Reproductive Risk Factors Associated with Breast Cancer Molecular Subtypes among Young Women in Northern China
Joint Authors
Wang, Jian Ming
Wang, Jun
Zhao, Hong Guang
Liu, Tong Tong
Wang, Fei Yang
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-04-07
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Purpose.
Accumulated evidence suggests that reproductive factors are related to different breast cancer subtypes, but most studies on these relationships are mainly focused on middle-aged and older patients, and it remains unclear how reproductive factors impact different subtypes of breast cancer in young women.
Methods.
We assessed the relationships between fertility factors and luminal A, luminal B, human epidermal growth factor receptor 2 (HER2)-enriched, and triple-negative breast cancer (TNBC) subtypes in 3792 patients and 4182 controls aged 20–70 years.
Data on the reproductive history of the study participants were acquired through face-to-face interviews and questionnaires.
We conducted case-control comparisons among tumor subtypes based on estrogen receptor (ER), progesterone receptor (PR), and HER2 statuses using unconditional polychotomous multivariate logistic regression models to compute odds ratios (ORs) and 95% confidence intervals (CIs).
Results.
Parity was inversely related to both luminal A and luminal B subtypes in young women and older women (all Ptrend<0.05).
Later age at first full-term birth was inversely related to the luminal A subtype (Ptrend<0.05) in young women but correlated with an increased risk of the luminal A subtype (Ptrend<0.05) in older women.
Parous Chinese women 40 years old or younger who breastfed for 12 months or longer had a lower risk of luminal B and TNBC subtypes than women who never breastfed (OR=0.55, 95% CI 0.36-0.84 and OR=0.52, 95% CI 0.28-0.99, respectively).
Conclusions.
Our results implied that parity exerted a strong protective effect against luminal A and luminal B subtype breast cancer in young Chinese women, and long-term breastfeeding obviously decreased the risk of luminal B and TNBC subtypes in this population.
American Psychological Association (APA)
Wang, Jian Ming& Wang, Jun& Zhao, Hong Guang& Liu, Tong Tong& Wang, Fei Yang. 2020. Reproductive Risk Factors Associated with Breast Cancer Molecular Subtypes among Young Women in Northern China. BioMed Research International،Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1135108
Modern Language Association (MLA)
Wang, Jian Ming…[et al.]. Reproductive Risk Factors Associated with Breast Cancer Molecular Subtypes among Young Women in Northern China. BioMed Research International No. 2020 (2020), pp.1-9.
https://search.emarefa.net/detail/BIM-1135108
American Medical Association (AMA)
Wang, Jian Ming& Wang, Jun& Zhao, Hong Guang& Liu, Tong Tong& Wang, Fei Yang. Reproductive Risk Factors Associated with Breast Cancer Molecular Subtypes among Young Women in Northern China. BioMed Research International. 2020. Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1135108
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1135108