Data for: "Neonatal mortality risk for vulnerable newborn types in 15 countries using 125.5 million nationwide birth outcome records, 2000–2020" –User Guide

Persistent identifier

10.17037/DATA.00003690

Description

Data collected as part of a multi-country, population-based study to compare neonatal mortality risks by birthweight categories, gestational age, and newborn types.

Data collection method

We analysed routinely collected data on 125.5 million live births from 1 January 2000 to 31 December 2020 from 15 participating countries. Each country analysed their data and aggregated tables were shared online.

Data collection mode

Term	Description
Aggregation	Statistical information that has been processed (e.g. averaged, totalled) to the point where individuals cannot be identified. Country teams shared aggregated Excel tables
Compilation/Synthesis	Each country included data from nationwide administrative data on livebirths and neonatal deaths
Content Coding	Only aggregated output numbers included
Experiment	We calculated the following variables: Preterm (PT): A birth < 37 completed weeks of gestation as measured from the first day of the last menstrual period (LMP) or by early ultrasound. Term (T): A birth from 37 completed weeks of gestation as measured from the first day of the last menstrual period (LMP) or by early ultrasound. Small for gestational age (SGA): A birth with birthweight for gestational age and sex of <10th centile according to INTERGROWTH-21st international standards Appropriate for gestational age (AGA): A birth with a birthweight for gestational age and sex from 10th to 90th centiles according to INTERGROWTH-21st international standards Large for gestational age (LGA): A birth with a birthweight for gestational age and sex of >90th centile according to INTERGROWTH-21st international standards We performed the following experiments: Objective 1, by birthweight: A birth with birthweight <1000g, 1000g to 1500g, 1500g to 2000g, 2000g to 2500g, 4000g to 4500g, 4500g to 5000g and >5000g (vs 2500g to 3999g) Objective 2, by gestational age: <28 weeks, 28-31 weeks, 32-33 weeks, 34-36 weeks and >42 weeks (vs 37-42 weeks) Objective 3, by newborn types: PT + SGA, PT + AGA, PT + LGA, T + SGA, T + LGA (vs T + AGA)
Measurements and tests	Each live birth was categorised based on gestational age (preterm birth, up to 36+6 weeks [PT] or term, 37+0 weeks and above [T]), size for gestational age SGA, AGA, LGA) using the INTERGROWTH-21^st international newborn size for age and sex standards (extended to include newborns from 22+0 to 44+6). Preterm and SGA babies were excluded
Observation	Individual-level data on livebirths. Livebirths was defined as the complete expulsion or extraction from a woman of a fetus, irrespective of the duration of the pregnancy, which, after such separation, shows signs of life. Neonatal deaths where those occurring from 0-27 days after a live birth. Neonatal deaths were further classified into early (0-6 days) or late (7-27 days
Recording	Livebirths and neonatal deaths identified in national administrative datasets with three core variables (sex, gestational age and birthweight)
Summary	Summary tables in Excel

Geographic regions

Data were collated from 15 countries, representing three Sustainable Development Goals Regions (Latin America & the Caribbean; North America, Australia, New Zealand, Central Asia & Europe; and Western & North Asia) totalling 144 country-years from 2000 to 2020.

Key dates

Data capture period: 1 January 2000 to 31 December 2020
First edition published: 09 Nov 2023

Keywords

neonatal mortality, preterm birth, size for gestational age, vulnerable newborn

Language of written material

English

Project information

Project name	Funder/sponsor	Grant number
Vulnerable Newborns: multi-country analyses to advance measurement related to preterm births and small-for-gestational age	Children's Investment Fund Foundation	Prime grant 1803-02535

Creators

Forename	Surname	ORCID	Role
Lorena	Suárez-Idueta	0000-0003-0909-7737	Data Creator
Hannah	Blencowe	0000-0003-1556-3159	Data Creator
Yemisrach B.	Okwaraji	0000-0002-4541-2856	Data Creator
Judith	Yargawa	0000-0002-6299-2215	Data Creator
Ellen	Bradley	0009-0009-4457-0762	Data Creator
Adrienne	Gordon	0000-0002-2328-1066	Data Creator
Vicky	Flenady	0000-0001-8114-7677	Data Creator
Enny S.	Paixao	0000-0002-4797-908X	Data Creator
Mauricio	L. Barreto	0000-0002-0215-4930	Data Creator
Sarka	Lisonkova	0000-0002-1220-310X	Data Creator
Qi	Wen	Not available	Data Creator
Petr	Velebil	0009-0001-0643-1069	Data Creator
Jitka	Jírová	Not available	Data Creator
Erzsebet	Horváth-Puhó	0000-0002-3594-2212	Data Creator
Henrik Toft	Sørensen	0000-0003-4299-7040	Data Creator
Luule	Sakkeus	0000-0003-3785-183X	Data Creator
Lili	Abuladze	0000-0002-0109-9757	Data Creator
Khalid A.	Yunis	0000-0002-6384-2745	Data Creator
Ayah Al	Bizri	0000-0002-0677-7879	Data Creator
Arturo	Barranco	Not available	Data Creator
Lisa	Broeders	Not available	Data Creator
Aimée	E. van Dijk	Not available	Data Creator
Fawziya	Alyafei	0000-0001-6851-0654	Data Creator
Tawa O.	Olukade	0000-0002-2103-5355	Data Creator
Neda	Razaz	0000-0002-1273-0110	Data Creator
Jonas	Söderling	0000-0001-9006-2835	Data Creator
Lucy K.	Smith	0000-0001-9470-0793	Data Creator
Elizabeth S.	Draper	0000-0001-9340-8176	Data Creator
Estelle	Lowry	0000-0002-4655-416X	Data Creator
Neil	Rowland	0000-0001-9755-1682	Data Creator
Rachael	Wood	0000-0003-4453-623X	Data Creator
Kirsten	Monteath	Not available	Data Creator
Isabel	Pereyra	0000-0002-4696-8063	Data Creator
Gabriella	Pravia	0009-0006-5871-6257	Data Creator
Eric O.	Ohuma	0000-0002-3116-2593	Data Creator
Joy E.	Lawn	0000-0002-4573-1443	Data Creator

Associated roles

Forename	Surname	Institution	Role
Eric O.	Ohuma	London School of Hygiene & Tropical Medicine	Primary contact
Hannah	Blencowe	London School of Hygiene & Tropical Medicine	Primary contact

Research Centre

Maternal, Adolescent, Reproductive & Child Health (MARCH) Centre, London School of Hygiene & Tropical Medicine, London, United Kingdom

Research Group

Vulnerable Newborn Measurement Group

Participating institutions

London School of Hygiene & Tropical Medicine, London, United Kingdom
Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States

Copyright holder

London School of Hygiene & Tropical Medicine, London, United Kingdom

Related resources

Lawn JE, Ohuma EO, Bradley E, Idueta LS, Hazel E, Okwaraji YB, et al. Small babies, big risks: global estimates of prevalence and mortality for vulnerable newborns to accelerate change and improve counting. Vol. 401, The Lancet. Elsevier BV; 2023. p. 1707–19. Available from: https:// doi.org/10.1016/S0140-6736(23)00522-6
Lawn JE, Black R, Blencowe H, Ohuma E, Papageorghiou A. Vulnerable Newborns: multi-country analyses to advance measurement related to preterm births and small-for-gestational age. 2023. https://obgyn.onlinelibrary.wiley.com/doi/toc/10.1111/(ISSN)1471-0528.vulnerable-newborns

File description

Filename	Description	Access status	Licence
Mortality_Risks_Newborn_Types_Code	R code script to generate relevant variables and calculate the relative risks of neonatal mortality by size at birth and birthweight	Open	Creative Commons Attribution (CCBY)
Mortality_National_Newborn_Types_Data	Excel sheet with aggregated information from 15 countries. Each row represents one country-year and each column represent one variable. Three countries present overall data	Controlled	Data sharing agreement
Mortality_National_Newborn_codebook	Codebook for Mortality National Newborn Types dataset	Open	Creative Commons Attribution (CCBY)
3690_UserGuide	User guide for Mortality National Newborn Types dataset and code	Open	Creative Commons Attribution (CCBY)