI calculated. The same leg-to-leg bioimpedance instrument was used in each study and impedance index (height(2)(cm)/impedance (Omega)) used as measure of tissue resistivity. Results: In women, Asian Indians and West Africans had a significantly greater increase in impedance index per unit increase in BMI compared with white Caucasians (P < 0.001). In men, Asian Indians had a significantly lower impedance index compared with West Africans and white Caucasians (P < 0.001). Conclusion: Different ethnic groups may have different tissue resistivity for the same BMI indicative of systematic differences in body composition.

Item Type: Article
Faculty and Department: Faculty of Epidemiology and Population Health > Dept of Population Health (2012- ) > Dept of Nutrition and Public Health Interventions Research (2003-2012)
Faculty of Epidemiology and Population Health > Dept of Population Health (2012- )
Research Centre: Centre for Global Non-Communicable Diseases (NCDs)
PubMed ID: 17299462
Web of Science ID: 250615700013
URI: http://researchonline.lshtm.ac.uk/id/eprint/8581

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