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Prospective study of coffee and tea consumption in relation to risk of type 2 diabetes mellitus among men and women: the Whitehall II study.
Br J Nutr 2008; 100(5):1046-53BJ

Abstract

At least fourteen cohort studies have documented an inverse association between coffee consumption and risk of type 2 diabetes. We examined the prospective association between coffee and tea consumption and the risk of type 2 diabetes mellitus among British men (n 4055) and women (n 1768) from the Whitehall II cohort. During 11.7 years follow-up there were a total of 387 incident cases of diabetes confirmed by self-report of doctor's diagnosis or glucose tolerance tests. Despite an inverse association between coffee intake and 2 h post-load glucose concentration at the baseline assessment, combined caffeinated and decaffeinated coffee (hazard ratio (HR) 0.80; 95 % CI 0.54, 1.18) or only decaffeinated coffee intake (HR 0.65; 95 % CI 0.36, 1.16) was not significantly associated with diabetes risk at follow-up after adjustment for possible confounders. There was an association between tea intake and diabetes (HR 0.66; 95 % CI 0.61, 1.22; P < 0.05) after adjustment for age, gender, ethnicity and social status, which was not robust to further adjustments. There was, however, an association between combined intake of tea and coffee (two or more cups per day of both beverage) and diabetes (HR 0.68; 95 % CI 0.46, 0.99; P < 0.05) after full adjustment. In conclusion, relatively moderate intake (more than three cups per day) of coffee and tea were not prospectively associated with incidence of type 2 diabetes although there was evidence of a combined effect. The limited range of exposure and beverage consumption according to socio-economic class may explain these conflicting findings.

Authors+Show Affiliations

Department of Epidemiology and Public Health, University College London, 1-19 Torrington Place, London WC1E 6BT, UK. m.hamer@ucl.ac.ukNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

18315891

Citation

Hamer, Mark, et al. "Prospective Study of Coffee and Tea Consumption in Relation to Risk of Type 2 Diabetes Mellitus Among Men and Women: the Whitehall II Study." The British Journal of Nutrition, vol. 100, no. 5, 2008, pp. 1046-53.
Hamer M, Witte DR, Mosdøl A, et al. Prospective study of coffee and tea consumption in relation to risk of type 2 diabetes mellitus among men and women: the Whitehall II study. Br J Nutr. 2008;100(5):1046-53.
Hamer, M., Witte, D. R., Mosdøl, A., Marmot, M. G., & Brunner, E. J. (2008). Prospective study of coffee and tea consumption in relation to risk of type 2 diabetes mellitus among men and women: the Whitehall II study. The British Journal of Nutrition, 100(5), pp. 1046-53. doi:10.1017/S0007114508944135.
Hamer M, et al. Prospective Study of Coffee and Tea Consumption in Relation to Risk of Type 2 Diabetes Mellitus Among Men and Women: the Whitehall II Study. Br J Nutr. 2008;100(5):1046-53. PubMed PMID: 18315891.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Prospective study of coffee and tea consumption in relation to risk of type 2 diabetes mellitus among men and women: the Whitehall II study. AU - Hamer,Mark, AU - Witte,Daniel R, AU - Mosdøl,Annhild, AU - Marmot,Michael G, AU - Brunner,Eric J, Y1 - 2008/03/04/ PY - 2008/3/5/pubmed PY - 2008/11/19/medline PY - 2008/3/5/entrez SP - 1046 EP - 53 JF - The British journal of nutrition JO - Br. J. Nutr. VL - 100 IS - 5 N2 - At least fourteen cohort studies have documented an inverse association between coffee consumption and risk of type 2 diabetes. We examined the prospective association between coffee and tea consumption and the risk of type 2 diabetes mellitus among British men (n 4055) and women (n 1768) from the Whitehall II cohort. During 11.7 years follow-up there were a total of 387 incident cases of diabetes confirmed by self-report of doctor's diagnosis or glucose tolerance tests. Despite an inverse association between coffee intake and 2 h post-load glucose concentration at the baseline assessment, combined caffeinated and decaffeinated coffee (hazard ratio (HR) 0.80; 95 % CI 0.54, 1.18) or only decaffeinated coffee intake (HR 0.65; 95 % CI 0.36, 1.16) was not significantly associated with diabetes risk at follow-up after adjustment for possible confounders. There was an association between tea intake and diabetes (HR 0.66; 95 % CI 0.61, 1.22; P < 0.05) after adjustment for age, gender, ethnicity and social status, which was not robust to further adjustments. There was, however, an association between combined intake of tea and coffee (two or more cups per day of both beverage) and diabetes (HR 0.68; 95 % CI 0.46, 0.99; P < 0.05) after full adjustment. In conclusion, relatively moderate intake (more than three cups per day) of coffee and tea were not prospectively associated with incidence of type 2 diabetes although there was evidence of a combined effect. The limited range of exposure and beverage consumption according to socio-economic class may explain these conflicting findings. SN - 1475-2662 UR - https://www.unboundmedicine.com/medline/citation/18315891/Prospective_study_of_coffee_and_tea_consumption_in_relation_to_risk_of_type_2_diabetes_mellitus_among_men_and_women:_the_Whitehall_II_study_ L2 - https://www.cambridge.org/core/product/identifier/S0007114508944135/type/journal_article DB - PRIME DP - Unbound Medicine ER -