Evidence map›Paper›PMID 34872160›Full record

ArticlePaediatric and perinatal epidemiology2022

Air pollution and preterm birth: A time-stratified case-crossover study in the San Joaquin Valley of California.

Sandie Ha, Valerie Martinez, Alec M Chan-Golston

Abstract read
PubMed Publisher
In one paragraph

Article in Paediatric and perinatal epidemiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
1.3field-weighted citation impact, top 23% 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

8 citing papers in PubMed, 15 citations in OpenAlex.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Sandie HaDepartment of Public Health, School of Social Sciences, Humanities and Arts, University of California, Merced, California, USA.ORCID https://orcid.org/0000-0002-2975-8232
Valerie MartinezDepartment of Public Health, School of Social Sciences, Humanities and Arts, University of California, Merced, California, USA.
Alec M Chan-GolstonDepartment of Public Health, School of Social Sciences, Humanities and Arts, University of California, Merced, California, USA.
University of California, Merced · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAir pollution is linked to preterm birth (PTB), but existing studies are primarily focused on chronic exposures, conducted in areas with moderate pollution, and/or subject to confounding.

objectivesWe investigated short-term associations between two pollutants [particulate matter <2.5 microns (PM

methodsThis time-stratified case-crossover study includes 196,970 singleton pregnancies affected by PTB and early term birth from the San Joaquin Valley (SJV), California, USA (2007-2015). Daily ozone and PM

resultsDuring warm seasons (May-October), an IQR increase in ozone was associated with 9-11% increased odds of VPTB from lag 0 (OR

conclusionsPM

Indexed as

Air PollutantsAir PollutionPremature BirthCross-Over StudiesFemaleHumansInfant, NewbornMaternal ExposureParticulate MatterPregnancyAir PollutantsParticulate Matterair pollutioncase-crossover analysispregnancy outcomespreterm birth

Identifiers

PMID34872160
OpenAlexW4200083858

What OpenQuestion holds

Textmetadata
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.