Back to Search
Start Over
Body composition at birth and its relationship with neonatal anthropometric ratios: the newborn body composition study of the INTERGROWTH-21 st project.
- Source :
-
Pediatric research [Pediatr Res] 2017 Aug; Vol. 82 (2), pp. 305-316. Date of Electronic Publication: 2017 May 31. - Publication Year :
- 2017
-
Abstract
- BackgroundWe aimed to describe newborn body composition and identify which anthropometric ratio (weight/length; BMI; or ponderal index, PI) best predicts fat mass (FM) and fat-free mass (FFM).MethodsAir-displacement plethysmography (PEA POD) was used to estimate FM, FFM, and body fat percentage (BF%). Associations between FFM, FM, and BF% and weight/length, BMI, and PI were evaluated in 1,019 newborns using multivariate regression analysis. Charts for FM, FFM, and BF% were generated using a prescriptive subsample (n=247). Standards for the best-predicting anthropometric ratio were calculated utilizing the same population used for the INTERGROWTH-21 <superscript>st</superscript> Newborn Size Standards (n=20,479).ResultsFFM and FM increased consistently during late pregnancy. Differential FM, BF%, and FFM patterns were observed for those born preterm (34 <superscript>+0</superscript> -36 <superscript>+6</superscript> weeks' gestation) and with impaired intrauterine growth. Weight/length by gestational age (GA) was a better predictor of FFM and FM (adjusted R <superscript>2</superscript> =0.92 and 0.71, respectively) than BMI or PI, independent of sex, GA, and timing of measurement. Results were almost identical when only preterm newborns were studied. We present sex-specific centiles for weight/length ratio for GA.ConclusionsWeight/length best predicts newborn FFM and FM. There are differential FM, FFM, and BF% patterns by sex, GA, and size at birth.
- Subjects :
- Adult
Female
Growth
Humans
Infant, Newborn
Male
Pregnancy
Anthropometry
Body Composition
Subjects
Details
- Language :
- English
- ISSN :
- 1530-0447
- Volume :
- 82
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Pediatric research
- Publication Type :
- Academic Journal
- Accession number :
- 28445454
- Full Text :
- https://doi.org/10.1038/pr.2017.52