Evidence map›Paper›PMID 31132994›Full record

ArticleBMC pediatrics2019

An outcome-based definition of low birthweight for births in low- and middle-income countries: a secondary analysis of the WHO global survey on maternal and perinatal health.

Malinee Laopaiboon, Pisake Lumbiganon, Siwanon Rattanakanokchai, Warut Chaiwong, João Paulo Souza, Joshua P Vogel, Rintaro Mori, Ahmet Metin Gülmezoglu

Abstract read
In one paragraph

Article in BMC pediatrics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed.

  1. Article
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  8. Ethnic differences in postmaturity syndrome in newborns. Reflections on different durations of gestation.The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians · 2021
    Observational
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Malinee LaopaiboonDepartment of Epidemiology and Biostatistics, Faculty of Public Health, Khon Kaen University, 123 Mittraphap Road, Nai-Muang, Muang District, Khon Kaen, 40002, Thailand.
Pisake LumbiganonDepartment of Obstetrics and Gynaecology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand. pisake@kku.ac.th.ORCID 0000-0001-9372-0071
Siwanon RattanakanokchaiDepartment of Epidemiology and Biostatistics, Faculty of Public Health, Khon Kaen University, 123 Mittraphap Road, Nai-Muang, Muang District, Khon Kaen, 40002, Thailand.
Warut ChaiwongBangkok Health Research Center 2 Soi Soonvijai 7, New Petchburi Rd., Huaykwang, Bangkok, 10310, Thailand.
João Paulo SouzaDepartment of Social Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil.
Joshua P VogelUNDP • UNFPA • UNICEF • WHO • World Bank Special Programme of Research, Development and Research Training in Human Reproduction, Department of Reproductive Health and Research, World Health Organization, Geneva, Switzerland.
Rintaro MoriDepartment of Health Policy, National Center for Child Health and Development, Tokyo, Japan.
Ahmet Metin GülmezogluDepartment of Reproductive Health and Research World Health Organization, Avenue Appia 20, CH-1211, Geneva 27, Switzerland.

Funding

World Health Organization 001
6 · The paper itself

Abstract

background2500 g has been used worldwide as the definition of low birthweight (LBW) for almost a century. While previous studies have used statistical approaches to define LBW cutoffs, a LBW definition using an outcome-based approach has not been evaluated. We aimed to identify an outcome-based definition of LBW for live births in low- and middle-income countries (LMICs), using data from a WHO cross-sectional survey on maternal and perinatal health outcomes in 23 countries.

methodsWe performed a secondary analysis of all singleton live births in the WHO Global Survey (WHOGS) on Maternal and Perinatal Health, conducted in African and Latin American countries (2004-2005) and Asian countries (2007-2008). We used a two-level logistic regression model to assess the risk of early neonatal mortality (ENM) associated with subgroups of birthweight (< 1500 g, 1500-2499 g with 100 g intervals; 2500-3499 g as the reference group). The model adjusted for potential confounders, including maternal complications, gestational age at birth, mode of birth, fetal presentation and facility capacity index (FCI) score. We presented adjusted odds ratios (aORs) with 95% confidence intervals (CIs). A lower CI limit of at least two was used to define a clinically important definition of LBW.

resultsWe included 205,648 singleton live births at 344 facilities in 23 LMICs. An aOR of at least 2.0 for the ENM outcome was observed at birthweights below 2200 g (aOR 3.8 (95% CI; 2.7, 5.5) of 2100-2199 g) for the total population. For Africa, Asia and Latin America, the 95% CI lower limit aORs of at least 2.0 were observed when birthweight was lower than 2200 g (aOR 3.6 (95% CI; 2.0, 6.5) of 2100-2199 g), 2100 g (aOR 7.4 (95% CI; 5.1, 10.7) of 2000-2099 g) and 2200 g (aOR 6.1 (95% CI; 3.4, 10.9) of 2100-2199 g) respectively.

conclusionA birthweight of less than 2200 g may be an outcome-based threshold for LBW in LMICs. Regional-specific thresholds of low birthweight (< 2200 g in Africa, < 2100 g in Asia and < 2200 g in Latin America) may also be warranted.

Indexed as

Birth WeightInfant, Low Birth WeightAfricaAsiaClassificationConfounding Factors, EpidemiologicDeveloping CountriesHealth SurveysHumansInfantInfant MortalityInfant, NewbornLatin AmericaOdds RatioWorld Health OrganizationEarly neonatal mortalityLow birthweightOutcome-based definition

Identifiers

PMID31132994
PMCPMC6535858

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.