TY - JOUR
T1 - New option in the Lives Saved Tool (LiST) allows for the conversion of prevalence of small-for-gestational-age and preterm births to prevalence of low birth weight
AU - the Child Health Epidemiology Reference Group SGA-Preterm Birth Working Group
AU - Kozuki, Naoko
AU - Katz, Joanne
AU - Clermont, Adrienne
AU - Walker, Neff
AU - Adair, Linda
AU - Barros, Fernando
AU - Caulfield, Laura
AU - Christian, Parul
AU - Humphrey, Jean
AU - Huybregts, Lieven
AU - Lusingu, John
AU - Mongkolchati, Aroonsri
AU - Mullany, Luke
AU - Osrin, David
AU - Roberfroid, Dominique
AU - Schmiegelow, Christentze
AU - Silveira, Mariangela
AU - Tielsch, James
AU - Victora, Cesar
N1 - Funding Information:
Published in a supplement to The Journal of Nutrition. This article is part of a project to update the nutrition modeling components of the Lives Saved Tool (LiST), which is supported by a grant from the Children®s Investment Fund Foundation (CIFF). LiST is developed and maintained by the Institute for International Programs at Johns Hopkins Bloomberg School of Public Health, with support from the Bill & Melinda Gates Foundation. The Supplement Coordinator for the supplement publication is Adrienne Clermont. Supplement Coordinator disclosures: Adrienne Clermont is a member of the project team at Johns Hopkins Bloomberg School of Public Health that is implementing the CIFF-funded project that this supplement is a part of. As a result, part of her salary is paid through the grant from CIFF. The article contents are the responsibility of the authors and do not necessarily represent the official views of institutions or sponsors involved. Publication costs for this supplement were defrayed in part by the payment of page charges. This publication must therefore be hereby marked "advertisement" in accordance with 18 USC section 1734 solely to indicate this fact. The opinions expressed in this publication are those of the authors and are not attributable to the sponsors or the publisher, Editor, or Editorial Board of The Journal of Nutrition. Supported by the Children®s Investment Fund Foundation. Author disclosures: NK, JK, AC, and NW, no conflicts of interest. Address correspondence to JK (e-mail: jkatz1@jhu.edu). Abbreviations used: AGA, appropriate-for-gestational-age; LBW, low birth weight; LiST, Lives Saved Tool; LMIC, low-and middle-income country; SGA, small-for-gestational-age; WHA, World Health Assembly.
Publisher Copyright:
© 2017 American Society for Nutrition.
PY - 2017/11/1
Y1 - 2017/11/1
N2 - Background: The Lives Saved Tool (LiST) is a software model that estimates the health impact of scaling up interventions on maternal and child health. One of the outputs of the model is an estimation of births by fetal size [appropriate-forgestational- age (AGA) or small-for-gestational-age (SGA)] and by length of gestation (term or preterm), both of which influence birth weight. LiST uses prevalence estimates of births in these categories rather than of birth weight categories, because the causes and health consequences differ between SGA and preterm birth. The World Health Assembly nutrition plan, however, has set the prevalence of low birth weight (LBW) as a key indicator, with a specific goal of a 30% reduction in LBW prevalence by 2025. Objective: The objective of the study is to develop an algorithm that will allow LiST users to estimate changes in prevalence of LBW on the basis of changes in coverage of interventions and the resulting impact on prevalence estimates of SGA and preterm births. Methods: The study used 13 prospective cohort data sets from low- and middle-income countries (LMICs; 4 from sub- Saharan Africa, 5 from Asia, and 4 from Latin America), with reliable measures of gestational age and birth weight. By calculating the proportion of LBW births among SGA and preterm births in each data set and meta-analyzing those estimates, we calculated region-specific pooled rates of LBW among SGA and preterm births. Results: In Africa, 0.4% of term-AGA, 36.7% of term-SGA, 49.3% of preterm-AGA, and 100.0% of preterm-SGA births were LBW. In Asia, 1.0% of term-SGA, 47.0% of term-SGA, 36.7% of preterm-AGA, and 100.0% of preterm-SGA births were LBW. In Latin America, 0.4% of term-AGA, 34.4% of term-SGA, 32.3% of preterm-AGA, and 100.0% of preterm- SGA births were LBW. Conclusions: The simple conversion factor proposed here allows for the estimation of LBW within LiST for most LMICs. This will allow LiST users to approximate the impact of their health programs on LBW prevalence via the impact on SGA and preterm prevalence.
AB - Background: The Lives Saved Tool (LiST) is a software model that estimates the health impact of scaling up interventions on maternal and child health. One of the outputs of the model is an estimation of births by fetal size [appropriate-forgestational- age (AGA) or small-for-gestational-age (SGA)] and by length of gestation (term or preterm), both of which influence birth weight. LiST uses prevalence estimates of births in these categories rather than of birth weight categories, because the causes and health consequences differ between SGA and preterm birth. The World Health Assembly nutrition plan, however, has set the prevalence of low birth weight (LBW) as a key indicator, with a specific goal of a 30% reduction in LBW prevalence by 2025. Objective: The objective of the study is to develop an algorithm that will allow LiST users to estimate changes in prevalence of LBW on the basis of changes in coverage of interventions and the resulting impact on prevalence estimates of SGA and preterm births. Methods: The study used 13 prospective cohort data sets from low- and middle-income countries (LMICs; 4 from sub- Saharan Africa, 5 from Asia, and 4 from Latin America), with reliable measures of gestational age and birth weight. By calculating the proportion of LBW births among SGA and preterm births in each data set and meta-analyzing those estimates, we calculated region-specific pooled rates of LBW among SGA and preterm births. Results: In Africa, 0.4% of term-AGA, 36.7% of term-SGA, 49.3% of preterm-AGA, and 100.0% of preterm-SGA births were LBW. In Asia, 1.0% of term-SGA, 47.0% of term-SGA, 36.7% of preterm-AGA, and 100.0% of preterm-SGA births were LBW. In Latin America, 0.4% of term-AGA, 34.4% of term-SGA, 32.3% of preterm-AGA, and 100.0% of preterm- SGA births were LBW. Conclusions: The simple conversion factor proposed here allows for the estimation of LBW within LiST for most LMICs. This will allow LiST users to approximate the impact of their health programs on LBW prevalence via the impact on SGA and preterm prevalence.
KW - Lives Saved Tool
KW - Low birth weight
KW - Neonatal health
KW - Preterm birth
KW - Small-for-gestational age
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U2 - 10.3945/jn.117.247767
DO - 10.3945/jn.117.247767
M3 - Article
C2 - 28904115
AN - SCOPUS:85032720807
SN - 0022-3166
VL - 147
SP - 2141S-2146S
JO - Journal of Nutrition
JF - Journal of Nutrition
IS - 11
ER -