Evidence map›Paper›PMID 33010023›Full record

ArticleBreast cancer research and treatment2021

Obesity and breast cancer risk for pre- and postmenopausal women among over 6 million Korean women.

Jae Won Park, Kyungdo Han, Dong Wook Shin, Yohwan Yeo, Ji Won Chang, Jung Eun Yoo, Su-Min Jeong, Se-Kyung Lee, Jai Min Ryu, Yong-Moon Park

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Article in Breast cancer research and treatment, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed, 2 pooled it
3.2field-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

45 citing papers in PubMed, 2 syntheses or guidelines pooled it, 72 citations in OpenAlex.

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  16. Smoking behavior changes and risk of cardiovascular diseases after cancer diagnosis: a nationwide cohort study.Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer · 2025
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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

10 authors at 5 institutions in 2 countries.

Jae Won Park *Department of Family Medicine & Supportive Care Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-Ro, Gangnam-gu, Seoul, 06351, Korea.
Kyungdo Han *Department of Statistics and Actuarial Science, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul, 06978, Korea. hkd917@naver.com.
Dong Wook Shin *Department of Family Medicine & Supportive Care Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-Ro, Gangnam-gu, Seoul, 06351, Korea. dwshin.md@gmail.com.ORCID http://orcid.org/0000-0001-8128-8920
Yohwan YeoDepartment of Family Medicine & Supportive Care Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-Ro, Gangnam-gu, Seoul, 06351, Korea.
Ji Won ChangDepartment of Family Medicine & Supportive Care Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-Ro, Gangnam-gu, Seoul, 06351, Korea.
Jung Eun YooDepartment of Family Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea.
Su-Min JeongDepartment of Family Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Republic of Korea.
Se-Kyung LeeDivision of Breast Surgery, Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
Jai Min RyuDivision of Breast Surgery, Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
Yong-Moon ParkEpidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, Durham, NC, USA.
Samsung Medical Center · KRHarvard University · USSeoul National University Hospital · KRSoongsil University · KRTriangle · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo examine the association between obesity measured by body mass index (BMI) and waist circumference (WC) according to menopausal status in Korean women.

methodsWe identified 6,467,388 women, using the Korean National Health Insurance System Cohort. Cox-proportional hazard models were used to generate adjusted hazard ratios (aHRs) and 95% confidence intervals (CIs) for breast cancer risk in relation to BMI and WC.

resultsIn postmenopausal women, the risk of breast cancer increased with BMI. Compared to women with a BMI of 18.5-23 kg/m two, the risk of invasive breast cancer was lower in patients with BMI < 18.5 (aHR 0.82, 95% CI 0.75-0.89), while it increased linearly in those with BMI 23-25 (1.11, 1.08-1.14), BMI 25-30 (1.28, 1.25-1.32), and BMI ≥ 30 (1.54,1.47-1.62). In contrast, the risk of breast cancer decreased with BMI in premenopausal women. Compared to women with a BMI of 18.5-23, the risk of IBC was similar in those with a BMI < 18.5 (1.02, 0.94-1.11) and BMI 23-25 (1.01, 0.97-1.05), but was significantly lower in those with a BMI 25-30 (0.95, 0.91-0.98) and BMI ≥ 30 (0.90, 0.82-0.98). A relative increase with BMI was less profound for carcinoma in situ in postmenopausal women, and a relative decrease was more profound in premenopausal women. An analysis using WC showed almost identical results.

conclusionsThere was a positive relationship between obesity and breast cancer in postmenopausal women, and an inverse association in premenopausal women.

Indexed as

Breast NeoplasmsObesityPostmenopauseAgedBody Mass IndexFemaleHumansMiddle AgedRepublic of KoreaRisk FactorsBody mass indexBreast cancerMenopauseObesityWaist circumference

Identifiers

PMID33010023
OpenAlexW3089392214

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.