Evidence map›Paper›PMID 27362783›Full record

ArticlePloS one2016

Air Pollution and Subtypes, Severity and Vulnerability to Ischemic Stroke-A Population Based Case-Crossover Study.

Ravi Maheswaran, Tim Pearson, Sean D Beevers, Michael J Campbell, Charles D Wolfe

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
3.3field-weighted citation impact, top 9% 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

12 citing papers in PubMed, 40 citations in OpenAlex.

  1. Article
  2. Article
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  4. Emerging Stroke Risk Factors: A Focus on Infectious and Environmental Determinants.Journal of cardiovascular development and disease · 2024
    Review
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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

5 authors at 3 institutions in 1 country.

Ravi MaheswaranPublic Health GIS Unit, School of Health and Related Research, University of Sheffield, Sheffield, United Kingdom.
Tim PearsonPublic Health GIS Unit, School of Health and Related Research, University of Sheffield, Sheffield, United Kingdom.
Sean D BeeversEnvironmental Research Group, King's College London, London, United Kingdom.
Michael J CampbellDesign, Trials and Statistics Section, School of Health and Related Research, University of Sheffield, Sheffield, United Kingdom.
Charles D WolfeDivision of Health and Social Care Research, King's College London and National Institute for Health Research (NIHR) Biomedical Research Centre, Guy's and St Thomas' NHS Foundation Trust and King's College London, London, United Kingdom.
University of Sheffield · GBGuy's and St Thomas' NHS Foundation Trust · GBKing's College London · GB

Funding

Department of Health RP-PG-0407-10184
6 · The paper itself

Abstract

background and purposeFew studies have examined the association between air pollutants and ischemic stroke subtypes. We examined acute effects of outdoor air pollutants (PM10, NO2, O3, CO, SO2) on subtypes and severity of incident ischemic stroke and investigated if pre-existing risk factors increased susceptibility.

methodsWe used a time stratified case-crossover study and stroke cases from the South London Stroke Register set up to capture all incident cases of first ever stroke occurring amongst residents in a geographically defined area. The Oxford clinical and TOAST etiological classifications were used to classify subtypes. A pragmatic clinical classification system was used to assess severity. Air pollution concentrations from the nearest background air pollution monitoring stations to patients' residential postcode centroids were used. Lags from 0 to 6 days were investigated.

resultsThere were 2590 incident cases of ischemic stroke (1995-2006). While there were associations at various lag times with several pollutants, overall, there was no consistent pattern between exposure and risk of ischemic stroke subtypes or severity. The possible exception was the association between NO2 exposure and small vessel disease stroke-adjusted odds ratio of 1.51 (1.12-2.02) associated with an inter-quartile range increase in the lag 0-6 day average for NO2. There were no clear associations in relation to pre-existing risk factors.

conclusionsOverall, we found little consistent evidence of association between air pollutants and ischemic stroke subtypes and severity. There was however a suggestion that increasing NO2 exposure might be associated with higher risk of stroke caused by cerebrovascular small vessel disease.

Indexed as

AgedAged, 80 and overAir PollutantsAir PollutionBrain IschemiaEnvironmental ExposureEnvironmental MonitoringFemaleHumansIncidenceLondonMaleMiddle AgedRisk FactorsSeverity of Illness IndexStrokeAir Pollutants

Identifiers

PMID27362783
PMCPMC4928841
OpenAlexW2462758232

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.