Evidence map›Paper›PMID 18941591›Full record

ArticleEnvironmental health perspectives2008

Traffic-related air pollution and asthma onset in children: a prospective cohort study with individual exposure measurement.

Michael Jerrett, Ketan Shankardass, Kiros Berhane, W James Gauderman, Nino Künzli, Edward Avol, Frank Gilliland, Fred Lurmann, Jassy N Molitor, John T Molitor and 3 more

Abstract read
In one paragraph

Article in Environmental health perspectives, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 107 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
107citing papers in PubMed, 3 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

107 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
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  3. Pooled it
  4. Trial
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  6. Article
  7. Ambient Air Pollution and COVID-19 in California.Research report (Health Effects Institute) · 2026
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  18. Social Inequities in Exposure to Traffic-Related Air and Noise Pollution at Public Schools in Texas.International journal of environmental research and public health · 2023
    Article
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47 more citing papers are in PubMed but not listed here.

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

13 authors.

Michael JerrettSchool of Public Health, Division of Environmental Health Science, University of California, Berkeley, California 94720-7360, USA. jerrett@berkeley.edu
Ketan Shankardass
Kiros Berhane
W James Gauderman
Nino Künzli
Edward Avol
Frank Gilliland
Fred Lurmann
Jassy N Molitor
John T Molitor
Duncan C Thomas
John Peters
Rob McConnell

Funding

Translational Research Support CoreP30ES007048 · NIEHS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI ROB S MCCONNELL · 1996 to 2026
$46.4M
Urban Air Pollution and Children's Respiratory HealthP01ES011627 · NIEHS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI GILLILAND, FRANK D. · 2002 to 2011
$30.2M
Urban Air Pollution &Persistent Early Life AsthmaP01ES009581 · NIEHS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI GILLILAND, FRANK D. · 1999 to 2010
$6.8M
Socioeconomic Status, Stress, Air Pollution and AsthmaR03ES014046 · NIEHS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI MCCONNELL, ROB S · 2005 to 2006
$161k
NIEHS NIH HHS 1R03ES014046NIEHS NIH HHS 5P01ES009581NIEHS NIH HHS 5P01ES011627NIEHS NIH HHS 5P30ES007048NIEHS NIH HHS P01 ES009581NIEHS NIH HHS P01 ES011627NIEHS NIH HHS P30 ES007048NIEHS NIH HHS R03 ES014046
6 · The paper itself

Abstract

backgroundThe question of whether air pollution contributes to asthma onset remains unresolved.

objectivesIn this study, we assessed the association between asthma onset in children and traffic-related air pollution.

methodsWe selected a sample of 217 children from participants in the Southern California Children's Health Study, a prospective cohort designed to investigate associations between air pollution and respiratory health in children 10-18 years of age. Individual covariates and new asthma incidence (30 cases) were reported annually through questionnaires during 8 years of follow-up. Children had nitrogen dioxide monitors placed outside their home for 2 weeks in the summer and 2 weeks in the fall-winter season as a marker of traffic-related air pollution. We used multilevel Cox models to test the associations between asthma and air pollution.

resultsIn models controlling for confounders, incident asthma was positively associated with traffic pollution, with a hazard ratio (HR) of 1.29 [95% confidence interval (CI), 1.07-1.56] across the average within-community interquartile range of 6.2 ppb in annual residential NO2. Using the total interquartile range for all measurements of 28.9 ppb increased the HR to 3.25 (95% CI, 1.35-7.85).

conclusionsIn this cohort, markers of traffic-related air pollution were associated with the onset of asthma. The risks observed suggest that air pollution exposure contributes to new-onset asthma.

Indexed as

Air PollutionEnvironmental ExposureAdolescentAge of OnsetAsthmaChildCohort StudiesConfounding Factors, EpidemiologicFemaleHumansMaleModels, StatisticalSeasonsVehicle EmissionsVehicle Emissionsair pollutionasthma onsetchildrennitrogen dioxide

Identifiers

PMID18941591
PMCPMC2569108

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Registered trials

None linked

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.