Evidence map›Paper›PMID 27986703›Full record

ArticleAmerican journal of epidemiology2017

Cesarean Section and Risk of Childhood Acute Lymphoblastic Leukemia in a Population-Based, Record-Linkage Study in California.

Rong Wang, Joseph L Wiemels, Catherine Metayer, Libby Morimoto, Stephen S Francis, Nina Kadan-Lottick, Andrew T DeWan, Yawei Zhang, Xiaomei Ma

Abstract read
In one paragraph

Article in American journal of epidemiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 2 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

32 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Article
  6. Molecular Reactivity in Maternal Pregnancy Blood and Neonatal Dried Blood Spots Is Associated with the Risk of Pediatric Acute Lymphoblastic Leukemia.Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology · 2025
    Article
  7. Review
  8. The Influence of DNA Repair Genes and Prenatal Tobacco Exposure on Risk of Childhood Acute Lymphoblastic Leukemia: A Gene-Environment Interaction Study.Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology · 2025
    Article
  9. Article
  10. Childhood B cell leukemia: Intercepting the paths to progression.BioEssays : news and reviews in molecular, cellular and developmental biology · 2024
    Review
  11. Review
  12. Review
  13. Article
  14. Gene-Environment Analyses Reveal Novel Genetic Candidates with Prenatal Tobacco Exposure in Relation to Risk for Childhood Acute Lymphoblastic Leukemia.Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology · 2023
    Article
  15. Article
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  18. Review
  19. Article
  20. 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

9 authors.

Rong Wang
Joseph L Wiemels
Catherine Metayer
Libby Morimoto
Stephen S Francis
Nina Kadan-Lottick
Andrew T DeWan
Yawei Zhang
Xiaomei Ma

Funding

CALIFORNIA COORDINATED CANCER PREVENTION & CONTROL PROGRAMU58DP003862 · DP · CALIFORNIA STATE DEPT OF PUBLIC HEALTH · PI SNIPES, KURT P · 2012 to 2014
$31.5M
Training Program in Translational Brain Tumor ResearchT32CA151022 · NCI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI Joseph F Costello · 2010 to 2026
$6.6M
Genome-Wide Association Study of Childhood Leukemia by Hispanic StatusR01CA155461 · NCI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI MA, XIAOMEI, WIEMELS, JOSEPH LEO · 2011 to 2014
$4.1M
Project 3 - Prenatal Exposures, Constitutive Genetics, DNA Methylation & Childhood LeukemiaP50ES018172 · NIEHS · UNIVERSITY OF CALIFORNIA BERKELEY · PI METAYER, CATHERINE · 2015 to 2019
$3.8M
Project 3: Prenatal Exposure, DNA Methylation & Childhood LeukemiaP01ES018172 · NIEHS · UNIVERSITY OF CALIFORNIA BERKELEY · PI METAYER, CATHERINE · 2009 to 2013
$3.7M
Perinatal immune development and risk of childhood acute lymphoblastic leukemiaR01CA175737 · NCI · UNIVERSITY OF SOUTHERN CALIFORNIA · PI MA, XIAOMEI, WIEMELS, JOSEPH LEO · 2014 to 2018
$3.0M
NCCDPHP CDC HHS U58 DP003862NCI NIH HHS HHSN261201000034CNCI NIH HHS HHSN261201000035CNCI NIH HHS HHSN261201000035INCI NIH HHS HHSN261201000140CNCI NIH HHS R01 CA155461NCI NIH HHS R01 CA175737NCI NIH HHS T32 CA151022NIEHS NIH HHS P01 ES018172NIEHS NIH HHS P50 ES018172
6 · The paper itself

Abstract

The relationship of mode of delivery to risk of childhood acute lymphoblastic leukemia (ALL) is uncertain. After linking birth records and cancer registry data from California, we conducted a population-based case-control study to investigate the role of delivery by cesarean section (C-section) in the etiology of childhood ALL. This study included 5,081 cases and 18,927 matched controls born in 1978-2009; more detailed data were available on type of C-section (i.e., elective vs. emergency) for a subset of 1,552 cases and 5,688 controls. No association was observed between C-section overall and childhood ALL risk (<15 years of age), but elective C-section was associated with a significantly elevated risk of ALL (odds ratio (OR) = 1.17, 95% confidence interval (CI): 1.01, 1.36). At the peak ages of ALL incidence (2-4 years), C-section was associated with an 11% higher risk of ALL (OR = 1.11, 95% CI: 1.01, 1.22) compared with vaginal delivery, and the magnitude of the association was larger for elective C-section (OR = 1.38, 95% CI: 1.11, 1.70). Emergency C-section was not associated with childhood ALL. Because of design features minimizing nonparticipation and inaccurate recall, this record linkage-based study is less prone to bias. Our results suggest that delivery by elective C-section was associated with a higher risk of childhood ALL, especially at the peak ages of incidence. It is important to evaluate possible mechanisms, because this potential risk factor is modifiable.

Indexed as

AdolescentAdultAge of OnsetCase-Control StudiesCesarean SectionChildChild, PreschoolFemaleHumansInfantMaleOdds RatioPrecursor Cell Lymphoblastic Leukemia-LymphomaYoung Adultacute lymphoblastic leukemiacase-control studiescesarean sectionchildleukemiamicrobiome

Identifiers

PMID27986703
PMCPMC5253971

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.