Document Detail

Fat and lean BMI reference curves in children and adolescents and their utility in identifying excess adiposity compared with BMI and percentage body fat.
MedLine Citation:
PMID:  23697708     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Body mass index (BMI) and percentage body fat (%BF) are widely used to assess adiposity. These indexes fail to account for independent contributions of fat mass (FM) and lean body mass (LBM) to body weight, which vary according to age, sex, pubertal status, and population ancestry in the pediatric population.
OBJECTIVE: The objective was to develop pediatric reference curves for fat mass index (FMI) and lean body mass index (LBMI) and evaluate the effects of population ancestry and LBM on measures of excess adiposity (BMI, %BF, and FMI).
DESIGN: Sex-specific FMI and LBMI reference curves relative to age for children and adolescents aged 8-20 y were generated from cross-sectional body-composition data measured by dual-energy X-ray absorptiometry from NHANES.
RESULTS: The mean LBMI z score was higher in blacks (males: 0.26; females: 0.45) than in whites (males: -0.07; females: -0.09) and Mexican Americans (males: 0.05; females: -0.09). The positive predictive value of overweight by BMI to identify excess adiposity defined by FMI was lower in blacks (males: 35.9%; females: 30.3%) than in whites (males: 65.4%; females: 52.2%) and Mexican Americans (males: 73.3%; females: 68.3%). Participants classified as having excess adiposity by FMI but normal adiposity by %BF had significantly higher BMI, LBMI, and height z scores than did those classified as having excess adiposity by %BF but normal adiposity by FMI.
CONCLUSIONS: Relative to FMI, the prevalence of excess adiposity is overestimated by BMI in blacks and underestimated by %BF in individuals with high LBM. The use of FMI and LBMI improves on the use of %BF and BMI by allowing for the independent assessment of FM and LBM.
David R Weber; Reneé H Moore; Mary B Leonard; Babette S Zemel
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural     Date:  2013-05-22
Journal Detail:
Title:  The American journal of clinical nutrition     Volume:  98     ISSN:  1938-3207     ISO Abbreviation:  Am. J. Clin. Nutr.     Publication Date:  2013 Jul 
Date Detail:
Created Date:  2013-06-21     Completed Date:  2013-08-26     Revised Date:  2014-07-01    
Medline Journal Info:
Nlm Unique ID:  0376027     Medline TA:  Am J Clin Nutr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  49-56     Citation Subset:  AIM; IM    
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MeSH Terms
Absorptiometry, Photon
Adipose Tissue*
African Continental Ancestry Group
Body Composition
Body Mass Index*
Body Weight
Cross-Sectional Studies
European Continental Ancestry Group
Mexican Americans
Nutrition Surveys
Obesity / epidemiology
Predictive Value of Tests
Reference Values
United States / epidemiology
Young Adult
Grant Support
Comment In:
Am J Clin Nutr. 2013 Nov;98(5):1368-9   [PMID:  24142240 ]
Am J Clin Nutr. 2013 Nov;98(5):1367   [PMID:  24142239 ]
Am J Clin Nutr. 2013 Jul;98(1):1-3   [PMID:  23719556 ]

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