Evidence map›Paper›PMID 36629499›Full record

ArticleInternational journal of epidemiology2023

Association between exposure to combustion-related air pollution and multiple sclerosis risk.

Anna Karin Hedström, David Segersson, Jan Hillert, Pernilla Stridh, Ingrid Kockum, Tomas Olsson, Tom Bellander, Lars Alfredsson

Open access · hybridAbstract read
In one paragraph

Article in International journal of epidemiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 2 pooled it
2.5field-weighted citation impact, top 12% 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, 2 syntheses or guidelines pooled it, 16 citations in OpenAlex.

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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

8 authors at 2 institutions in 1 country.

Anna Karin HedströmDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.ORCID 0000-0002-6612-4749
David SegerssonAir Quality Research Unit, Swedish Meteorological and Hydrological Institute, Norrköping, Sweden.
Jan HillertDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
Pernilla StridhDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
Ingrid KockumDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
Tomas OlssonDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
Tom BellanderInstitute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.ORCID 0000-0001-7336-4161
Lars AlfredssonDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
Karolinska Institutet · SESwedish Meteorological and Hydrological Institute · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSmoking and occupational pulmonary irritants contribute to multiple sclerosis (MS) development. We aimed to study the association between ambient air pollution and MS risk and potential interaction with the human leukocyte antigen (HLA)-DRB1*15:01 allele.

methodsExposure to combustion-related air pollution was estimated as outdoor levels of nitrogen oxides (NOx) at the participants' residence locations, by spatially resolved dispersion modelling for the years 1990-18. Using two population-based case-control studies (6635 cases, 8880 controls), NOx levels were associated with MS risk by calculating odds ratios (OR) with 95% confidence intervals (CI) using logistic regression models. Interaction between high NOx levels and the HLA-DRB1*15:01 allele regarding MS risk was calculated by the attributable proportion due to interaction (AP). In addition, a register study was performed comprising all MS cases in Sweden who had received their diagnosis between 1993 and 2018 (n = 22 173), with 10 controls per case randomly selected from the National Population register.

resultsResidential air pollution was associated with MS risk. NOx levels (3-year average) exceeding the 90th percentile (24.6 µg/m3) were associated with an OR of 1.37 (95% CI 1.10-1.76) compared with levels below the 25th percentile (5.9 µg/m3), with a trend of increasing risk of MS with increasing levels of NOx (P <0.0001). A synergistic effect was observed between high NOx levels (exceeding the lower quartile among controls) and the HLA-DRB1*15:01 allele regarding MS risk (AP 0.26, 95% CI 0.13-0.29).

conclusionsOur findings indicate that moderate levels of combustion-related ambient air pollution may play a role in MS development.

Indexed as

Air PollutantsAir PollutionMultiple SclerosisEnvironmental ExposureHLA-DRB1 ChainsHumansLungParticulate MatterAir PollutantsHLA-DRB1 ChainsParticulate Matterair pollutionHLA-DRB1*15:01Multiple sclerosisnitrogen oxidessmoking

Identifiers

PMID36629499
PMCPMC10244060
OpenAlexW4315619018

What OpenQuestion holds

Textmetadata
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.