Validation of simple epidemiological or clinical methods for the measurement of body composition in young children

Kurosh Djafarian, Diane M Jackson, Zoe Donaghy, John R Speakman, John J Reilly

Research output: Contribution to journalArticle

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Abstract

The present study aimed to determine the validity of simple epidemiological and clinical methods for the assessment of body fatness in preschool children. In 89 children (42 boys, 47 girls; mean age 4.1 SD 1.3y) measures of body fatness were made using total body water (TBW), dual energy x-ray absorptiometry (DXA), air displacement plethysmography (BODPOD) and skinfold thickness. Methods were compared by Bland–Altman analysis using TBW as the reference method, and by paired comparisons and rank order correlations. Bias for DXA was +1.8% body fat percentage units (limits of agreement +15.5% to -11.9%), bias for BODPOD was -3.5% (limits of agreement +18.9% to -5.9%) and bias for skinfolds using the Slaughter equations was -6.5% (limits of agreement +10.0% to –23.1%). Significant rank order correlations with TBW measures of fatness were obtained for DXA estimates of fatness (r=0.54, P=0.01), but not for estimates of fat by skinfold thickness (r=0.20, P=0.2) or BODPOD (r=0.25, P=0.1). Differences between both DXA and BODPOD and the reference TBW estimates of body fatness were not significant (P=0.06 and P=0.1 respectively); however, the difference in estimated body fatness between skinfold thickness and TBW was significant (P<0.001). Estimates of body fatness in preschool children were inaccurate at the level of the individual child using all the methods, but DXA might provide unbiased estimates and a means of making relative assessments of body fatness.
LanguageEnglish
Pages685-691
Number of pages7
JournalIranian Journal of Pediatrics
Volume24
Issue number6
Publication statusPublished - Dec 2014

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Body Water
Body Composition
Skinfold Thickness
X-Rays
Body Weights and Measures
Preschool Children
Epidemiologic Methods
Matched-Pair Analysis
Plethysmography
Adipose Tissue
Fats
Air

Keywords

  • body composition
  • preschoolers
  • skinfold thickness
  • body fatness

Cite this

Djafarian, Kurosh ; Jackson, Diane M ; Donaghy, Zoe ; Speakman, John R ; Reilly, John J. / Validation of simple epidemiological or clinical methods for the measurement of body composition in young children. In: Iranian Journal of Pediatrics. 2014 ; Vol. 24, No. 6. pp. 685-691.
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Validation of simple epidemiological or clinical methods for the measurement of body composition in young children. / Djafarian, Kurosh; Jackson, Diane M; Donaghy, Zoe; Speakman, John R; Reilly, John J.

In: Iranian Journal of Pediatrics, Vol. 24, No. 6, 12.2014, p. 685-691.

Research output: Contribution to journalArticle

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AU - Djafarian, Kurosh

AU - Jackson, Diane M

AU - Donaghy, Zoe

AU - Speakman, John R

AU - Reilly, John J

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AB - The present study aimed to determine the validity of simple epidemiological and clinical methods for the assessment of body fatness in preschool children. In 89 children (42 boys, 47 girls; mean age 4.1 SD 1.3y) measures of body fatness were made using total body water (TBW), dual energy x-ray absorptiometry (DXA), air displacement plethysmography (BODPOD) and skinfold thickness. Methods were compared by Bland–Altman analysis using TBW as the reference method, and by paired comparisons and rank order correlations. Bias for DXA was +1.8% body fat percentage units (limits of agreement +15.5% to -11.9%), bias for BODPOD was -3.5% (limits of agreement +18.9% to -5.9%) and bias for skinfolds using the Slaughter equations was -6.5% (limits of agreement +10.0% to –23.1%). Significant rank order correlations with TBW measures of fatness were obtained for DXA estimates of fatness (r=0.54, P=0.01), but not for estimates of fat by skinfold thickness (r=0.20, P=0.2) or BODPOD (r=0.25, P=0.1). Differences between both DXA and BODPOD and the reference TBW estimates of body fatness were not significant (P=0.06 and P=0.1 respectively); however, the difference in estimated body fatness between skinfold thickness and TBW was significant (P<0.001). Estimates of body fatness in preschool children were inaccurate at the level of the individual child using all the methods, but DXA might provide unbiased estimates and a means of making relative assessments of body fatness.

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