ArticleBritish journal of cancer2014
Reproductive risk factors and oestrogen/progesterone receptor-negative breast cancer in the Breast Cancer Family Registry.
Article in British journal of cancer, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 3 of them syntheses that pooled it.
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Who cites it
42 citing papers in PubMed, 3 syntheses or guidelines pooled it, 82 citations in OpenAlex.
- Association of reproductive risk factors and breast cancer molecular subtypes: a systematic review and meta-analysis.BMC cancer · 2023Pooled it
- Breastfeeding and maternal health outcomes: a systematic review and meta-analysis.Acta paediatrica (Oslo, Norway : 1992) · 2015Pooled it
- Breastfeeding and breast cancer risk by receptor status--a systematic review and meta-analysis.Annals of oncology : official journal of the European Society for Medical Oncology · 2015Pooled it
- Reproductive factors and risk of contralateral breast cancer by age and hormone receptor status: The California Breast Cancer Survivorship Consortium.International journal of cancer · 2026Article
- Modifiable and Nonmodifiable Risk Factors for Breast Cancer: A Comprehensive Scoping Review.International journal of breast cancer · 2026Review
- Pregnancy associated breast cancer: correlation between parity and ultrasonic characteristics of tumors & background echotexture.Cancer imaging : the official publication of the International Cancer Imaging Society · 2025Article
- Reproductive determinants of mammographic density in black women.Cancer causes & control : CCC · 2025Article
- Modifiable Risk Factors Including Self-Perceived Stress for Breast Cancer in Hong Kong: A Case-Control Study of 10 757 Subject.Clinical Medicine Insights. Oncology · 2025Article
- Pregnancy-Related Factors and Breast Cancer Risk for Women Across a Range of Familial Risk.JAMA network open · 2024Article
- Reproductive characteristics, menopausal status, race and ethnicity, and risk of breast cancer subtypes defined by ER, PR and HER2 status: the Breast Cancer Etiology in Minorities study.Breast cancer research : BCR · 2024Article
- Disparities in Breast Cancer Care-How Factors Related to Prevention, Diagnosis, and Treatment Drive Inequity.Healthcare (Basel, Switzerland) · 2024Review
- The effect of parity, breastfeeding history, and duration on clinical and pathological characteristics of breast cancer patients.Turkish journal of medical sciences · 2024Article
- Epidemiology and Risk Factors for Breast Cancer: 21st Century Advances, Gaps to Address through Interdisciplinary Science.Cold Spring Harbor perspectives in medicine · 2023Review
- Host, reproductive, and lifestyle factors in relation to quantitative histologic metrics of the normal breast.Breast cancer research : BCR · 2023Article
- Review
- Gestational diabetes and risk of breast cancer before age 55 years.International journal of epidemiology · 2022Article
- A Validated Risk Prediction Model for Breast Cancer in US Black Women.Journal of clinical oncology : official journal of the American Society of Clinical Oncology · 2021Article
- Review
- Menstrual and reproductive characteristics and breast cancer risk by hormone receptor status and ethnicity: The Breast Cancer Etiology in Minorities study.International journal of cancer · 2020Article
- Reproductive factors and risk of breast cancer by tumor subtypes among Ghanaian women: A population-based case-control study.International journal of cancer · 2020Article
Corrections and comments
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Authors and funding
13 authors at 9 institutions in 4 countries.
Funding
Abstract
backgroundOestrogen receptor (ER)- and progesterone receptor (PR)-negative (ER-PR-) breast cancer is associated with poorer prognosis compared with other breast cancer subtypes. High parity has been associated with an increased risk of ER-PR- cancer, but emerging evidence suggests that breastfeeding may reduce this risk. Whether this potential breastfeeding benefit extends to women at high risk of breast cancer remains critical to understand for prevention.
methodsUsing population-based ascertained cases (n=4011) and controls (2997) from the Breast Cancer Family Registry, we examined reproductive risk factors in relation to ER and PR status.
resultsHigh parity (≥3 live births) without breastfeeding was positively associated only with ER-PR- tumours (odds ratio (OR)=1.57, 95% confidence interval (CI), 1.10-2.24); there was no association with parity in women who breastfed (OR=0.93, 95% CI 0.71-1.22). Across all race/ethnicities, associations for ER-PR- cancer were higher among women who did not breastfeed than among women who did. Oral contraceptive (OC) use before 1975 was associated with an increased risk of ER-PR- cancer only (OR=1.32, 95% CI 1.04-1.67). For women who began OC use in 1975 or later there was no increased risk.
conclusionsOur findings support that there are modifiable factors for ER-PR- breast cancer and that breastfeeding in particular may mitigate the increased risk of ER-PR- cancers seen from multiparity.
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