Green Tea Linked to Reduced Cardiovascular Mortality

Consumption has no impact on cancer risk

TUESDAY, Sept. 12 (HealthDay News) -- Consumption of green tea is associated with reduced risk of death from all causes and from cardiovascular disease in Japanese adults but does not confer any benefits in terms of reduced risk of death from cancer, according to a study published in the Sept. 13 issue of the Journal of the American Medical Association.

Shinichi Kuriyama, M.D., Ph.D., of the Tohoku University of Public Policy, Sendai, Japan, and colleagues followed a cohort of 40,530 Japanese adults for up to 11 years for all-cause mortality and for up to seven years for specific cause mortality. The cohort comprised adults aged 40 to 79 years with no history of stroke, coronary heart disease or cancer at baseline.

During the course of the study, 4,209 subjects died, including 892 due to cardiovascular disease and 1,134 due to cancer. There was an inverse association between consumption of green tea and all-cause mortality, as well as mortality from cardiovascular causes, and the association was more pronounced in women. The strongest inverse association was for stroke mortality.

The authors noted that the higher incidence of smoking among men may explain why they appeared to gain less benefit from drinking green tea as it was impossible to eliminate the effects of residual confounding. "Clinical trials are ultimately necessary to confirm the protective effect of green tea on mortality," they wrote.

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