Evidence map›Paper›PMID 28986549›Full record

ArticleScientific reports2017

Is Long-term Exposure to Air Pollution Associated with Episodic Memory? A Longitudinal Study from Northern Sweden.

Anna Oudin, Bertil Forsberg, Nina Lind, Steven Nordin, Daniel Oudin Åström, Anna Sundström, Maria Nordin

Abstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing 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

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

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  4. Air Pollution and Dementia: A Systematic Review.Journal of Alzheimer's disease : JAD · 2019
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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

7 authors.

Anna OudinOccupational and Environmental Medicine, Public Health and Clinical Medicine, Umeå University, 901 87, Umeå, Sweden. anna.oudin@umu.se.
Bertil ForsbergOccupational and Environmental Medicine, Public Health and Clinical Medicine, Umeå University, 901 87, Umeå, Sweden.
Nina LindDepartment of Psychology, Umeå University, 901 87, Umeå, Sweden.ORCID 0000-0003-4045-8748
Steven NordinDepartment of Psychology, Umeå University, 901 87, Umeå, Sweden.
Daniel Oudin ÅströmFamily medicine, cardiovascular epidemiology and lifestyle, Lund University, 205 02, Malmö, Sweden.
Anna SundströmDepartment of Psychology, Umeå University, 901 87, Umeå, Sweden.
Maria NordinDepartment of Psychology, Umeå University, 901 87, Umeå, Sweden.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Associations between long-term exposure to ambient air pollution and cognitive function have been observed in a few longitudinal studies. Our aim was to investigate the association between long-term exposure to air pollution and episodic memory, a marker of early cognitive decline. We used data from the Betula study in Northern Sweden, and included participants 60 to 85 of age at inclusion, 1,469 persons in total. The participants were followed for up to 22 years, five years apart between 1988 and 2010. A composite of five tasks was used as a measure of episodic memory measure (EMM), and the five-year change in EMM score (ΔEMM) was calculated such that a participant could contribute with up to four measurement pairs. A Land Use Regression Model was used to estimate cumulative annual mean of NOx at the residential address of the participants (a marker for long-term exposure to traffic-related air pollution). There did not seem to be any association between exposure to traffic air pollution and episodic memory change, with a ΔEMM estimate of per 1 µg/m3 increase in NOx of 0.01 (95% Confidence Interval: -0.02,0.03). This is in contrast to a growing body of evidence suggesting associations between air pollution and cognitive function.

Indexed as

Memory, EpisodicAgedAged, 80 and overAir PollutionFemaleHumansLongitudinal StudiesMaleMiddle AgedSweden

Identifiers

PMID28986549
PMCPMC5630578

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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.