A highly publicized study in the news this week has been used in a slew of articles to suggest that drinking several cups of coffee a day will extend your life.
Coffee, caffeinated or decaffeinated, may help extend the lives of people who drink it daily, a U.S. study found.
Men who drank 2 to 3 cups a day had a 10 per cent chance of outliving those who drank no coffee, while women had a 13 per cent advantage, according to research published Wednesday in the New England Journal of Medicine. Toronto Star
To me, this is a huge misinterpretation of the observational study (N Engl J Med), which appears to have merely correlated self-proclaimed coffee drinkers with living longer. We know of course that correlation does not imply causation, and the relationship could be due to a number of things, such as the possible fact that coffee drinkers tend to wake up earlier and have more active days, which might improve their overall health.
Is there anything in this or any other study to actually suggest a causal relationship between drinking coffee and living longer, or is this being blown out of proportion by popular media?