Evidence map›Paper›PMID 31138675›Full record

ArticleOccupational and environmental medicine2019

Parental occupational exposure to benzene and the risk of childhood and adolescent acute lymphoblastic leukaemia: a population-based study.

Julia E Heck, Di He, Zuelma Arellano Contreras, Beate Ritz, Jørn Olsen, Johnni Hansen

Open access · greenAbstract read
In one paragraph

Article in Occupational and environmental medicine, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
2.9field-weighted citation impact, top 10% 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, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Childhood cancer risk in offspring of mothers occupationally exposed to hydrocarbon solvents.European journal of cancer prevention : the official journal of the European Cancer Prevention Organisation (ECP) · 2026
    Article
  4. Review
  5. Exposures from Oil and Gas Development and Childhood Leukemia Risk in Colorado: A Population-Based Case-Control Study.Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology · 2025
    Article
  6. Review
  7. Exploring Urban Green Spaces' Effect against Traffic Exposure on Childhood Leukaemia Incidence.International journal of environmental research and public health · 2023
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. A Cross-Sectional Study on Benzene Exposure in Pediatric Age and Parental Smoking Habits at Home.International journal of environmental research and public health · 2020
    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

6 authors at 2 institutions in 3 countries.

Julia E HeckDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, California, USA.ORCID 0000-0001-8713-8413
Di HeDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, California, USA.
Zuelma Arellano ContrerasDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, California, USA.
Beate RitzDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, California, USA.
Jørn OlsenDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, California, USA.
Johnni HansenInstitute of Cancer Epidemiology, Danish Cancer Society, Copenhagen, Denmark.
University of California, Los Angeles · USInstitute of Cancer Research · CA

Funding

Maternal comorbidities, prescription drug use in pregnancy and childhood cancerR21CA175959 · NCI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI HECK, JULIA · 2014 to 2015
$323k
Parental Occupation and Childhood CancersR03ES021643 · NIEHS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI HECK, JULIA · 2012 to 2013
$152k
NCI NIH HHS R21 CA175959NIEHS NIH HHS R03 ES021643
6 · The paper itself

Abstract

objectivesOnly a small number of studies have reported on the association of parental occupational exposure to benzene and risk of childhood and adolescent leukaemias. We examined associations with acute lymphoblastic leukaemia (ALL) in this population-based study in Denmark.

methodsBenzene was largely banned from Danish workplaces after 1975, thus this case-control study focused on the immediately prior years. Paediatric cancer cases (<age 20) were ascertained from the Danish Cancer Registry among children born 1968-1974, and controls were selected from population records. Paternal occupation within the 3 months preconception and maternal pregnancy occupation were identified from nationwide pension fund records. Blinded, we assigned benzene exposure using a job-exposure matrix that had been developed for the Danish population. Risk for ALL was estimated using conditional logistic regression. In an exploratory analysis, we also examined other cancers with at least five case parents exposed.

resultsWe identified 217 employed case fathers and 169 employed case mothers, of which 22 (10.1%) and 11 (6.5%), respectively, were exposed to benzene (vs 6.7% and 2.9% of control fathers and mothers). Most exposed parents worked as machine or engine mechanics, or in the shoe industry. Maternal occupational exposure to benzene in pregnancy was related to increased risk of ALL in offspring (adjusted OR=2.28, 95% CI 1.17 to 4.41), while paternal preconceptional benzene exposure was not as strongly associated (adjusted OR=1.40, 95% CI 0.88 to 2.22).

conclusionsOur study supports an increased risk for ALL with parental occupational benzene exposure.

Indexed as

AdolescentAdultBenzeneCase-Control StudiesChildChild, PreschoolDenmarkFemaleHumansInfantLeukemiaMaleMaternal ExposureOccupational ExposurePaternal ExposurePrecursor Cell Lymphoblastic Leukemia-LymphomaBenzeneacute lymphoblastic leukaemiaacute undifferentiated leukemiaastrocytomagerm cell tumourparental occupational exposure

Identifiers

PMID31138675
PMCPMC6693321
OpenAlexW2947428482

What OpenQuestion holds

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LicenceTDM
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.