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Dietary patterns and breast cancer risk in a prospective Japanese study.
Breast Cancer. 2017 Jan; 24(1):152-160.BC

Abstract

BACKGROUND

The association between dietary patterns and breast cancer has been inconsistent.

METHODS

This study examined associations between dietary patterns and risk of developing breast cancer among 23,172 women from the Japan Collaborative Cohort Study, including 119 incidences of breast cancer diagnosed during a median 16.9-year follow-up period. Factor analysis was conducted to obtain dietary patterns, and Cox proportional models were used to estimate hazard ratios (HR) and 95 % confidence intervals (95 % CI) for breast cancer morbidity.

RESULTS

Three dietary patterns were identified: ''vegetable pattern'' (vegetables, potatoes, seaweed, tofu, fruits, fresh fish, eggs, and miso soup); ''animal food pattern'' (meat, deep-fried foods, fried vegetables, fish paste and salt-preserved fish); and "dairy product pattern'' (milk, dairy products, fruits, coffee and tea). After adjusting for potential confounders, the vegetable and dairy product patterns were not significantly associated with risk of breast cancer. However, the animal food pattern was significantly associated with a decreased risk of breast cancer morbidity among premenopausal women by HR 0.47 for the 2nd tertile (95 % CI 0.22-1.00) and HR 0.42 for the 3rd tertile (95 % CI 0.18-0.93), compared with the bottom tertile (p for trend 0.04).

CONCLUSION

We found no significant association between the vegetable and dairy product dietary patterns and breast cancer risk; however, an animal product diet may reduce risk of breast cancer among premenopausal Japanese women.

Authors+Show Affiliations

Department of Public Health, Hokkaido University Graduate School of Medicine, North 15 West 7 Kita-ku, Sapporo, 060-8638, Japan. Department of Pediatrics, Japan Self-Defense Forces Sapporo Hospital, Hokkaido, 005-8543, Japan.Department of Public Health, Hokkaido University Graduate School of Medicine, North 15 West 7 Kita-ku, Sapporo, 060-8638, Japan.Department of Public Health, Hokkaido University Graduate School of Medicine, North 15 West 7 Kita-ku, Sapporo, 060-8638, Japan. s-ukawa@med.hokudai.ac.jp.Department of Public Health, School of Medicine, Sapporo Medical University, Hokkaido, 060-8556, Japan.Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, Aichi, 466-8550, Japan.Department of Food Science and Nutrition, School of Human Science and Environment, University of Hyogo, Hyogo, 670-0092, Japan.Public Health, Department of Social and Environmental Medicine, Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan.Department of Public Health, Hokkaido University Graduate School of Medicine, North 15 West 7 Kita-ku, Sapporo, 060-8638, Japan.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

26993124

Citation

Kojima, Reiji, et al. "Dietary Patterns and Breast Cancer Risk in a Prospective Japanese Study." Breast Cancer (Tokyo, Japan), vol. 24, no. 1, 2017, pp. 152-160.
Kojima R, Okada E, Ukawa S, et al. Dietary patterns and breast cancer risk in a prospective Japanese study. Breast Cancer. 2017;24(1):152-160.
Kojima, R., Okada, E., Ukawa, S., Mori, M., Wakai, K., Date, C., Iso, H., & Tamakoshi, A. (2017). Dietary patterns and breast cancer risk in a prospective Japanese study. Breast Cancer (Tokyo, Japan), 24(1), 152-160. https://doi.org/10.1007/s12282-016-0689-0
Kojima R, et al. Dietary Patterns and Breast Cancer Risk in a Prospective Japanese Study. Breast Cancer. 2017;24(1):152-160. PubMed PMID: 26993124.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dietary patterns and breast cancer risk in a prospective Japanese study. AU - Kojima,Reiji, AU - Okada,Emiko, AU - Ukawa,Shigekazu, AU - Mori,Mitsuru, AU - Wakai,Kenji, AU - Date,Chigusa, AU - Iso,Hiroyasu, AU - Tamakoshi,Akiko, Y1 - 2016/03/18/ PY - 2016/01/05/received PY - 2016/03/08/accepted PY - 2016/3/20/pubmed PY - 2017/2/6/medline PY - 2016/3/20/entrez KW - Breast cancer KW - Cohort study KW - Dietary pattern KW - Japanese SP - 152 EP - 160 JF - Breast cancer (Tokyo, Japan) JO - Breast Cancer VL - 24 IS - 1 N2 - BACKGROUND: The association between dietary patterns and breast cancer has been inconsistent. METHODS: This study examined associations between dietary patterns and risk of developing breast cancer among 23,172 women from the Japan Collaborative Cohort Study, including 119 incidences of breast cancer diagnosed during a median 16.9-year follow-up period. Factor analysis was conducted to obtain dietary patterns, and Cox proportional models were used to estimate hazard ratios (HR) and 95 % confidence intervals (95 % CI) for breast cancer morbidity. RESULTS: Three dietary patterns were identified: ''vegetable pattern'' (vegetables, potatoes, seaweed, tofu, fruits, fresh fish, eggs, and miso soup); ''animal food pattern'' (meat, deep-fried foods, fried vegetables, fish paste and salt-preserved fish); and "dairy product pattern'' (milk, dairy products, fruits, coffee and tea). After adjusting for potential confounders, the vegetable and dairy product patterns were not significantly associated with risk of breast cancer. However, the animal food pattern was significantly associated with a decreased risk of breast cancer morbidity among premenopausal women by HR 0.47 for the 2nd tertile (95 % CI 0.22-1.00) and HR 0.42 for the 3rd tertile (95 % CI 0.18-0.93), compared with the bottom tertile (p for trend 0.04). CONCLUSION: We found no significant association between the vegetable and dairy product dietary patterns and breast cancer risk; however, an animal product diet may reduce risk of breast cancer among premenopausal Japanese women. SN - 1880-4233 UR - https://www.unboundmedicine.com/medline/citation/26993124/Dietary_patterns_and_breast_cancer_risk_in_a_prospective_Japanese_study_ L2 - https://dx.doi.org/10.1007/s12282-016-0689-0 DB - PRIME DP - Unbound Medicine ER -