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Is There a Dose-Response Relationship between Tea Consumption and All-Cause, CVD, and Cancer Mortality?
Yi Yan1, Xuemei Sui2, Bin Yao3
1a Sports Science College, Beijing Sport University , Beijing , CHINA.
Journal of the American College of Nutrition
|May 31, 2017
Summary
This study found weak or no associations between regular tea consumption and mortality from all causes, cardiovascular disease, or cancer in American adults. Further research is needed to clarify tea's health impacts.
Area of Science:
- Epidemiology
- Nutritional Science
- Public Health
Background:
- Population-level changes in tea consumption can significantly impact public health.
- The health benefits of tea intake among Americans remain inconclusive.
Purpose of the Study:
- To investigate the association between tea consumption and mortality from all causes, cardiovascular disease (CVD), and cancer.
- Study conducted within the Aerobics Center Longitudinal study (ACLS) cohort.
Main Methods:
- 11,808 participants (aged 20-82) initially free of CVD and cancer were followed for mortality.
- Baseline tea consumption (cups/day) was self-reported.
- Cox proportional hazard models analyzed mortality outcomes over a median follow-up of 16 years.
Main Results:
- Tea drinkers showed a survival advantage (P=0.017), but multivariate analyses revealed no significant linear trend in all-cause mortality with increasing tea intake.
- Multivariate hazard ratios for CVD mortality and cancer mortality did not show significant associations with tea consumption levels.
- Specific hazard ratios for all-cause mortality ranged from 0.95 to 0.98 across different weekly tea consumption groups.
Conclusions:
- Weak or null relationships were observed between tea consumption and mortality due to all causes, cardiovascular disease, or cancer in the ACLS cohort.
- The findings suggest limited impact of tea consumption on major mortality outcomes in this American population.
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