Evidence map›Paper›PMID 24710134›Full record

ArticleBMJ open2014

Long-term exposure to traffic-related air pollution and progression of carotid artery atherosclerosis: a prospective cohort study.

Wen Qi Gan, Ryan W Allen, Michael Brauer, Hugh W Davies, G B John Mancini, Scott A Lear

Abstract read
In one paragraph

Article in BMJ open, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 4 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

30 citing papers in PubMed, 4 syntheses or guidelines pooled it.

  1. Characteristics of cohort studies of long-term exposure to PMEnvironmental science and pollution research international · 2019
    Pooled it
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  12. Effects of ambient particulate matter on vascular tissue: a review.Journal of toxicology and environmental health. Part B, Critical reviews · 2020
    Review
  13. Article
  14. Article
  15. Article
  16. Residential Exposure to PMJournal of women's health (2002) · 2019
    Article
  17. Article
  18. Five-year exposure to PMInternational journal of hygiene and environmental health · 2019
    Article
  19. Article
  20. 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

6 authors.

Wen Qi GanDepartment of Population Health, Hofstra North Shore-LIJ School of Medicine, Great Neck, New York, USA.
Ryan W Allen
Michael Brauer
Hugh W Davies
G B John Mancini
Scott A Lear

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesEpidemiological studies have demonstrated associations between long-term exposure to traffic-related air pollution and coronary heart disease (CHD). Atherosclerosis is the principal pathological process responsible for CHD events, but effects of traffic-related air pollution on progression of atherosclerosis are not clear. This study aimed to investigate associations between long-term exposure to traffic-related air pollution and progression of carotid artery atherosclerosis.

settingHealthy volunteers in metropolitan Vancouver, Canada. PARTICIPANTS AND OUTCOME MEASURES: 509 participants aged 30-65 years were recruited and followed for approximately 5 years. At baseline and end of follow-up, participants underwent carotid artery ultrasound examinations to assess atherosclerosis severity, including carotid intima-media thickness, plaque area, plaque number and total area. Annual change of each atherosclerosis marker during the follow-up period was calculated as the difference between these two measurements divided by years of follow-up. Living close to major roads was defined as ≤150 m from a highway or ≤50 m from a major road. Residential exposures to traffic-related air pollutants including black carbon, fine particles, nitrogen dioxide and nitric oxide were estimated using high-resolution land-use regression models. The data were analysed using general linear models adjusting for various covariates.

resultsAt baseline, there were no significant differences in any atherosclerosis markers between participants living close to and those living away from major roads. After follow-up, the differences in annual changes of these markers between these two groups were small and not statistically significant. Also, no significant associations were observed with concentrations of traffic-related air pollutants including black carbon, fine particles, nitrogen dioxide and nitric oxide.

conclusionsThis study did not find significant associations between traffic-related air pollution and progression of carotid artery atherosclerosis in a region with lower levels and smaller contrasts of ambient air pollution.

Indexed as

Motor VehiclesAdultAgedAir PollutionArteriosclerosisCanadaCarotid Artery DiseasesCross-Sectional StudiesDisease ProgressionFemaleHumansLongitudinal StudiesMaleMiddle AgedProspective StudiesRisk FactorsEpidemiologyOccupational & Industrial MedicinePreventive MedicinePublic Health

Identifiers

PMID24710134
PMCPMC3987708

What OpenQuestion holds

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LicenceCC BY-NC
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.