Document Detail


How well does the body adiposity index capture adiposity change in midlife women?: The SWAN fat patterning study.
MedLine Citation:
PMID:  23015468     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVES: The body adiposity index (BAI) is a proposed alternative to the body mass index (BMI) that has shown good cross-sectional agreement with percent body fat (%BF) in validation studies. The objective of this study was to examine the ability of BAI to track adiposity change over time in a biracial sample of midlife women.
METHODS: African-American (n = 159) and Caucasian (n = 206) women, aged 42-60 years, at the Chicago site of the Study of Women's Health Across the Nation were followed from 2002 to 2008. BAI and BMI were calculated from measurements taken at annual assessments. %BF was quantified using whole-body dual-energy X-ray absorptiometry. Difference scores (BAI(Δ) , BMI(Δ) , and %BF(Δ) ) quantified adiposity change over a mean of 1.6 (SD = 0.7) years. Lin's concordance correlation (ρ(c) ) and Bland-Altman limits-of-agreement assessed agreement between BAI and %BF.
RESULTS: In examining adiposity change, BAI(Δ) showed poor agreement with %BF(Δ) in the overall sample (ρ(c) = 0.41), African-American women (ρ(c) = 0.36), and Caucasian women (ρ(c) = 0.43). BAI(Δ) estimated %BF(Δ) with minimal bias (+0.4%) but low precision (±6.3%BF limits-of-agreement). %BF(Δ) had weaker correlations with BAI(Δ) (rs = 0.38-0.48) than with BMI(Δ) (rs = 0.48-0.59). BAI and BMI showed similar cross-sectional associations with %BF in the overall sample and within each race (rs > 0.74).
CONCLUSIONS: We conclude that BAI is less accurate than BMI in tracking adiposity change in midlife women, and would not be a suitable replacement for BMI in most research applications involving adiposity change.
Authors:
Bradley M Appelhans; Rasa Kazlauskaite; Kelly Karavolos; Imke Janssen; Howard M Kravitz; Sheila Dugan; John W Burns; Karla Shipp-Johnson; Lynda H Powell
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural     Date:  2012-09-27
Journal Detail:
Title:  American journal of human biology : the official journal of the Human Biology Council     Volume:  24     ISSN:  1520-6300     ISO Abbreviation:  Am. J. Hum. Biol.     Publication Date:    2012 Nov-Dec
Date Detail:
Created Date:  2012-10-18     Completed Date:  2013-03-25     Revised Date:  2013-11-06    
Medline Journal Info:
Nlm Unique ID:  8915029     Medline TA:  Am J Hum Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  866-9     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Wiley Periodicals, Inc.
Affiliation:
Department of Preventive Medicine, Rush University Medical Center, Chicago, Illinois, USA. brad_appelhans@rush.edu
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MeSH Terms
Descriptor/Qualifier:
Absorptiometry, Photon / methods*
Adiposity / ethnology
Adult
African Americans
Body Fat Distribution / methods*
Body Mass Index*
Chicago
European Continental Ancestry Group
Female
Humans
Middle Aged
Grant Support
ID/Acronym/Agency:
AG012495/AG/NIA NIH HHS; AG012505/AG/NIA NIH HHS; AG012531/AG/NIA NIH HHS; AG012535/AG/NIA NIH HHS; AG012539/AG/NIA NIH HHS; AG012546/AG/NIA NIH HHS; AG012553/AG/NIA NIH HHS; AG012554/AG/NIA NIH HHS; HL067128/HL/NHLBI NIH HHS; NR004061/NR/NINR NIH HHS; R01 HL067128/HL/NHLBI NIH HHS; U01 AG012495/AG/NIA NIH HHS; U01 AG012505/AG/NIA NIH HHS; U01 AG012531/AG/NIA NIH HHS; U01 AG012535/AG/NIA NIH HHS; U01 AG012539/AG/NIA NIH HHS; U01 AG012546/AG/NIA NIH HHS; U01 AG012553/AG/NIA NIH HHS; U01 AG012554/AG/NIA NIH HHS; U01 NR004061/NR/NINR NIH HHS
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