Evidence map›Paper›PMID 25460673›Full record

ArticleEnvironmental research2015

Regional PM2.5 and asthma morbidity in an agricultural community: a panel study.

Christine Loftus, Michael Yost, Paul Sampson, Griselda Arias, Elizabeth Torres, Victoria Breckwich Vasquez, Parveen Bhatti, Catherine Karr

Abstract read
In one paragraph

Article in Environmental research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing 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

27 citing papers in PubMed.

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  12. Modeling and forecasting of monthly PMEnvironmental monitoring and assessment · 2021
    Article
  13. Airway hyperresponsiveness development and the toxicity of PM2.5.Environmental science and pollution research international · 2021
    Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Measuring the Urban Particulate Matter Island Effect with Rapid Urban Expansion.International journal of environmental research and public health · 2020
    Article
  19. Article
  20. Short-term effect of PMEnvironmental science and pollution research international · 2019
    Article
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

8 authors.

Christine LoftusDepartment of Epidemiology, School of Public Health, University of Washington, Box 357236, Seattle, WA 98195, United States. Electronic address: cloftus@uw.edu.
Michael YostDepartment of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Box 357234, Seattle, WA 98195, United States.
Paul SampsonDepartment of Statistics, College of Arts and Sciences, University of Washington, Box 354322, Seattle, WA 98195, United States.
Griselda AriasYakima Valley Farm Workers Clinic, Yakima, WA, United States.
Elizabeth TorresNorthwest Education Center, Radio KDNA, 121 Sunnyside Avenue, Granger, WA 98932, United States.
Victoria Breckwich VasquezPacific Northwest Agricultural Safety and Health Center, School of Public Health, University of Washington, Box 357234, Seattle, WA, United States.
Parveen BhattiDepartment of Epidemiology, School of Public Health, University of Washington, Box 357236, Seattle, WA 98195, United States.
Catherine KarrDepartment of Epidemiology, School of Public Health, University of Washington, Box 357236, Seattle, WA 98195, United States; Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Box 357234, Seattle, WA 98195, United States; Department of Pediatrics, School of Medicine, University of Washington, Box 356320, Seattle, WA 98195, United States.

Funding

University of Washington Reproductive, Perinatal and Pediatric Epidemiology T32HD052462 · NICHD · UNIVERSITY OF WASHINGTON · PI HOLT, VICTORIA L · 2006 to 2017
$2.7M
Aggravating Factors of Asthma in a Rural EnvironmentR21ES017906 · NIEHS · UNIVERSITY OF WASHINGTON · PI KARR, CATHERINE J · 2009 to 2012
$1.2M
NICHD NIH HHS HD052462-01NICHD NIH HHS T32 HD052462NIEHS NIH HHS 5R21ES17906-2NIEHS NIH HHS R21 ES017906
6 · The paper itself

Abstract

backgroundElevated pediatric asthma morbidity has been observed in rural US communities, but the role of the ambient environment in exacerbating rural asthma is poorly understood.

objectivesTo investigate associations between particulate matter less than 2.5 μm in diameter (PM2.5) and pediatric asthma exacerbations in an agricultural community of Washington State.

methodsSchool-aged children with asthma (n=58) were followed for up to 25 months with repeated measures of respiratory health. Asthma symptoms and quick-relief medication use were assessed biweekly through phone administered surveys (n=2023 interviews). In addition, subjects used home peak flow meters on a daily basis to measure forced expiratory volume in one second (FEV1) (n=7830 measurements). Regional PM2.5 was measured at a single air monitor located centrally in the study region. To assess relationships between PM2.5 and these outcomes we used linear regression with generalized estimating equations, adjusting for meteorological and temporal confounders. Effect modification by atopy was explored as well.

resultsAn interquartile increase (IQR) in weekly PM2.5 of 6.7 μg/m(3) was associated with an increase in reported asthma symptoms Specific symptoms including wheezing, limitation of activities, and nighttime waking displayed the strongest associations. FEV1 as a percent of predicted decreased by 0.9% (95%CI: -1.8, 0.0) for an IQR increase in PM2.5 one day prior, and by 1.4% (95%CI: -2.7, -0.2) when restricted to children with atopic asthma.

conclusionsThis study provides evidence that PM2.5 in an agricultural setting contributes to elevated asthma morbidity. Further work on identifying and mitigating sources of PM2.5 in the area is warranted.

Indexed as

AgricultureAsthmaCohort StudiesFemaleHumansLongitudinal StudiesMaleParticulate MatterRespiratory Function TestsWashingtonParticulate MatterAgricultural air qualityAsthma exacerbationsPediatric asthmaPM2.5Rural asthma

Identifiers

PMID25460673
PMCPMC4425279

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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.