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Green Tea, Coffee Intake Linked to Reduced Mortality in T2DM

THURSDAY, Oct. 22, 2020 -- For patients with type 2 diabetes, consumption of green tea and coffee is associated with reduced all-cause mortality, according to a study published online Oct. 20 in BMJ Open Diabetes Research & Care.

Yuji Komorita, M.D., Ph.D., from Kyushu University in Fukuoka, Japan, and colleagues conducted a prospective investigation to examine the impact of consuming green tea and coffee on mortality among 4,923 patients with type 2 diabetes from the Fukuoka Diabetes Registry.

The researchers note that 309 participants died during the follow-up period. There was a reduction seen in all-cause mortality with consumption of green tea, coffee, and a combination. For green tea consumption, multivariable-adjusted hazard ratios compared with none (referent) were 0.85 (95 percent confidence interval, 0.60 to 1.22), 0.73 (0.51 to 1.03), and 0.60 (0.42 to 0.85) for no more than one, two to three, and at least four cups/day, respectively (P trend, 0.002). For coffee, the multivariable-adjusted hazard ratios were 1.0 (referent), 0.88 (0.66 to 1.18), 0.81 (0.58 to 1.13), and 0.59 (0.42 to 0.82) for none, less than one, one, and at least two cups/day, respectively (P trend, 0.002). For the combination, the multivariable-adjusted hazard ratios were 0.49 (0.24 to 0.99), 0.42 (0.20 to 0.88), and 0.37 (0.18 to 0.77) for two to three cups green tea with at least two cups coffee, at least four cups green tea with one cup coffee, and at least four cups of green tea with at least two cups coffee per day, respectively.

"Our results suggest that consuming green tea and coffee may have beneficial effects on the longevity of Japanese people with type 2 diabetes," the authors write.

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Posted: October 2020

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