Evidence map›Paper›PMID 27045618›Full record

ArticleChildhood obesity (Print)2016

Comparison of Eight Equations That Predict Percent Body Fat Using Skinfolds in American Youth.

Kimberly P Truesdale, Amy Roberts, Jianwen Cai, Jerica M Berge, June Stevens

Abstract readComparative Study
In one paragraph

Article in Childhood obesity (Print), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Kimberly P Truesdale1 Department of Nutrition, School of Public Health, University of North Carolina , Chapel Hill, NC.
Amy Roberts1 Department of Nutrition, School of Public Health, University of North Carolina , Chapel Hill, NC.
Jianwen Cai3 Department of Biostatistics, School of Public Health, University of North Carolina , Chapel Hill, NC.
Jerica M Berge4 Department of Family Medicine and Community Health, University of Minnesota , Minneapolis, MN.
June Stevens1 Department of Nutrition, School of Public Health, University of North Carolina , Chapel Hill, NC.

Funding

UNIV OF NORTH CAROLINA CLINICAL NUTRITION RESEARCH UNITP30DK056350 · NIDDK · UNIV OF NORTH CAROLINA CHAPEL HILL · PI Ian Michael Carroll · 1999 to 2026
$31.6M
NIDDK NIH HHS P30 DK056350
6 · The paper itself

Abstract

backgroundSkinfolds are often used in equations to predict percent body fat (PBF) in youth. Although there are numerous such equations published, there is limited information to help researchers determine which equation to use for their sample.

methodsUsing data from the 1999-2006 National Health and Nutrition Examination Surveys (NHANES), we compared eight published equations for prediction of PBF. These published equations all included triceps and/or subscapular skinfold measurements. We examined the PBF equations in a nationally representative sample of American youth that was matched by age, sex, and race/ethnicity to the original equation development population and a full sample of 8- to 18-year-olds. We compared the equation-predicted PBF to the dual-emission X-ray absorptiometry (DXA)-measured PBF. The adjusted R(2), root mean square error (RMSE), and mean signed difference (MSD) were compared. The MSDs were used to examine accuracy and differential bias by age, sex, and race/ethnicity.

resultsWhen applied to the full range of 8- 18-year-old youth, the R(2) values ranged from 0.495 to 0.738. The MSD between predicted and DXA-measured PBF indicated high average accuracy (MSD between -1.0 and 1.0) for only three equations (Bray subscapular equation and Dezenberg equations [with and without race/ethnicity]). The majority of the equations showed differential bias by sex, race/ethnicity, weight status, or age.

conclusionsThese findings indicate that investigators should use caution in the selection of an equation to predict PBF in youth given that results may vary systematically in important subgroups.

Indexed as

Skinfold ThicknessAbsorptiometry, PhotonAdipose TissueAdolescentBody CompositionBody Fat DistributionChildHumansNorth CarolinaNutrition SurveysPediatric ObesityPredictive Value of TestsReproducibility of ResultsSex Factors

Identifiers

PMID27045618
PMCPMC4964757

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.