绿茶预防肝癌的实验流行病学研究

An Epidelniologic Trial of Using Green Teato Prevent Liver Cancer

我们在广西某肝癌高发区开展口服绿茶叶粉压片以预防原发性肝癌的实验流行病学研究。经过５年多的随访观察，结果表明：实验组成员死于肝癌的危险度明显低于对照组，效果指数（ＥＩ）为２．３８，保护率（ＰＲ）为５７％，差异有显著性意义（Ｐ＜０．０１）．结果提示，对于已经长期暴露于肝癌危险因素的人群，采取某些非特异性的预防措施，仍然可以获得一定程度的保护。

An epidemiologic trial was per-formed in an area with very high incdence of prima-ry liver cancer(PLC)in Guangxi,China,to investi-gate whether green tea could be used to preventPLC,Result of following-up for more than 5 yearsshowed that PLC risk of the members in experimentgroup was obviously lower than that of controls,with effect index(EI)of 2.38 and protective rate(PR)of 57%,Dlfference was statistically signifi-cant,It was suggested that persons who had longterm exposed to PLC risk factors could,still be pro-tected to some extent by some measures belonging tounspecific prevention.