Associations between body mass index and body composition measures in a birth cohort

Teresa A Marshall; Alexandra M Curtis; Joseph E Cavanaugh; John J Warren; Steven M Levy

doi:10.1038/s41390-021-01562-y

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Associations between body mass index and body composition measures in a birth cohort

Journal article

Peer reviewed

Associations between body mass index and body composition measures in a birth cohort

Teresa A Marshall, Alexandra M Curtis, Joseph E Cavanaugh, John J Warren and Steven M Levy

Pediatric research, Vol.91(6), pp.1606-1615

05/10/2021

DOI: 10.1038/s41390-021-01562-y

PMCID: PMC8578575

PMID: 33972687

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https://www.ncbi.nlm.nih.gov/pmc/articles/8578575View

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Abstract

Associations among body composition measures have been limited to cross-sectional analyses of different subjects. We identified cross-sectional relationships between body mass index (BMI) and other body composition measures and predicted body composition measures from BMI throughout childhood and adolescence. BMI was calculated and % body fat (%BF), fat mass index (FMI), and fat-free mass index (FFMI) were measured using dual-energy x-ray absorptiometry at ages 5, 9, 11, 13, 15, and 17 years in a birth cohort (n = 629). Sex-specific body composition measures were calculated for BMI-for-age percentiles; associations between BMI and body composition measures were characterized; and body composition measures were predicted from BMI. %BF, FMI, and FFMI generally increased with BMI-for-age percentiles at each age. Correlations between BMI and %BF or FMI were generally higher at BMI-for-age percentiles ≥95% than for lower BMI-for-age percentiles. Correlations between BMI and FFMI were generally higher for participants at very low and very high BMI-for-age percentiles than at moderate BMI-for-age percentiles. Age- and sex-specific predictions from BMI are provided for %BF, FM, and FFMI. Sex-specific body composition measures throughout childhood and adolescence are presented. BMI is a better indicator of adiposity at higher than at lower BMI values. Sex-specific body composition measures throughout childhood and adolescence are described. % BF, FMI, and FFMI generally increased with BMI-for-age percentiles for both sexes throughout childhood and adolescence. BMI is a better indicator of adiposity at higher BMI levels than at lower BMI values throughout childhood and adolescence.

Details

Title: Subtitle: Associations between body mass index and body composition measures in a birth cohort
Creators: Teresa A Marshall - University of Iowa
Alexandra M Curtis - University of Iowa
Joseph E Cavanaugh - University of Iowa
John J Warren - University of Iowa
Steven M Levy - University of Iowa
Resource Type: Journal article
Publication Details: Pediatric research, Vol.91(6), pp.1606-1615
DOI: 10.1038/s41390-021-01562-y
PMID: 33972687
PMCID: PMC8578575
NLM abbreviation: Pediatr Res
ISSN: 0031-3998
eISSN: 1530-0447
Language: English
Date published: 05/10/2021
Academic Unit: Statistics and Actuarial Science; Preventive and Community Dentistry; Epidemiology; Biostatistics; Injury Prevention Research Center
Record Identifier: 9984226815202771

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