High intakes of coffee, decaffeinated coffee, and tea are associated with a reduced risk for type 2 diabetes
December 14, 2009 — High intakes of coffee, decaffeinated coffee, and tea are associated with a reduced risk for type 2 diabetes, according to the results of a meta-analysis reported in the December 14/28 issue of the Archives of Internal Medicine.
"Coffee consumption has been reported to be inversely associated with risk of type 2 diabetes mellitus," write Rachel Huxley, D.Phil, of the George Institute for International Health, University of Sydney in Sydney, Australia, and colleagues. "Similar associations have also been reported for decaffeinated coffee and tea. We report herein the findings of meta-analyses for the association between coffee, decaffeinated coffee, and tea consumption with risk of diabetes."
Using a combined text word and MeSH (Medical Subject Headings) search strategy, the investigators identified relevant studies through search engines. Inclusion criteria were prospective studies published between 1966 and July 2009 and reporting an estimate of the association between coffee, decaffeinated coffee, or tea with incident diabetes.
There were 18 studies, enrolling a total of 457,922 participants, reporting on the association between coffee consumption and diabetes. Of these, 6 (N = 225,516) also reported estimates of the association between decaffeinated coffee with diabetes, and 7 studies (N = 286,701) also reported estimates of the association between tea and diabetes.
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