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

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

Research output: Contribution to journalArticle

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Abstract

OBJECTIVE: The present study aimed to determine the validity of simple epidemiological and clinical methods for the assessment of body fatness in preschool children.

METHODS: 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.

FINDINGS: 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).

CONCLUSION: 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.

Original languageEnglish
Pages (from-to)685-691
Number of pages7
JournalIranian journal of pediatrics
Volume24
Issue number6
Early online date16 Aug 2014
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

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Validation of simple epidemiological or clinical methods for the measurement of body composition in young children. / Jackson, Diane M; Donaghy, Zoe; Djafarian, Kurosh; Reilly, John J.

In: Iranian journal of pediatrics, Vol. 24, No. 6, 12.2014, p. 685-691.

Research output: Contribution to journalArticle

Jackson, Diane M ; Donaghy, Zoe ; Djafarian, Kurosh ; 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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abstract = "OBJECTIVE: The present study aimed to determine the validity of simple epidemiological and clinical methods for the assessment of body fatness in preschool children.METHODS: 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.FINDINGS: 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).CONCLUSION: 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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note = "Acknowledgment The authors have no conflicts of interest to declare. The authors thank the RASCAL families for their participation in the study. The study was funded by the Scottish Executive Environmental and Rural Affairs Department (SEERAD) and Tehran University of Medical Sciences scholarship to Kurosh Djafarian. The funding body had no role in the content of the manuscript or the decision to publish.",
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AU - Donaghy, Zoe

AU - Djafarian, Kurosh

AU - Reilly, John J

N1 - Acknowledgment The authors have no conflicts of interest to declare. The authors thank the RASCAL families for their participation in the study. The study was funded by the Scottish Executive Environmental and Rural Affairs Department (SEERAD) and Tehran University of Medical Sciences scholarship to Kurosh Djafarian. The funding body had no role in the content of the manuscript or the decision to publish.

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N2 - OBJECTIVE: The present study aimed to determine the validity of simple epidemiological and clinical methods for the assessment of body fatness in preschool children.METHODS: 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.FINDINGS: 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).CONCLUSION: 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.

AB - OBJECTIVE: The present study aimed to determine the validity of simple epidemiological and clinical methods for the assessment of body fatness in preschool children.METHODS: 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.FINDINGS: 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).CONCLUSION: 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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VL - 24

SP - 685

EP - 691

JO - Iranian journal of pediatrics

JF - Iranian journal of pediatrics

SN - 2008-2142

IS - 6

ER -