Evidence map›Paper›PMID 26916696›Full record

ArticleBMJ open2016

Association between traffic-related air pollution and asthma in preschool children in a national Japanese nested case-control study.

Hideki Hasunuma, Tosiya Sato, Tsutomu Iwata, Yoichi Kohno, Hiroshi Nitta, Hiroshi Odajima, Toshimasa Ohara, Takashi Omori, Masaji Ono, Shin Yamazaki and 1 more

Open access · goldAbstract read
In one paragraph

Article in BMJ open, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 3 pooled it
2.6field-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

15 citing papers in PubMed, 3 syntheses or guidelines pooled it, 29 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Review
  5. Review
  6. Global Considerations in Asthma Treatment: Management in Low Resource Settings.Advances in experimental medicine and biology · 2023
    Article
  7. Article
  8. Article
  9. S3 guideline Allergy Prevention.Allergologie select · 2022
    Article
  10. Outdoor air pollution and the onset and exacerbation of asthma.Chronic diseases and translational medicine · 2021
    Review
  11. Article
  12. Article
  13. Coal burning-derived SOEnvironmental health and preventive medicine · 2019
    Article
  14. Article
  15. Review
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

11 authors at 7 institutions in 1 country.

Hideki HasunumaDepartment of Public Health, Hyogo College of Medicine, Nishinomiya, Japan Center for Environmental Information Science, Tokyo, Japan.
Tosiya SatoDepartment of Biostatistics, Kyoto University School of Public Health, Kyoto, Japan.
Tsutomu IwataDepartment of Education for Childcare, Tokyo Kasei University, Tokyo, Japan.
Yoichi KohnoDepartment of Pediatrics, Graduate School of Medicine, Chiba University, Chiba, Japan.
Hiroshi NittaNational Institute for Environmental Studies, Tsukuba, Japan.
Hiroshi OdajimaNational Hospital Organization Fukuoka Hospital, Fukuoka, Japan.
Toshimasa OharaNational Institute for Environmental Studies, Tsukuba, Japan.
Takashi OmoriCenter Administration Division, Center for Clinical Research, Kobe University Hospital, Kobe, Japan.
Masaji OnoNational Institute for Environmental Studies, Tsukuba, Japan.
Shin YamazakiNational Institute for Environmental Studies, Tsukuba, Japan.
Masayuki ShimaDepartment of Public Health, Hyogo College of Medicine, Nishinomiya, Japan.
National Institute for Environmental Studies · JPHyogo Medical University · JPChiba University · JPKobe University Hospital · JPKyoto University · JPNational Hospital Organization · JPTokyo Kasei University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThere has been little study on the effect of traffic-related air pollution on the incidence and persistence of asthma in preschool children. We evaluated the association of exposure to traffic-related air pollution with the incidence/persistence of asthma during the first 3 years of life using a population-based study.

methodsA baseline survey was conducted in 1½-year-old children (n=63,266). A follow-up survey at 3 years of age (n=43,343) identified new-onset asthma cases (n=853) and persistence of asthma (n=214). In the prevalence/persistence study, the outdoor concentrations of nitrogen oxides (NOx) and elemental carbon (EC) at home during the first 1½ years of life were estimated by a dispersion model. In the nested case-control study, which regarded incidence of asthma as cases, the personal exposure levels were estimated by dispersion model including time-activity pattern.

resultsThere was no statistically significant association between the incidence of asthma between age 1½ and 3 years and personal exposure levels to NOx nor EC. However, the persistence of asthmatic symptoms (between 1½ and 3  ears) was significantly associated with outdoor concentrations of NOx. ORs for the persistence of asthmatic symptoms were 6.02 (95% CI 1.51 to 23.92) for the comparison between the upper 5th and lower 25th centiles of NOx.

conclusionsWhile no statistically significant association was observed for the incidence of asthma, the persistence of asthmatic symptoms in preschool children was significantly associated with traffic-related air pollution. This supports its importance as a risk factor in childhood airway disease.

Indexed as

Vehicle EmissionsAir PollutantsAir PollutionAsthmaCase-Control StudiesChild, PreschoolEnvironmental MonitoringFemaleHumansIncidenceJapanMaleRisk FactorsAir PollutantsVehicle EmissionsAir pollutionAutomobile exhaustEPIDEMIOLOGYPreschool children

Identifiers

PMID26916696
PMCPMC4769392
OpenAlexW2341313698

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.