Evidence map›Paper›PMID 34161650›Full record

SynthesisJournal of occupational health2021

Sedentary work and breast cancer risk: A systematic review and meta-analysis.

Jongin Lee, JaeYong Lee, Dong-Wook Lee, Hyoung-Ryoul Kim, Mo-Yeol Kang

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Journal of occupational health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 5 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

20 citing papers in PubMed, 5 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Pooled it
  6. Trial
  7. Article
  8. Occupation and Female Breast Cancer Mortality in South Africa: A Case-Control Study.International journal of environmental research and public health · 2025
    Article
  9. Sedentary Time and Breast Cancer Risk in the Sister Study Cohort.Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology · 2025
    Article
  10. Association of lifestyle factors with breast cancer incidence: An overview of systematic reviews.Chinese journal of cancer research = Chung-kuo yen cheng yen chiu · 2025
    Article
  11. Article
  12. Article
  13. Article
  14. Physical Activity, Sedentary Time, and Psychosocial Functioning among Adults with Cancer: A Scoping Review.International journal of environmental research and public health · 2024
    Article
  15. Article
  16. Article
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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.

Jongin LeeDepartment of Occupational and Environmental Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.ORCID http://orcid.org/0000-0003-4337-8444
JaeYong LeeDepartment of Occupational and Environmental Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.ORCID https://orcid.org/0000-0002-1062-658X
Dong-Wook LeeDepartment of Preventive Medicine, College of Medicine, Seoul National University, Seoul, Republic of Korea.ORCID http://orcid.org/0000-0002-4023-3269
Hyoung-Ryoul KimDepartment of Occupational and Environmental Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.ORCID http://orcid.org/0000-0001-7535-3140
Mo-Yeol KangDepartment of Occupational and Environmental Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.ORCID https://orcid.org/0000-0002-1682-865X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThis systematic review and meta-analysis aimed to assess sedentary work's contribution to breast cancer risk quantitatively using thorough research articles.

methodsWe performed a meta-analysis using a registered protocol in PROSPERO (registration number: CRD42020204629). Literature from PubMed, Embase, and Cochrane involving sedentary work and breast cancer risk was reviewed. We calculated the overall pooled risk ratios (RRs) and 95% CI with a random-effect model from the included studies. Furthermore, we performed stratified analyses by characteristics of studies.

resultsThirty-one studies (13 cohort studies and 18 case-control studies) were included in the analysis. The overall effect of the pooled analysis was an RR of 1.16 (95% CI 1.08-1.23). The results were 1.20 (95% CI 1.10-1.30) and 1.12 (95% CI 1.02-1.23) for cohort and case-control studies. The effect of sedentary work did not seem to be consistently attenuated by controlling body mass index, menopausal status, or experience of hormone replacement therapy.

conclusionThe results from this meta-analysis suggest that sedentary behavior within the occupational domain was associated with a 15.5% increased risk of breast cancer. It is essential to reduce the sedentary time spent at work and to secure time for leisure-time physical activity among sedentary workers as a primary preventive measure.

Indexed as

Sedentary BehaviorAdultBreast NeoplasmsCase-Control StudiesCohort StudiesFemaleHumansMiddle AgedOccupational DiseasesOccupationsRisk Factorsbreast neoplasmsmeta-analysissedentary behaviorsedentary worksystematic review

Identifiers

PMID34161650
PMCPMC8221371

What OpenQuestion holds

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LicenceCC BY
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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.