Dietary factors protective against breast cancer in Japanese premenopausal and postmenopausal women
Open accessAbstract
Since components of the Japanese diet that might be responsible for the relatively low breast cancer incidence rates observed in Japan have not been clarified in detail, a case‐referent study with reference to menopausal status was conducted using data from the hospital‐based epidemiologic research program at Aichi Cancer Center (HERPACC). In total, 2,385 breast cancer cases were included, and 19,013 women, confirmed as free of cancer, were recruited as the reference group. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were determined by multiple logistic regression analysis. There were reductions in risk associated with high intake of milk and green–yellow vegetables (green leafy vegetables, carrots and pumpkins) among both pre‐ and postmenopausal women. The protective effects of the Japanese diet were more prominent among postmenopausal than premenopausal women. The adjusted OR of fish consumption (5 or more times per week vs. fewer than 3 times per month) was 0.75 (95% CI 0.57–0.98, ptrend = 0.01) for postmenopausal breast cancer. A significant decrease in postmenopausal breast cancer risk was also observed for increasing intake of fruit (OR = 0.61, 95% CI 0.41–0.91). Thus, traditional Japanese dietary factors may protect against breast cancer development, especially among postmenopausal women. © 2003 Wiley‐Liss, Inc.
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Of 44 case-control studies, 32 showed higher consumption of soy foods and/or soy isoflavones was associated with lower risk for primary breast cancer, breast cancer mortality, or improved markers of prognosis among the overall study population.
“Overall, of the 44 case control studies, 32 showed that higher consumption of soy foods and/ or soy isoflavones was associated with lower risk for primary breast cancer [42-46,49-51,53,54,56-58,61-64,66,71-73,75,77-79,81,83], breast cancer mortality [55], or improved markers of prognosis (ER+ status vs receptor negative status) [74,82] among the overall study population.”
From Soy, Red Clover, and Isoflavones and Breast Cancer: A Systematic Review (2013) · cites this paper as [54]
The Results (page unavailable) report lower breast-cancer risk with higher tofu intake in premenopausal women, so this paper supports its inclusion as a case-control study finding an inverse association. The same passage says the association was not found in postmenopausal women; it therefore does not support the claim's qualification that the finding applied to the overall study population. (LLM, conf=0.87)
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Epidemiology of soy exposures and breast cancer risk
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Soy, Red Clover, and Isoflavones and Breast Cancer: A Systematic Review
Fritz, H., Seely, D., Flower, G., Skidmore, B., Fernandes, R., Vadeboncoeur, S., Kennedy, D., Cooley, K., Wong, R., Sagar, S., et al. (2013) · PLoS ONE · doi:10.1371/journal.pone.0081968 · Cited by 188 · see citing works
Magaki, M., Ishii, H., Yamasaki, A., Kitai, Y., Kametani, S., Nakai, R., Dabid, A., Tsuda, H., & Ohnishi, T. (2017) · Journal of Toxicologic Pathology · doi:10.1293/tox.2016-0052 · Cited by 10 · see citing works
- Authors
- Hirose, K., Takezaki, T., Hamajima, N., Miura, S., & Tajima, K.
- Affiliations
- Aichi Cancer Center Research Institute (JP)
- Nagoya University (JP)
- Aichi Cancer Center (JP)
- Corresponding author
- Hirose, Kaoru
- Venue
- International Journal of Cancer
- Publisher
- Wiley
- Published
- 2003-07-16
- Volume
- 107
- Issue
- 2
- Pages
- 276-282
- ISSN
- 0020-7136 (ISSN-L)
- 1097-0215
- OpenAlex
- W2052695128
- Cited by
- 100
- References
- 2
- Citations by year
- 2025: 2 · 2024: 2 · 2023: 1 · 2022: 1 · 2021: 8 · 2020: 2 · 2019: 3 · 2018: 3 · 2017: 2 · 2016: 3 · 2015: 2 · 2014: 6 · 2013: 5 · 2012: 4
- FWCI
- 5.77
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- International Journal of Cancer (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
- Health Sciences › Medicine › Oncology › Cancer Risks and Factors
- Health Sciences › Medicine › Oncology › Global Cancer Incidence and Screening
- Keywords
- breast cancer, Japanese diet, dietary factors, postmenopausal women, premenopausal women, milk consumption, leafy vegetables, fish consumption, fruit consumption, cancer risk reduction
- MeSH terms
- Adult, Aged, Breast Neoplasms, Diet, Feeding Behavior, Female, Humans, Japan, Middle Aged, Risk Factors, Body Mass Index, Odds Ratio, Case-Control Studies, Age Distribution, Premenopause, Postmenopause
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