From the story here:
The apparent longevity boost was seen with instant, ground and decaffeinated, results that echo U.S. research. It’s the first large study to suggest a benefit even in people with genetic glitches affecting how their bodies use caffeine.
Overall, coffee drinkers were about 10 percent to 15 percent less likely to die than abstainers during a decade of follow-up. Differences by amount of coffee consumed and genetic variations were minimal.
