TY - JOUR
T1 - The relationship between green tea and total caffeine intake and risk for self-reported type 2 diabetes among Japanese adults
AU - Iso, Hiroyasu
AU - Date, Chigusa
AU - Wakai, Kenji
AU - Fukui, Mitsuru
AU - Tamakoshi, Akiko
AU - Mori, Mitsuru
AU - Motohashi, Yutaka
AU - Tsuji, Ichiro
AU - Nakamura, Yosikazu
AU - Mikami, Haruo
AU - Hashimoto, Shuji
AU - Inaba, Yutaka
AU - Hoshiyama, Yoshiharu
AU - Suzuki, Hiroshi
AU - Shimizu, Hiroyuki
AU - Toyoshima, Hideaki
AU - Tokudome, Shinkan
AU - Ito, Yoshinori
AU - Kikuchi, Shogo
AU - Koizumi, Akio
AU - Kawamura, Takashi
AU - Watanabe, Yoshiyuki
AU - Miki, Tsuneharu
AU - Sakata, Kiyomi
AU - Nose, Takayuki
AU - Hayakawa, Norihiko
AU - Yoshimura, Takesumi
AU - Fukuda, Katsuhiro
AU - Okamoto, Naoyuki
AU - Shio, Hideo
AU - Ohno, Yoshiyuki
AU - Kitagawa, Tomoyuki
AU - Kuroki, Toshio
AU - Tajima, Kazuo
PY - 2006/4/18
Y1 - 2006/4/18
N2 - Background: In western populations, coffee consumption is associated with a reduced risk for type 2 diabetes; however, the effect of green, black, and oolong teas is unclear. Objective: To examine the relationship between consumption of these beverages and risk for diabetes. Design: Retrospective cohort study. Setting: 25 communities across Japan. Participants: A total of 17 413 persons (6727 men and 10 686 women; 49% of the original study population) who were 40 to 65 years of age; had no history of type 2 diabetes, cardiovascular disease, or cancer at the baseline lifestyle survey; and completed the 5-year follow-up questionnaire. There was no difference in body mass index levels at baseline between respondents and nonrespondents. Measurements: Questionnaire on consumption of coffee; black, green, and oolong teas; and physician-diagnosed diabetes. Results: During the 5-year follow-up, there were 444 self-reported new cases of diabetes in 231 men and 213 women (5-year event rates, 3.4% and 2.0%, respectively). Consumption of green tea and coffee was inversely associated with risk for diabetes after adjustment for age, sex, body mass index, and other risk factors. Multivariable odds ratios for diabetes among participants who frequently drank green tea and coffee (≥6 cups of green tea per day and ≥3 cups of coffee per day) were 0.67 (95% CI, 0.47 to 0.94) and 0.58 (CI, 0.37 to 0.90), respectively, compared with those who drank less than 1 cup per week. No association was found between consumption of black or oolong teas and the risk for diabetes. Total caffeine intake from these beverages was associated with a 33% reduced risk for diabetes. These inverse associations were more pronounced in women and in overweight men. Limitations: Diabetes was self-reported, no data were available on consumption of soda, and the follow-up rate was low. Conclusions: Consumption of green tea, coffee, and total caffeine was associated with a reduced risk for type 2 diabetes.
AB - Background: In western populations, coffee consumption is associated with a reduced risk for type 2 diabetes; however, the effect of green, black, and oolong teas is unclear. Objective: To examine the relationship between consumption of these beverages and risk for diabetes. Design: Retrospective cohort study. Setting: 25 communities across Japan. Participants: A total of 17 413 persons (6727 men and 10 686 women; 49% of the original study population) who were 40 to 65 years of age; had no history of type 2 diabetes, cardiovascular disease, or cancer at the baseline lifestyle survey; and completed the 5-year follow-up questionnaire. There was no difference in body mass index levels at baseline between respondents and nonrespondents. Measurements: Questionnaire on consumption of coffee; black, green, and oolong teas; and physician-diagnosed diabetes. Results: During the 5-year follow-up, there were 444 self-reported new cases of diabetes in 231 men and 213 women (5-year event rates, 3.4% and 2.0%, respectively). Consumption of green tea and coffee was inversely associated with risk for diabetes after adjustment for age, sex, body mass index, and other risk factors. Multivariable odds ratios for diabetes among participants who frequently drank green tea and coffee (≥6 cups of green tea per day and ≥3 cups of coffee per day) were 0.67 (95% CI, 0.47 to 0.94) and 0.58 (CI, 0.37 to 0.90), respectively, compared with those who drank less than 1 cup per week. No association was found between consumption of black or oolong teas and the risk for diabetes. Total caffeine intake from these beverages was associated with a 33% reduced risk for diabetes. These inverse associations were more pronounced in women and in overweight men. Limitations: Diabetes was self-reported, no data were available on consumption of soda, and the follow-up rate was low. Conclusions: Consumption of green tea, coffee, and total caffeine was associated with a reduced risk for type 2 diabetes.
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U2 - 10.7326/0003-4819-144-8-200604180-00005
DO - 10.7326/0003-4819-144-8-200604180-00005
M3 - Article
C2 - 16618952
AN - SCOPUS:33645977193
SN - 0003-4819
VL - 144
SP - 554
EP - 562
JO - Annals of Internal Medicine
JF - Annals of Internal Medicine
IS - 8
ER -
