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关于一种食品或一种环境因子和某一种疾病之间的关系，往往需要通过人群的流行病学调查来进行验证，下面则列一组关于茶和人体常见病流行病学调查的结果。据奥地利1994年报道，对1863名年龄25～64岁间的男性和女性公民的调查表明，饮茶多少与发生人体心血管疾病的危险性成负相
The relationship between a food or an environmental factor and a particular disease often needs to be verified by a population epidemiological survey. The following is a list of epidemiological findings about common diseases in tea and the human body. According to a report from Austria in 1994, a survey of 1,863 male and female citizens between the ages of 25 and 64 shows that drinking tea is negatively correlated with the risk of developing cardiovascular disease