Evidence map›Paper›PMID 27286442›Full record

ArticleEnvironmental health perspectives2017

Placental Pathology Associated with Household Air Pollution in a Cohort of Pregnant Women from Dar es Salaam, Tanzania.

Blair J Wylie, Emmanuel Matechi, Yahya Kishashu, Wafaie Fawzi, Zul Premji, Brent A Coull, Russ Hauser, Majid Ezzati, Drucilla J Roberts

Abstract read
In one paragraph

Article in Environmental health perspectives, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 1 pooled it
–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

38 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  8. Maternal PMReproductive toxicology (Elmsford, N.Y.) · 2026
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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

9 authors.

Blair J WylieDepartment of Obstetrics/Gynecology, Massachusetts General Hospital, Boston, Massachusetts, USA.
Emmanuel Matechi
Yahya Kishashu
Wafaie Fawzi
Zul Premji
Brent A Coull
Russ Hauser
Majid Ezzati
Drucilla J Roberts

Funding

HARVARD CLINICAL AND TRANSLATIONAL SCIENCE CENTER (UL1)UL1RR025758 · NCRR · HARVARD MEDICAL SCHOOL · PI NADLER, LEE MARSHALL · 2008 to 2011
$91.4M
Translational Research Support CoreP30ES000002 · NIEHS · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI Marc G Weisskopf · 1985 to 2026
$44.6M
Malaria in Pregnancy: Nutrition and Immunologic EffectsR01HD057941 · NICHD · HARVARD SCHOOL OF PUBLIC HEALTH · PI FAWZI, WAFAIE W · 2009 to 2013
$2.6M
Prenatal Iron Supplements: Safety & Efficacy in TanzaniaU01HD061232 · NICHD · HARVARD SCHOOL OF PUBLIC HEALTH · PI FAWZI, WAFAIE W · 2009 to 2014
$1.6M
Household air pollution in Tanzania, placental health and pregnancy outcomeK23ES021471 · NIEHS · MASSACHUSETTS GENERAL HOSPITAL · PI WYLIE, BLAIR JOHNSON · 2012 to 2016
$1.3M
NCRR NIH HHS UL1 RR025758NICHD NIH HHS R01 HD057941NICHD NIH HHS U01 HD061232NIEHS NIH HHS K23 ES021471NIEHS NIH HHS P30 ES000002
6 · The paper itself

Abstract

backgroundSmoke from the burning of biomass fuels has been linked with adverse pregnancy outcomes such as low birth weight, stillbirth, and prematurity.

objectiveTo identify potential underlying mechanisms of adverse perinatal outcomes, we explored the association of placental pathology with household air pollution in pregnant women from urban/periurban Tanzania who cook predominantly with charcoal.

methodsBetween 2011 and 2013, we measured personal exposures to fine particulate matter (PM2.5) and carbon monoxide (CO) over 72 hr among a cohort of Tanzanian pregnant women. Placentas were collected after delivery for examination. Placental pathologies of inflammatory, hypoxic, ischemic/hypertensive, infectious and thrombotic etiologies were diagnosed, blinded to exposure levels. Using multiple logistic regression, we explored the association of PM2.5 and CO exposure with placental pathology.

resultsOne hundred sixteen women had personal air exposure measurements and placental histopathology available for analysis. PM2.5 and CO exposures were moderate [geometric means (GSD) were 40.5 μg/m3 (17.3) and 2.21 ppm (1.47) respectively]; 88.6% of PM2.5 measurements exceeded World Health Organization air quality guidelines. We observed an increase in the odds (per 1-unit increase in exposure on the ln-scale) of fetal thrombotic vasculopathy (FTV) both with increasing PM2.5 [adjusted odds ratio (aOR) = 5.5; 95% CI: 1.1, 26.8] and CO measurements (aOR = 2.5; 95% CI: 1.0, 6.4) in adjusted models only. FTV also was more common among pregnancies complicated by stillbirth or low birth weight.

conclusionsFetal thrombosis may contribute to the adverse outcomes associated with household air pollution from cook stoves during pregnancy. Larger studies are necessary for confirmation. Citation: Wylie BJ, Matechi E, Kishashu Y, Fawzi W, Premji Z, Coull BA, Hauser R, Ezzati M, Roberts D. 2017. Placental pathology associated with household air pollution in a cohort of pregnant women from Dar es Salaam, Tanzania. Environ Health Perspect 125:134-140; http://dx.doi.org/10.1289/EHP256.

Indexed as

AdultAir PollutantsAir PollutionAir Pollution, IndoorCarbon MonoxideCookingFamily CharacteristicsFemaleHumansMaternal ExposureParticulate MatterPlacentaPregnancySmokeTanzaniaAir PollutantsCarbon MonoxideParticulate MatterSmoke

Identifiers

PMID27286442
PMCPMC5226703

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.