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用人群流行病学资料和血浆硒检测，比较了江苏省句容县茅山茶区与启东县非茶区男性肝癌死亡率与饮绿茶的关系。结果显示，饮茶率、饮茶量均较高的茅山，其男性肝癌死亡率明显低于启东，趋势性Ｘ２检验有极显著（Ｐ＜０．０１）的意义，但需在饮茶量相对较大时（＞３０ｇ／周）才有显著的保护作用，其ＲＲ值为０．１２。分别调整吸烟、饮酒因素的作用后，在茅山产茶区仍可看出常饮绿茶有显著降低肝癌死亡率的作用，趋势性Ｘ２值分别为８．８９（Ｐ＜０．０１）和５．４６（Ｐ＜０．０５），而在非产茶的启东，因饮茶量较少，绿茶的保护作用则不明显。此外，两地人群血浆抗癌成份硒水平的分析结果也表明，饮茶量大小与血浆硒成平行关系，以肝癌低发的句客人群平均血浆硒（１１．１μｇ／ｄ１）明显高于启东（５．７μｇ／ｄ１）。
Using population epidemiological data and plasma selenium testing, the relationship between mortality of male liver cancer and drinking green tea in Maoshan tea region of Qirong County and Qidong County in Jiangsu Province was compared. The results showed that the mortality rate of male liver cancer was significantly lower in Maoshan than in Qidong, and the trend of X2 test was extremely significant (P<0.01). However, the amount of tea consumed was relatively high. Larger (>30 g/week) had significant protection with an RR of 0.12. After adjusting the effects of smoking and drinking, the tea drinking in Changsan can still significantly reduce the mortality of liver cancer, and the trend X2 values are 8.89 (P<0.01) and 5. 46 (P<0.05), but in the non-producing Qidong tea, the protective effect of green tea was not obvious due to less tea consumption. In addition, the selenium levels of plasma anticancer components in the two populations also showed that the amount of tea drinking was parallel to plasma selenium, and the mean plasma selenium (11.1μg/day 1) was significantly higher in the low-risk group of liver cancer patients. Qidong (5.7μg/d1).