U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 close



Research
                Research Home
                            National Programs
                            Research Projects
                            Scientific Manuscripts
                            International Engagement
                            Scientific Software/Models
                            Databases and Datasets
                            Office of Scientific Quality Review
            Media
                News & Features
                            Multimedia
                            Briefing Room
                            Down on the Farm
                            Press Room
                            Science in Your Shopping Cart
                            Scientific Discoveries
                            Tellus
                            Under the Microscope
            About ARS
                About ARS Home
                            Staff Directory
                            Labs and Research Centers (Map)
                            Headquarter Offices
                            Organizational Chart
                            Employee Services (REE Employees Only)
                            Office of Outreach, Diversity, and Equal Opportunity
            Work With Us
                Work With Us Home
                            ARS Vacancies at USAJOBS
                            Careers at ARS Information
                            Scientific Collaborations
                            Extramural Agreements
                            1890 Faculty Research Sabbatical ProgramSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Northeast Area Beltsville, Maryland (BHNRC) Beltsville Human Nutrition Research Center Food Components and Health Laboratory Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Harris, Gabrielitem
                                            Stote, Kimitem
                                            Clevidence, Beverlyitem
                                            Paul, Daviditem
                                            Kramer, Matthewitem
                                            Baer, David
  Submitted to: Meeting Abstract
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 3/1/2007
                                    Publication  Date: 4/1/2007
                                    Citation: Harris, G.K., Stote, K.S., Clevidence, B.A., Paul, D.R., Kramer, M.H., Baer, D.J. 2007. BodPod Approximates Corrected DEXA Values More Closely Than BIA in Overweight and Obese Adults [abstract].  Federation of American Societies for Experimental Biology, April 28-May 2, 2007, Washington, DC.  21:679.2.Interpretive Summary:
                                Technical Abstract: Dual-absorbance x-ray absorptiometry (DEXA) is a rapid method for body fat estimation that correlates well with more time-consuming, technically challenging “gold standard” methods, and is relatively free of bias due to subject anthropometry.  Since radiation exposure limits the frequency of DEXA use, it is important to identify methods that correlate well with DEXA and can be used for frequent, repeated measures.  We compared body fat estimates by leg-to-leg bioelectrical impedance (BIA) and air-displacement plethysmography (BodPod) to DEXA scans taken twice over a 6-month period in otherwise healthy overweight/obese subjects (36 women; 29 men).  Independent sample t-tests comparing the slope and intercept of DEXA vs. BIA (DBIA) and DEXA vs. BodPod (DBod) regression lines for all study subjects found that the slope and intercept of the DBIA, but not the DBod, regression line differed significantly (P < 0.05 for slope and intercept comparisons) from the (DEXA vs. DEXA) line of identity.  The same results were observed when data for male and female subjects were examined separately, and when the women’s group was subdivided into African American (n = 12) and non-African American women (n = 24).  The men’s group was not subdivided by ethnicity because 27 of the 29 men were Caucasian.  F-tests comparing the standard errors of the slope and intercept for each group found a significant (P < 0.01 for slope and intercept comparisons) difference in scatter between the DBIA and DBod data only when all subjects were grouped together.  Our data indicate that BodPod, but not BIA, is a robust alternative to DEXA for body fat estimation, based on its similarity to DEXA values, and to an apparent lack of bias due to subject gender and ethnicity.  This research was supported by the US Department of Agriculture.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov