Coffee, tea, and incident type 2 diabetes: the Singapore Chinese Health Study

Odegaard, Andrew O.; Pereira, Mark A.; Koh, Woon Puay; Arakawa, Kazuko; Lee, Hin Peng; Yu, Mimi C.

doi:10.1093/ajcn/88.4.979

Cited by 167 publications

(156 citation statements)

References 52 publications

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“…The enquiry about history of these diseases was made by asking if the participant has been told by a physician that he/she had any of these diseases in separate questions. Using standard protocols, separate studies validated the accuracy of the self‐reported diabetes mellitus8 and hypertension9 in this cohort. The robustness and accuracy of the self‐reported diabetes mellitus data were validated in a separate study analyzing 1651 cohort participants who reported history of diabetes mellitus at either baseline or follow‐up 1 interview, and 98.9% were confirmed by medical records or telephone interview 8…”

Section: Methodsmentioning

confidence: 87%

Association of “Elevated Blood Pressure” and “Stage 1 Hypertension” With Cardiovascular Mortality Among an Asian Population

Talaei

Hosseini

Koh

et al. 2018

JAHA

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BackgroundThe new American College of Cardiology/American Heart Association high blood pressure (BP) guidelines in the United States have lowered definition of hypertension by defining normal as systolic/diastolic BP <120/80 mm Hg; elevated BP as systolic between 120 and 129 mm Hg and diastolic <80 mm Hg; and stage 1 hypertension as systolic between 130 and 139 mm Hg or diastolic between 80 and 89 mm Hg.Methods and ResultsWe investigated the association between the new hypertension definition and cardiovascular disease mortality among Chinese in Singapore. We used data from 30 636 participants of a population‐based cohort, the SCHS (Singapore Chinese Health Study), who had BPs measured using a standard protocol at ages 46 to 85 years between 1994 and 2005. Information on lifestyle factors was collected at recruitment (1993–1998) and follow‐up 1 interviews (1999 and 2004). Mortality was identified via nationwide registry linkage up to December 31, 2016. Neither elevated BP (hazard ratio, 0.89; 95% confidence interval, 0.74–1.07) nor stage 1 hypertension (hazard ratio, 0.94; 95% confidence interval, 0.81–1.11) was associated with increased risk of cardiovascular mortality compared with normal BP in the whole cohort. Stage 1 hypertension was associated with increased cardiovascular risk only in those <65 years of age and without a history of cardiovascular disease (hazard ratio, 1.40; 95% confidence interval, 1.01–1.94), but not in those ≥65 years of age or with a history of cardiovascular disease.ConclusionsOur data suggest that the newly defined stage 1 hypertension may not be associated with increased cardiovascular mortality across all ages among Chinese in Singapore, but that the at‐risk subpopulation is limited to those <65 years of age and without a prior cardiovascular disease.

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Section: Methodsmentioning

confidence: 87%

Association of “Elevated Blood Pressure” and “Stage 1 Hypertension” With Cardiovascular Mortality Among an Asian Population

Talaei

Hosseini

Koh

et al. 2018

JAHA

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“…[26][27][28][29][30][31][32][33][34] Three studies involved women only, and the other six studies included both men and women. Mean age at baseline varied from 26 to 88 years.…”

Section: Resultsmentioning

confidence: 99%

“…26,28,[30][31][32]34 We evaluated possible heterogeneity of study results using the Q test (P<0.1 was considered representative of statistically significant heterogeneity) and the I 2 statistic. 46 If significant heterogeneity existed, sensitivity analyses were performed.…”

Section: Potentially Relevant Papersmentioning

confidence: 99%

“…To our knowledge, several epidemiologic studies [25][26][27][28][29][30][31][32][33][34] have been performed to investigate the association of tea consumption with type 2 diabetes; however, the results of these studies were not entirely consistent: some studies showed that tea consumption might reduce the risk of type 2 diabetes, 25,28,29,[32][33][34] whereas others found nonsignificant relationships between the two. 26,27,30,31 Because the relationship between tea consumption and risk of type 2 diabetes is still equivocal, we conducted this meta-analysis to further clarify this association based on the studies from the United States, Europe, and Asian countries.…”

Section: Introductionmentioning

confidence: 99%

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Tea Consumption and Risk of Type 2 Diabetes: A Meta-Analysis of Cohort Studies

Jing

Han

et al. 2009

J GEN INTERN MED

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BACKGROUND: Tea consumption has been extensively studied in relation to various diseases, several epidemiologic studies have been performed to investigate the association of tea consumption with type 2 diabetes; however, the results of these studies were not entirely consistent. OBJECTIVE:To conduct a meta-analysis of studies that assessed the association of tea consumption and the risk of type 2 diabetes. RESEARCH DESIGN AND METHODS:We performed a systematic literature search through November 2008 in PUBMED, MEDLINE, EMBASE, and Cochrane Database of Systematic Reviews. The search was limited to Englishlanguage studies. Studies were excluded if they were type 1 diabetes, animal studies. Nine cohort studies were identified by two authors, and summary relative risks (RRs) were calculated using a random-effects model. RESULTS:We identified nine cohort studies, including 324,141 participants and 11,400 incident cases of type 2 diabetes with follow-up ranging from 5 to 18 years. The summary adjusted RR did not show that tea consumption was associated with a reduced type 2 diabetes risk (RR, 0.96; 95% confidence interval (CI), 0.92-1.01). Evidence from the results of our stratified analyses revealed that tea consumption ≥4 cups per day (RR, 0.8; 95% CI, 0.7-0.93) might play a role in the prevention of type 2 diabetes. However, no statistically significant association was observed for sex and the follow-up durations stratified between tea consumption and type 2 diabetes. CONCLUSIONS:This meta-analysis indicates that tea consumption ≥4 cups per day may lower the risk of type 2 diabetes.KEY WORDS: type 2 diabetes; tea; meta-analysis.

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“…Some of these studies did not find any associations [27,29,30,32], while one study observed an inverse relation for both coffee and black tea consumption and type 2 diabetes but not for green tea [32]. Another study found an association only for green tea, not for black or oolong tea [6].…”

Section: Discussionmentioning

confidence: 96%

Coffee and tea consumption and risk of type 2 diabetes

et al. 2009

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Aims/hypothesis The aim of this study was to examine the association of consumption of coffee and tea, separately and in total, with risk of type 2 diabetes and which factors mediate these relations. Methods This research was conducted as part of the Dutch Contribution to the European Prospective Investigation into Cancer and Nutrition, which involves a prospective cohort of 40,011 participants with a mean follow-up of 10 years. A validated food-frequency questionnaire was used to assess coffee and tea consumption and other lifestyle and dietary factors. The main outcome was verified incidence of type 2 diabetes. Blood pressure, caffeine, magnesium and potassium were examined as possible mediating factors. Results During follow-up, 918 incident cases of type 2 diabetes were documented. After adjustment for potential confounders, coffee and tea consumption were both inversely associated with type 2 diabetes, with hazard ratios of 0.77 (95% CI 0.63-0.95) for 4.1-6.0 cups of coffee per day (p for trend=0.033) and 0.63 (95% CI: 0.47-0.86) for >5.0 cups of tea per day (p for trend=0.002). Total daily consumption of at least three cups of coffee and/or tea reduced the risk of type 2 diabetes by approximately 42%. Adjusting for blood pressure, magnesium, potassium and caffeine did not attenuate the associations. Conclusions/interpretation Drinking coffee or tea is associated with a lowered risk of type 2 diabetes, which cannot be explained by magnesium, potassium, caffeine or blood pressure effects. Total consumption of at least three cups of coffee or tea per day may lower the risk of type 2 diabetes.

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Coffee, tea, and incident type 2 diabetes: the Singapore Chinese Health Study

Abstract: Regular consumption of coffee and potentially black tea, but not green tea, is associated with lower risk of type 2 diabetes in Asian men and women in Singapore.

Cited by 167 publications

References 52 publications

Association of “Elevated Blood Pressure” and “Stage 1 Hypertension” With Cardiovascular Mortality Among an Asian Population

Association of “Elevated Blood Pressure” and “Stage 1 Hypertension” With Cardiovascular Mortality Among an Asian Population

Tea Consumption and Risk of Type 2 Diabetes: A Meta-Analysis of Cohort Studies

Coffee and tea consumption and risk of type 2 diabetes

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