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Association between green tea/coffee consumption and biliary tract cancer: A population‐based cohort study in Japan

Green tea and coffee consumption may decrease the risk of some types of cancers. However, their effects on biliary tract cancer (BTC) have been poorly understood. In this population‐based prospective cohort study in Japan, we investigated the association of green tea (total green tea, Sencha, and Ba...

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Autores principales: Makiuchi, Takeshi, Sobue, Tomotaka, Kitamura, Tetsuhisa, Ishihara, Junko, Sawada, Norie, Iwasaki, Motoki, Sasazuki, Shizuka, Yamaji, Taiki, Shimazu, Taichi, Tsugane, Shoichiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4724819/
https://www.ncbi.nlm.nih.gov/pubmed/26530716
http://dx.doi.org/10.1111/cas.12843
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author Makiuchi, Takeshi
Sobue, Tomotaka
Kitamura, Tetsuhisa
Ishihara, Junko
Sawada, Norie
Iwasaki, Motoki
Sasazuki, Shizuka
Yamaji, Taiki
Shimazu, Taichi
Tsugane, Shoichiro
author_facet Makiuchi, Takeshi
Sobue, Tomotaka
Kitamura, Tetsuhisa
Ishihara, Junko
Sawada, Norie
Iwasaki, Motoki
Sasazuki, Shizuka
Yamaji, Taiki
Shimazu, Taichi
Tsugane, Shoichiro
author_sort Makiuchi, Takeshi
collection PubMed
description Green tea and coffee consumption may decrease the risk of some types of cancers. However, their effects on biliary tract cancer (BTC) have been poorly understood. In this population‐based prospective cohort study in Japan, we investigated the association of green tea (total green tea, Sencha, and Bancha/Genmaicha) and coffee consumption with the risk for BTC and its subtypes, gallbladder cancer, and extrahepatic bile duct cancer. The hazard ratios and 95% confidence intervals were calculated using the Cox proportional hazard model. A total of 89 555 people aged 45–74 years were enrolled between 1995 and 1999 and followed up for 1 138 623 person‐years until 2010, during which 284 cases of BTC were identified. Consumption of >720 mL/day green tea was significantly associated with decreased risk compared with consumption of ≤120 mL/day (hazard ratio = 0.67 [95% confidence interval, 0.46–0.97]), and a non‐significant trend of decreased risk associated with increased consumption was observed (P‐trend = 0.095). In the analysis according to the location of the primary tumor, consuming >120 mL green tea tended to be associated with decreased risk of gallbladder cancer and extrahepatic bile duct cancer. When Sencha and Bancha/Genmaicha were analyzed separately, we observed a non‐significant trend of decreased risk of BTC associated with Sencha but no association with Bancha/Genmaicha. For coffee, there was no clear association with biliary tract, gallbladder, or extrahepatic bile duct cancer. Our findings suggest that high green tea consumption may lower the risk of BTC, and the effect may be attributable to Sencha consumption.
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spelling pubmed-47248192016-02-03 Association between green tea/coffee consumption and biliary tract cancer: A population‐based cohort study in Japan Makiuchi, Takeshi Sobue, Tomotaka Kitamura, Tetsuhisa Ishihara, Junko Sawada, Norie Iwasaki, Motoki Sasazuki, Shizuka Yamaji, Taiki Shimazu, Taichi Tsugane, Shoichiro Cancer Sci Original Articles Green tea and coffee consumption may decrease the risk of some types of cancers. However, their effects on biliary tract cancer (BTC) have been poorly understood. In this population‐based prospective cohort study in Japan, we investigated the association of green tea (total green tea, Sencha, and Bancha/Genmaicha) and coffee consumption with the risk for BTC and its subtypes, gallbladder cancer, and extrahepatic bile duct cancer. The hazard ratios and 95% confidence intervals were calculated using the Cox proportional hazard model. A total of 89 555 people aged 45–74 years were enrolled between 1995 and 1999 and followed up for 1 138 623 person‐years until 2010, during which 284 cases of BTC were identified. Consumption of >720 mL/day green tea was significantly associated with decreased risk compared with consumption of ≤120 mL/day (hazard ratio = 0.67 [95% confidence interval, 0.46–0.97]), and a non‐significant trend of decreased risk associated with increased consumption was observed (P‐trend = 0.095). In the analysis according to the location of the primary tumor, consuming >120 mL green tea tended to be associated with decreased risk of gallbladder cancer and extrahepatic bile duct cancer. When Sencha and Bancha/Genmaicha were analyzed separately, we observed a non‐significant trend of decreased risk of BTC associated with Sencha but no association with Bancha/Genmaicha. For coffee, there was no clear association with biliary tract, gallbladder, or extrahepatic bile duct cancer. Our findings suggest that high green tea consumption may lower the risk of BTC, and the effect may be attributable to Sencha consumption. John Wiley and Sons Inc. 2016-01-25 2016-01 /pmc/articles/PMC4724819/ /pubmed/26530716 http://dx.doi.org/10.1111/cas.12843 Text en © 2015 The Authors. Cancer Science published by John Wiley & Sons Australia, Ltd on behalf of Japanese Cancer Association. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial (http://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Original Articles
Makiuchi, Takeshi
Sobue, Tomotaka
Kitamura, Tetsuhisa
Ishihara, Junko
Sawada, Norie
Iwasaki, Motoki
Sasazuki, Shizuka
Yamaji, Taiki
Shimazu, Taichi
Tsugane, Shoichiro
Association between green tea/coffee consumption and biliary tract cancer: A population‐based cohort study in Japan
title Association between green tea/coffee consumption and biliary tract cancer: A population‐based cohort study in Japan
title_full Association between green tea/coffee consumption and biliary tract cancer: A population‐based cohort study in Japan
title_fullStr Association between green tea/coffee consumption and biliary tract cancer: A population‐based cohort study in Japan
title_full_unstemmed Association between green tea/coffee consumption and biliary tract cancer: A population‐based cohort study in Japan
title_short Association between green tea/coffee consumption and biliary tract cancer: A population‐based cohort study in Japan
title_sort association between green tea/coffee consumption and biliary tract cancer: a population‐based cohort study in japan
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4724819/
https://www.ncbi.nlm.nih.gov/pubmed/26530716
http://dx.doi.org/10.1111/cas.12843
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