Evidence map›Paper›PMID 17637932›Full record

ArticleEnvironmental health perspectives2007

Ambient air pollution and low birth weight in Connecticut and Massachusetts.

Michelle L Bell, Keita Ebisu, Kathleen Belanger

Abstract read
In one paragraph

Article in Environmental health perspectives, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 171 papers, 8 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
171citing papers in PubMed, 8 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

171 citing papers in PubMed, 8 syntheses or guidelines pooled it.

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  7. Maternal exposure to fine particulate matter (PM2.5) and pregnancy outcomes: a meta-analysis.Environmental science and pollution research international · 2015
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111 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors.

Michelle L BellSchool of Forestry and Environmental Studies, Yale University, New Haven, Connecticut 06511, USA. michelle.bell@yale.edu
Keita Ebisu
Kathleen Belanger

Funding

Genetic &Environmental Risk Factors in Asthma SeverityR01ES011013 · NIEHS · YALE UNIVERSITY · PI LEADERER, BRIAN P · 2001 to 2010
$4.9M
GENE-ENVIRONMENT INTERACTIONS IN ASTHMA DEVELOPMENTR01ES007456 · NIEHS · YALE UNIVERSITY · PI LEADERER, BRIAN P · 1995 to 2005
$3.2M
National Assessment of the Mortality and Morbidity Effects of Tropospheric OzoneR01ES015028 · NIEHS · YALE UNIVERSITY · PI BELL, MICHELLE L · 2006 to 2010
$477k
NIEHS NIH HHS ES015028NIEHS NIH HHS ES07456-07NIEHS NIH HHS ES11013NIEHS NIH HHS R01 ES007456NIEHS NIH HHS R01 ES011013NIEHS NIH HHS R01 ES015028
6 · The paper itself

Abstract

backgroundSeveral studies have examined whether air pollution affects birth weight; however results vary and many studies were focused on Southern California or were conducted outside of the United States.

objectivesWe investigated maternal exposure to particulate matter with aerodynamic diameter < 10, < 2.5 microm (PM(10), PM(2.5)), sulfur dioxide, nitrogen dioxide, and carbon monoxide and birth weight for 358,504 births in Massachusetts and Connecticut from 1999 to 2002.

methodsAnalysis included logistic models for low birth weight (< 2,500 g) and linear models with birth weight as a continuous variable. Exposure was assigned as the average county-level concentration over gestation and each trimester based on mother's residence. We adjusted for gestational length, prenatal care, type of delivery, child's sex, birth order, weather, year, and mother's race, education, marital status, age, and tobacco use.

resultsAn interquartile increase in gestational exposure to NO(2), CO, PM(10), and PM(2.5) lowered birth weight by 8.9 g [95% confidence interval (CI), 7.0-10.8], 16.2 g (95% CI, 12.6-19.7), 8.2 g (95% CI, 5.3-11.1), and 14.7 g (95% CI, 12.3-17.1), respectively. Lower birth weight was associated with exposure in the third trimester for PM(10), the first and third trimesters for CO, the first trimester for NO(2) and SO(2), and the second and third trimesters for PM(2.5). Effect estimates for PM(2.5) were higher for infants of black mothers than those of white mothers.

conclusionsResults indicate that exposure to air pollution, even at low levels, may increase risk of low birth weight, particularly for some segments of the population.

Indexed as

Air PollutionInfant, Low Birth WeightCarbon MonoxideConnecticutFemaleHumansInfant, NewbornMassachusettsMaternal ExposureNitrogen DioxideParticle SizePregnancySulfur DioxideCarbon MonoxideNitrogen DioxideSulfur Dioxide

Identifiers

PMID17637932
PMCPMC1913584

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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.