Evidence map›Paper›PMID 27788159›Full record

ArticlePloS one2016

Effect of Environmental Factors on Low Weight in Non-Premature Births: A Time Series Analysis.

Julio Díaz, Virginia Arroyo, Cristina Ortiz, Rocío Carmona, Cristina Linares

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 19 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 4 pooled it
4.4field-weighted citation impact, top 6% 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

19 citing papers in PubMed, 4 syntheses or guidelines pooled it, 51 citations in OpenAlex.

  1. Adverse Birth Outcomes Related to NOInternational journal of environmental research and public health · 2020
    Pooled it
  2. Pooled it
  3. Pooled it
  4. Heat Exposure and Maternal Health in the Face of Climate Change.International journal of environmental research and public health · 2017
    Pooled it
  5. Review
  6. Review
  7. Article
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  11. Extreme Heat and Pregnancy Outcomes: A Scoping Review of the Epidemiological Evidence.International journal of environmental research and public health · 2022
    Article
  12. The effect of prenatal temperature and PMEnvironment international · 2021
    Article
  13. Article
  14. Article
  15. Article
  16. Article
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  18. Article
  19. Industrial air pollution and low birth weight: a case-control study in Texas, USA.Environmental science and pollution research international · 2018
    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

5 authors at 3 institutions in 1 country.

Julio DíazNational School of Public Health, Carlos III Institute of Health, Madrid, Spain.
Virginia ArroyoComplejo Asistencial Universitario de Salamanca (CAUSA), Salamanca, Spain.
Cristina OrtizNational School of Public Health, Carlos III Institute of Health, Madrid, Spain.
Rocío CarmonaNational School of Public Health, Carlos III Institute of Health, Madrid, Spain.
Cristina LinaresNational School of Public Health, Carlos III Institute of Health, Madrid, Spain.
Escuela Nacional de Sanidad · ESInstituto de Salud Carlos III · ESComplejo Hospitalario de Salamanca · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveExposure to pollutants during pregnancy has been related to adverse birth outcomes. LBW can give rise to lifelong impairments. Prematurity is the leading cause of LBW, yet few studies have attempted to analyse how environmental factors can influence LBW in infants who are not premature. This study therefore sought to analyse the influence of air pollution, noise levels and temperature on LBW in non-premature births in Madrid during the period 2001-2009.

methodsEcological time-series study to assess the impact of PM2.5, NO2 and O3 concentrations, noise levels, and temperatures on LBW among non-premature infants across the period 2001-2009. Our analysis extended to infants having birth weights of 1,500 g to 2,500 g (VLBW) and less than 1,500 g (ELBW). Environmental variables were lagged until 37 weeks with respect to the date of birth, and cross-correlation functions were used to identify explaining lags. Results were quantified using Poisson regression models.

resultsAcross the study period 298,705 births were registered in Madrid, 3,290 of which had LBW; of this latter total, 1,492 were non-premature. PM2.5 was the only pollutant to show an association with the three variables of LBW in non-premature births. This association occurred at around the third month of gestation for LBW and VLBW (LBW: lag 23 and VLBW: lag 25), and at around the eighth month of gestation for ELBW (lag 6). Leqd was linked to LBW at lag zero. The RR of PM2.5 on LBW was 1.01 (1.00 1.03). The RR of Leqd on LBW was 1.09 (0.99 1.19)(p<0.1).

conclusionsThe results obtained indicate that PM2.5 had influence on LBW. The adoption of measures aimed at reducing the number of vehicles would serve to lower pregnant women's exposure. In the case of noise should be limited the exposure to high levels during the final weeks of pregnancy.

Indexed as

Infant, Low Birth WeightAir PollutionCitiesEnvironmental ExposureFemaleHumansInfant, Extremely Low Birth WeightInfant, Very Low Birth WeightNitrogen DioxideNoiseOzoneParticulate MatterPregnancyPremature BirthRiskSpainNitrogen DioxideOzoneParticulate Matter

Identifiers

PMID27788159
PMCPMC5082809
OpenAlexW2545744426

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.