Evidence map›Paper›PMID 32680912›Full record

Trial reportGlobal health, science and practice2020

Impact of Improved Biomass and Liquid Petroleum Gas Stoves on Birth Outcomes in Rural Nepal: Results of 2 Randomized Trials.

Joanne Katz, James M Tielsch, Subarna K Khatry, Laxman Shrestha, Patrick Breysse, Scott L Zeger, Naoko Kozuki, William Checkley, Steven C LeClerq, Luke C Mullany

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in Global health, science and practice, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing 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

21 citing papers in PubMed.

  1. Trial
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  15. How Do Household Energy Transitions Work?Research report (Health Effects Institute) · 2025
    Article
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  18. 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

10 authors.

Joanne KatzDepartment of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. jkatz1@jhu.edu.
James M TielschDepartment of Global Health, Milken Institute School of Public Health, George Washington University, Washington, DC, USA.
Subarna K KhatryNepal Nutrition Intervention Project, Sarlahi, Kathmandu, Nepal.
Laxman ShresthaInstitute of Medicine, Tribhuvan University, Kathmandu, Nepal.
Patrick BreysseDepartment of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
Scott L ZegerDepartment of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
Naoko KozukiDepartment of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
William CheckleyDepartment of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA.
Steven C LeClerqDepartment of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
Luke C MullanyDepartment of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.

Funding

Cookstove Replacement for Prevention of ARI and Low Birthweight in NepalR01ES015558 · NIEHS · JOHNS HOPKINS UNIVERSITY · PI TIELSCH, JAMES M · 2008 to 2012
$4.6M
Prioritization of modifiable risk factors for adverse pregnancy outcomes and neonatal mortality in rural NepalR01HD092411 · NICHD · JOHNS HOPKINS UNIVERSITY · PI KATZ, JOANNE · 2018 to 2020
$822k
NICHD NIH HHS R01 HD092411NIEHS NIH HHS R01 ES015558
6 · The paper itself

Abstract

backgroundFew randomized trials have assessed the impact of reducing household air pollution from biomass stoves on adverse birth outcomes in low-income countries.

methodsTwo sequential trials were conducted in rural low-lying Nepal. Trial 1 was a cluster-randomized step-wedge trial comparing traditional biomass stoves and improved biomass stoves vented with a chimney. Trial 2 was a parallel household-randomized trial comparing vented biomass stoves and liquid petroleum gas (LPG) stoves with a year's supply of gas. Kitchen particulate matter of 2.5 μm or less (PM

resultsIn trial 1, the mean 20-hour kitchen PM

conclusionsImproved biomass or LPG stoves did not reduce adverse birth outcomes. PM

Indexed as

Air Pollution, IndoorBirth WeightCarbon MonoxideCookingFemaleGestational AgeHumansNepalParticulate MatterPregnancyPregnancy OutcomeRural PopulationCarbon MonoxideParticulate Matter

Identifiers

PMID32680912
PMCPMC7541104

What OpenQuestion holds

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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.