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Dietary pattern and breast cancer risk in Japanese women: the Japan Public Health Center-based Prospective Study (JPHC Study).
Br J Nutr. 2016 May 28; 115(10):1769-79.BJ

Abstract

Evidence that diet is associated with breast cancer risk is inconsistent. Most of the studies have focused on risks associated with specific foods and nutrients, rather than overall diet. In this study, we aimed to evaluate the association between dietary patterns and breast cancer risk in Japanese women. A total of 49 552 Japanese women were followed-up from 1995 to 1998 (5-year follow-up survey) until the end of 2012 for an average of 14·6 years. During 725 534 person-years of follow-up, 718 cases of breast cancer were identified. We identified three dietary patterns (prudent, westernised and traditional Japanese). The westernised dietary pattern was associated with a 32 % increase in breast cancer risk (hazard ratios (HR) 1·32; 95 % CI 1·03, 1·70; P trend=0·04). In particular, subjects with extreme intake of the westernised diet (quintile (Q) Q5_5th) had an 83 % increase in risk of breast cancer in contrast to those in the lowest Q1 (HR 1·83; 95 % CI 1·25, 2·68; P trend=0·01). In analyses stratified by menopausal status, postmenopausal subjects in the highest quintile of the westernised dietary pattern had a 29 % increased risk of breast cancer (HR 1·29; 95 % CI 0·99, 1·76; P trend=0·04). With regard to hormone receptor status, the westernised dietary pattern was associated with an increased risk of oestrogen receptor-positive/progesterone receptor-positivetumours (HR 2·49; 95 % CI 1·40, 4·43; P trend<0·01). The other dietary patterns were not associated with the risk of breast cancer in Japanese women. A westernised dietary pattern is associated with an increased risk of breast cancer in Japanese women.

Authors+Show Affiliations

1Graduate School of Medicine,The University of Tokyo,7-3-1 Hongo,Bunkyo-ku,Tokyo 113-0033,Japan.1Graduate School of Medicine,The University of Tokyo,7-3-1 Hongo,Bunkyo-ku,Tokyo 113-0033,Japan.1Graduate School of Medicine,The University of Tokyo,7-3-1 Hongo,Bunkyo-ku,Tokyo 113-0033,Japan.2Epidemiology and Prevention Group,Research Center for Cancer Prevention and Screening,National Cancer Center,5-1-1 Tsukiji,Chuo-ku,Tokyo 104-0045,Japan.3Department of Nutrition Science,Sagami Women's University,2-1-1 Bunkyo,Minami-ku,Sagamihara 252-0383,Japan.4Department of Food Science and Nutrition, Faculty of Human Life and Environment,Nara Women's University,Kitauoyanishi-machi,Nara 630-8506,Japan.5Department of Epidemiology and Prevention,International Clinical Research Center,National Center for Global Health and Medicine,1-21-1 Toyama,Shinjuku-ku,Tokyo 162-8655,Japan.2Epidemiology and Prevention Group,Research Center for Cancer Prevention and Screening,National Cancer Center,5-1-1 Tsukiji,Chuo-ku,Tokyo 104-0045,Japan.2Epidemiology and Prevention Group,Research Center for Cancer Prevention and Screening,National Cancer Center,5-1-1 Tsukiji,Chuo-ku,Tokyo 104-0045,Japan.2Epidemiology and Prevention Group,Research Center for Cancer Prevention and Screening,National Cancer Center,5-1-1 Tsukiji,Chuo-ku,Tokyo 104-0045,Japan.2Epidemiology and Prevention Group,Research Center for Cancer Prevention and Screening,National Cancer Center,5-1-1 Tsukiji,Chuo-ku,Tokyo 104-0045,Japan.2Epidemiology and Prevention Group,Research Center for Cancer Prevention and Screening,National Cancer Center,5-1-1 Tsukiji,Chuo-ku,Tokyo 104-0045,Japan.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26997498

Citation

Shin, Sangah, et al. "Dietary Pattern and Breast Cancer Risk in Japanese Women: the Japan Public Health Center-based Prospective Study (JPHC Study)." The British Journal of Nutrition, vol. 115, no. 10, 2016, pp. 1769-79.
Shin S, Saito E, Inoue M, et al. Dietary pattern and breast cancer risk in Japanese women: the Japan Public Health Center-based Prospective Study (JPHC Study). Br J Nutr. 2016;115(10):1769-79.
Shin, S., Saito, E., Inoue, M., Sawada, N., Ishihara, J., Takachi, R., Nanri, A., Shimazu, T., Yamaji, T., Iwasaki, M., Sasazuki, S., & Tsugane, S. (2016). Dietary pattern and breast cancer risk in Japanese women: the Japan Public Health Center-based Prospective Study (JPHC Study). The British Journal of Nutrition, 115(10), 1769-79. https://doi.org/10.1017/S0007114516000684
Shin S, et al. Dietary Pattern and Breast Cancer Risk in Japanese Women: the Japan Public Health Center-based Prospective Study (JPHC Study). Br J Nutr. 2016 May 28;115(10):1769-79. PubMed PMID: 26997498.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dietary pattern and breast cancer risk in Japanese women: the Japan Public Health Center-based Prospective Study (JPHC Study). AU - Shin,Sangah, AU - Saito,Eiko, AU - Inoue,Manami, AU - Sawada,Norie, AU - Ishihara,Junko, AU - Takachi,Ribeka, AU - Nanri,Akiko, AU - Shimazu,Taichi, AU - Yamaji,Taiki, AU - Iwasaki,Motoki, AU - Sasazuki,Shizuka, AU - Tsugane,Shoichiro, Y1 - 2016/03/21/ PY - 2016/3/22/entrez PY - 2016/3/22/pubmed PY - 2016/9/1/medline KW - Breast cancer KW - Cohort studies KW - Dietary patterns KW - ER oestrogen receptor KW - Epidemiological studies KW - Factor analyses KW - PR progesterone receptor KW - Q quintile SP - 1769 EP - 79 JF - The British journal of nutrition JO - Br. J. Nutr. VL - 115 IS - 10 N2 - Evidence that diet is associated with breast cancer risk is inconsistent. Most of the studies have focused on risks associated with specific foods and nutrients, rather than overall diet. In this study, we aimed to evaluate the association between dietary patterns and breast cancer risk in Japanese women. A total of 49 552 Japanese women were followed-up from 1995 to 1998 (5-year follow-up survey) until the end of 2012 for an average of 14·6 years. During 725 534 person-years of follow-up, 718 cases of breast cancer were identified. We identified three dietary patterns (prudent, westernised and traditional Japanese). The westernised dietary pattern was associated with a 32 % increase in breast cancer risk (hazard ratios (HR) 1·32; 95 % CI 1·03, 1·70; P trend=0·04). In particular, subjects with extreme intake of the westernised diet (quintile (Q) Q5_5th) had an 83 % increase in risk of breast cancer in contrast to those in the lowest Q1 (HR 1·83; 95 % CI 1·25, 2·68; P trend=0·01). In analyses stratified by menopausal status, postmenopausal subjects in the highest quintile of the westernised dietary pattern had a 29 % increased risk of breast cancer (HR 1·29; 95 % CI 0·99, 1·76; P trend=0·04). With regard to hormone receptor status, the westernised dietary pattern was associated with an increased risk of oestrogen receptor-positive/progesterone receptor-positivetumours (HR 2·49; 95 % CI 1·40, 4·43; P trend<0·01). The other dietary patterns were not associated with the risk of breast cancer in Japanese women. A westernised dietary pattern is associated with an increased risk of breast cancer in Japanese women. SN - 1475-2662 UR - https://www.unboundmedicine.com/medline/citation/26997498/Dietary_pattern_and_breast_cancer_risk_in_Japanese_women:_the_Japan_Public_Health_Center_based_Prospective_Study__JPHC_Study__ L2 - https://www.cambridge.org/core/product/identifier/S0007114516000684/type/journal_article DB - PRIME DP - Unbound Medicine ER -