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Is Coffee Consumption Associated With Lower Risk for Death?

What is the problem and what is known about it so far? Coffee is one of the most commonly consumed beverages in the world. Some studies have found that drinking more coffee is associated with a lower risk for death. These studies have included mostly white populations, and it is not clear whether this association is found in other groups. In addition, the relationship between coffee drinking and risk for death might differ according to the way coffee is prepared. Why did the researchers do these 2 studies? To determine whether the association between coffee consumption and risk for death differs according to ethnicity and cultural differences in how coffee is prepared. Who was studied? One of the studies included more than 185,000 adults from a range of ethnicities (African American, Latino, Native Hawaiian, Japanese American, and white). The other included more than 520,000 adults from 10 European countries, where people prepare coffee in different ways. How were the studies done? In both studies, the authors asked participants whether they drank coffee and how much, together with questions about other factors that influence a person's risk for health problems and death (for example, cigarette smoking, exercise, diabetes, and heart disease). They then followed the participants for years to see how many died and whether the death rate differed for those who had reported drinking more coffee. What did the researchers find? In both studies, people who reported drinking more coffee tended to live longer than those who reported drinking less. This was true in African Americans, Japanese Americans, Latinos, and whites. This finding did not differ among the 10 European countries. Rates of death from certain diseases seemed to be lower in those who reported drinking more coffee than in those who did not drink coffee, although the rate of death from ovarian cancer may have been higher. What were the limitations of the studies? These studies were based on a single report of how often the participants drank coffee, which may have changed over the years they were followed and might not have been accurate. In addition, although the researchers tried to account for this, people who say they drink a lot of coffee may differ from those who do not in other ways that may affect their health. What are the implications of the studies? Although drinking coffee cannot be recommended as being good for your health on the basis of these kinds of studies, the studies do suggest that for many people, no long-term harm will result from drinking coffee.