Evidence map›Paper›PMID 19745206›Full record

ArticleAmerican journal of respiratory and critical care medicine2009

Exposure to traffic-related particles and endotoxin during infancy is associated with wheezing at age 3 years.

Patrick H Ryan, David I Bernstein, James Lockey, Tiina Reponen, Linda Levin, Sergey Grinshpun, Manuel Villareal, Gurjit K Khurana Hershey, Jeff Burkle, Grace LeMasters

Open access · greenAbstract read
In one paragraph

Article in American journal of respiratory and critical care medicine, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
57citing papers in PubMed, 2 pooled it
6.8field-weighted citation impact, top 3% of its field
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

57 citing papers in PubMed, 2 syntheses or guidelines pooled it, 116 citations in OpenAlex.

  1. Environmental Concerns for Children with Asthma on the Navajo Nation.Annals of the American Thoracic Society · 2018
    Pooled it
  2. Pooled it
  3. Trial
  4. Risk Factors and Mechanisms Leading to Preschool Recurrent Wheeze and Asthma.The journal of allergy and clinical immunology. In practice · 2025
    Review
  5. Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Synergistic Association of House Endotoxin Exposure and Ambient Air Pollution with Asthma Outcomes.American journal of respiratory and critical care medicine · 2019
    Article
  15. Review
  16. Combining sensor-based measurement and modeling of PMAerosol science and technology : the journal of the American Association for Aerosol Research · 2019
    Article
  17. Article
  18. Article
  19. Concentration-dependent effects of PMEuropean archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2017
    Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 3 institutions in 2 countries.

Patrick H RyanDepartment of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA. patrick.ryan@uc.edu
David I Bernstein
James Lockey
Tiina Reponen
Linda Levin
Sergey Grinshpun
Manuel Villareal
Gurjit K Khurana Hershey
Jeff Burkle
Grace LeMasters
Environmental Health · GBCincinnati Children's Hospital Medical Center · USUniversity of Cincinnati Medical Center · US

Funding

PHS HHS R01 11170
6 · The paper itself

Abstract

rationaleMurine models demonstrate a synergistic production of reactive oxygen species on coexposure to diesel exhaust particles and endotoxin.

objectivesIt was hypothesized that coexposure to traffic-related particles and endotoxin would have an additive effect on persistent wheezing during early childhood.

methodsPersistent wheezing at age 36 months was assessed in the Cincinnati Childhood Allergy and Air Pollution Study, a high-risk birth cohort. A time-weighted average exposure to traffic-related particles was determined by applying a land-use regression model to the homes, day cares, and other locations where children spent time from birth through age 36 months. Indoor levels of endotoxin were measured from dust samples collected before age 12 months. The relationship between dichotomized (<or>or=75th percentile) traffic-related particle and endotoxin exposure and persistent wheezing, controlling for potential covariates, was examined. MEASUREMENTS AND MAIN

resultsPersistent wheezing at age 36 months was significantly associated with exposure to increased levels of traffic-related particles before age 12 months (OR = 1.75; 95% confidence interval, 1.07-2.87). Coexposure to endotoxin had a synergistic effect with traffic exposure on persistent wheeze (OR = 5.85; 95% confidence interval, 1.89-18.13) after adjustment for significant covariates.

conclusionsThe association between traffic-related particle exposure and persistent wheezing at age 36 months is modified by exposure to endotoxin. This finding supports prior toxicological studies demonstrating a synergistic production of reactive oxygen species after coexposure to diesel exhaust particles and endotoxin. The effect of early versus later exposure to traffic-related particles, however, remains to be studied because of the high correlation between exposure throughout the first 3 years of life.

Indexed as

Vehicle EmissionsAir PollutantsAir PollutionChild, PreschoolCohort StudiesEndotoxinsEnvironmental ExposureFollow-Up StudiesHumansInfantOdds RatioOhioProspective StudiesRespiratory SoundsRisk FactorsSurveys and QuestionnairesAir PollutantsEndotoxinsVehicle Emissions

Identifiers

PMID19745206
PMCPMC2784413
OpenAlexW2155708105

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.