I have posted studies on coffee and tea as a way to prevent diabetes based on single study results. Now comes a metaanalysis which compiles all data from different studies to see if there are trends toaward prevention. This new metaanalysis was published in Archives of Internal Medicine this year:
Background Coffee consumption has been reported to be inversely associated with risk of type 2 diabetes mellitus. 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.
Methods Relevant studies were identified through search engines using a combined text word and MeSH (Medical Subject Headings) search strategy. Prospective studies that reported an estimate of the association between coffee, decaffeinated coffee, or tea with incident diabetes between 1966 and July 2009.
Results Data from 18 studies with information on 457 922 participants reported on the association between coffee consumption and diabetes. Six (N = 225 516) and 7 studies (N = 286 701) also reported estimates of the association between decaffeinated coffee and tea with diabetes, respectively. We found an inverse log-linear relationship between coffee consumption and subsequent risk of diabetes such that every additional cup of coffee consumed in a day was associated with a 7% reduction in the excess risk of diabetes relative risk, 0.93 [95% confidence interval, 0.91-0.95]) after adjustment for potential confounders.
Conclusions Owing to the presence of small-study bias, our results may represent an overestimate of the true magnitude of the association. Similar significant and inverse associations were observed with decaffeinated coffee and tea and risk of incident diabetes. High intakes of coffee, decaffeinated coffee, and tea are associated with reduced risk of diabetes. The putative protective effects of these beverages warrant further investigation in randomized trials.
This study hypothesizes what we believe is a true association to the protective effect of coffee and tea in developing diabetes.
What is significant is the fact that so far no untoward problems have been encountered with drinking coffee except a benefit to preventing diabetes which may have a great implication to those at risk of the disease.
But dont forget…lifestyle change should continue to be the priority in the heirarchy of prevention. Coffee is just an add on….
I will definitely continue to enjoy my cup of coffee every morning and another cup in the afternoon daily. Decaf at night is tempting.