Data for: “Vulnerable newborn types: Analysis of population-based registries for 165 million births in 23 countries, 2000–2021” – User Guide

Permanent identifier

10.17037/DATA.00003287

Description

Data collected as part of a multi-country, population-based study to explore the prevalence of Vulnerable Newborn Types combining gestational age (preterm vs term) and size of the newborn (small for gestational age [SGA <10^th centile], appropriate for gestational age [AGA, 10^th to 90^th centiles] and large for gestational age [LGA, >90^th centile]) in 23 countries.

Data type

Dataset – quantitative

Data collection methods

We analysed routinely collected data on 165 million live births from 1 January 2000 to 31 December 2021 from 23 participating countries. Each country analysed their data and aggregated tables were shared online.

Data capture 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
Content Coding	Only aggregated output numbers included
Experiment	We calculated the following variables: Preterm birth: A birth before 37 completed weeks of gestation (or before 259 days of gestation) as measured from the first day of the last menstrual period (LMP) or by early ultrasound. Term birth: 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: A birth with a birthweight for gestational age and sex of <10th centile according to INTERGROWTH-21st international standards Appropriate for gestational age: 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: A birth with a birthweight for gestational age and sex of >90th centile according to INTERGROWTH-21st international standards
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)
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
Recording	Livebirths identified in national administrative datasets with three core variables (sex, gestational age and birthweight)
Summary	Summary tables in Excel

Geographic regions

The final data set consisted of 165 017 419 records (97.1% of identified live births). The SDG region of North America, Australia, New Zealand, Central Asia and Europe contributed with 100.9 (61.2%) million live births, followed by Latin America and the Caribbean with 53.7 million (32.6%), western Asia and North Africa contributed 5.4 million (3.3%) and eastern Asia, South-East Asia, and Oceania had 4.9 (3.0%) million live births.

Key dates

Data capture period: 1 January 2000 to 31 December 2021
Completed date: 25 May 2023

Keywords

low birthweight, newborn, preterm birth, size for gestational age

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	Prime grant 1803-02535	Children's Investment Fund Foundation

Creators

Forename	Surname	Institution	ORCID	Role
Lorena	Suárez-Idueta		0000-0003-0909-7737	Data Creator
Judith	Yargawa		0000-0002-6299-2215	Data Creator
Hannah	Blencowe		0000-0003-1556-3159	Data Creator
Ellen	Bradley		0009-0009-4457-0762	Data Creator
Yemisrach B.	Okwaraji		0000-0002-4541-2856	Data Creator
Veronica	Pingray		0000-0002-7889-2825	Data Creator
Luz	Gibbons		0000-0002-0235-1635	Data Creator
Adrienne	Gordon		0000-0002-2328-1066	Data Creator
Kara	Warrilow		0000-0001-8742-1278	Data Creator
Enny S.	Paixao		0000-0002-4797-908X	Data Creator
Ila Rocha	Falcão		0000-0001-6961-3858	Data Creator
Sarka	Lisonkova		0000-0002-1220-310X	Data Creator
Francisco	Mardones		0000-0002-0905-9493	Data Creator
Raúl	Caulier-Cisterna		0000-0002-0125-485X	Data Creator
Petr	Velebil		0009-0001-0643-1069	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
Mika	Gissler		0000-0001-8254-7525	Data Creator
Mohammad	Heidarzadeh		0000-0002-4159-8294	Data Creator
Maziar	Moradi-Lakeh		0000-0001-7381-5305	Data Creator
Khalid A.	Yunis		0000-0002-6384-2745	Data Creator
Ayah Al	Bizri		0000-0002-0677-7879	Data Creator
Shamala D.	Karalasingam		0000-0002-4992-906X	Data Creator
Ravichandran	Jeganathan		0000-0002-3994-1452	Data Creator
Luis	Huicho		0000-0002-5272-5885	Data Creator
Hugo Guillermo	Quezada-Pinedo		0000-0002-0641-7718	Data Creator
Kim Nail	Cajachagua-Torres		0000-0002-0213-6935	Data Creator
Fawziya	Alyafei		0000-0001-6851-0654	Data Creator
Geum Joon	Cho		0000-0001-6761-0944	Data Creator
Ho Yeon	Kim		0000-0002-6469-8140	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
Estelle	Lowry		0000-0002-4655-416X	Data Creator
Neil	Rowland		0000-0001-9755-1682	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	Faculty / Dept	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, UK

Research Group

Vulnerable Newborn Measurement Group

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

Participating institutions

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

File description

Filename	Description	Access status	Licence
Prevalence_National_Code	R code script to generate relevant variables and calculate the prevalence and time trends of vulnerable types combining birthweight, gestational age, and size at birth	Open	Creative Commons Attribution (CCBY)
Prevalence_National_Data	Excel sheet with aggregated information from 23 countries. Each row represents one country-year and each column represent one variable	Controlled	Data sharing agreement
Prevalence_National_Data_Codebook	Codebook for Prevalence National Dataset	Open	Creative Commons Attribution (CCBY)
3287_UserGuide	User guide for Prevalence National data and code	Open	Creative Commons Attribution (CCBY)