Green tea and coffee consumption and risk of kidney cancer in Japanese adults
Yichi Chen, Sarah Krull Abe, Manami Inoue, Taiki Yamaji, Motoki Iwasaki, Shuhei Nomura, Masahiro Hashizume, Shoichiro Tsugane, Norie Sawada, Norie Sawada, Norie Sawada, Shoichiro Tsugane, Motoki Iwasaki, Manami Inoue, Taiki Yamaji, Ryoko Katagiri, Yoshihisa Miyamoto, Hikaru Ihira, Sarah Krull Abe, Shigeru Tanaka, T. moriya, T. Minamizono, Yoshiro Shirai, H. Kuniyoshi, T. Yoshimi, H. Sonoda, Takashi Tagami, T. Ando, Takashi Kimura, Yoshihiro Kokubo, Kazumasa Yamagishi, Tetsuya Mizoue, Kenichi Nakamura, R. Takachi, Junko Ishihara, Hirokazu Iso, Tetsuhisa Kitamura, Isao Saito, Nobufumi Yasuda, Masaru Mimura, Kiyomi Sakata, Mitsuhiko Noda, Atsushi Goto, Hiroshi Yatsuya, Masaru Mimura, H. Yatsuya, Tomoyuki Hanaoka, Akihisa Hidaka, Shizuka Sasazuki, Hadrien Charvat, Taichi Shimazu, Sanjeev Budhathoki, M. Muto, Takuya Imatoh, J. Ogata, Shinichi Baba, Toshifumi Mannami, Akira Okayama, Keiko Miyakawa, Fumitake Saito, Aya Koizumi, Yujiro Sano, Isamu Hashimoto, Tomoki Ikuta, Y. Tanaba, Hidehiko Sato, Y. Roppongi, Tomoyuki Takashima, Hideaki Suzuki, T. Sugie, Yoshimichi Miyajima, Naoya Suzuki, S. Nagasawa, Y. Furusugi, Naoko Nagai, Yoshihiko Ito, S. Komatsu, Hironobu Sanada, Yoshiomi Hatayama, F Kobayashi, H Uchino, Yoshiro Shirai, Takaaki Kondo, Ryohei Sasaki, Yasuyoshi Watanabe, Yusuke Miyagawa, Yoritoshi Kobayashi, Munehito Machida, Kensei Kobayashi, Manabu Tsukada, Yoshimi Kishimoto, E Takara, T. Fukuyama, Minori Kinjo, M. Irei, M. Kinjo, M. Irei, Koji Imoto, H. Yazawa, Toru Seo
Abstract
The study aimed to evaluate the association between green tea and coffee consumption and the risk of kidney cancer using data from a large prospective cohort study in Japan (the Japan Public Health Center-based Prospective Study: JPHC Study). A total of 102,463 participants aged 40-69 were followed during 1,916,421 person-years (mean follow-up period, 19 years). A total of 286 cases of kidney cancer (199 in men, 87 in women) were identified. Cox proportional hazards regression models were used to estimate hazard ratios (HRs) and 95% confidence intervals (95% CIs) while adjusting for potential confounders. No statistically significant association between green tea intake and kidney cancer risk was found in the total population. Among women who consumed more than five cups of green tea per day, a statistically significant decreased risk was shown with a HR of 0.45 (95% CI: 0.23-0.89), compared to women who rarely consumed green tea. For coffee consumption, the association of kidney cancer risk was not statistically significant. This large prospective cohort study indicated green tea intake may be inversely associated with kidney cancer risk in Japanese adults, particularly in Japanese women.