Longitudinal BMI Growth Curves for Surviving Preterm NICU Infants Based on a Large US Sample

Pediatrics
Adrienne L WilliamsonM Louise Lawson

Abstract

Longitudinal growth curves, based on repeated measurements from the same group of infants, exist for preterm infant weight and length but not for BMI. Our existing BMI (weight divided by length squared) curves are based on cross-sectional birth data obtained from a different group of infants at each gestational age (GA). We calculated BMI over time for 68 693 preterm infants between 24 and 36 weeks GA. Stratifying infants by sex, GA at birth, and quintiles based on birth BMI, we created longitudinal median curves using R and validated the resulting curves for empirical fit, proper classification, and normality of z scores. We created 2 sets of BMI growth charts. The first set displays fitted median curves for all 5 percentile groups in each GA group by sex. The second set displays fitted median curves with their corresponding third and 97th percentiles by percentile group, GA, and sex. In the validation analysis, percentage of daily observations below the median curve approximated the expected 50th percentile after the initial 3 days. Unlike the cross-sectional curves, the longitudinal curves reveal the pattern of change corresponding to nadir; postnadir, these curves remained consistently below the cross-sectional curves and v...Continue Reading

References

Jul 1, 1992·Statistics in Medicine·T J Cole, P J Green
Jul 1, 1990·Archives of Disease in Childhood·N J BishopA Lucas
Aug 3, 1999·Pediatrics·R A EhrenkranzL A Papile
Mar 30, 2006·International Journal of Obesity : Journal of the International Association for the Study of Obesity·L Dubois, M Girard
Feb 6, 2008·Seminars in Perinatology·Patrick H Casey
Jan 27, 2010·Pediatrics·Irene E OlsenBabette S Zemel
Feb 5, 2013·Statistical Methods in Medical Research·Robert A Rigby, Dimitrios M Stasinopoulos
Feb 6, 2013·Nutrition & Diabetes·J C Jones-SmithL C H Fernald
Feb 26, 2013·Journal of Paediatrics and Child Health·Anna J WoodHeather E Jeffery
Aug 13, 2013·Archives of Disease in Childhood. Fetal and Neonatal Edition·Tim J ColeUNKNOWN Neonatal Data Analysis Unit and the Preterm Growth Investigator Group
May 31, 2014·Clinics in Perinatology·Reese H ClarkAlan R Spitzer
Feb 18, 2015·Pediatrics·Irene E OlsenReese H Clark
Jul 28, 2015·JAMA Pediatrics·Wade Harrison, David Goodman
Dec 13, 2016·Pediatrics·Ian M PaulValerie J Flaherman

❮ Previous
Next ❯

Citations

Sep 20, 2018·Pediatric Research·Gemma B ScholesMichael M H Cheung
Feb 7, 2020·Physiological Measurement·Camilo E ValderramaGari D Clifford
Feb 2, 2020·NeoReviews·Erika G Cordova, Mandy Brown Belfort
Aug 11, 2021·Scientific Reports·Xin-Nan ZongUNKNOWN Working Committee of the China National Newborn Growth Standards Project

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.