Drinking coffee may promote longevity
No association exists between regular coffee consumption and an increased mortality rate in either men or women, according to a recent study.
The relative risks (RRs) for all-cause mortality in men across coffee intake categories (<1 cup per month, 1 cup per month to 4 cups per week, 5 to 7 cups per week, 2 to 3 cups per day, 4 to 5 cups per day, and ≥6 cups per day) were 1.0, 1.07 (95 percent CI, 0.99 to 1.16), 1.02 (0.95 to 1.11), 0.97 (0.89 to 1.05), 0.93 (0.81 to 1.07) and 0.80 (0.62 to 1.04), respectively (p=0.008 for trend), after adjustment for age, smoking, and other cardiovascular disease (CVD) and cancer risk factors.
The RRs in women were 1.0, 0.98 (0.91 to 1.05), 0.93 (0.87 to 0.98), 0.82 (0.77 to 0.87), 0.74 (0.68 to 0.81) and 0.83 (0.73 to 0.95), respectively (p<0.001 for trend).
The inverse association was independent of caffeine consumption and was primarily due to a moderately reduced risk for CVD mortality. On the other hand, after adjustment for potential confounders, no statistically significant association was found between coffee intake and risk for cancer mortality.
In addition, decaffeinated coffee consumption was associated with a small reduction in all-cause and CVD mortality.
Using sex-specific Cox proportional hazard models, researchers investigated the association between coffee consumption and mortality during 18 years of follow-up in men (n=41,736) and 24 years of follow-up in women (n=86,214).
The study was limited by self-reporting of coffee consumption, which might have contributed to measurement error.
“The possibility of a modest benefit of coffee consumption on all-cause and CVD mortality needs to be further investigated,” researchers said.