An Intervention Trial with Tea on High Risk Population of Primary Liver Cancer in Qidong

An intervention trial was conducted in order to elucidate the preventive effect of teaon the occurrence of primary liver cancer(PLC) in high risk population in Qidong county.The results showed that, in the 10 monthes observation period, the incidence rate of PLCwas 15 percent (12/80) in intervation group, and 14.1 percent (11/78) in placebo controlgroup. No significant difference was found between the two groups. After intervention,the changes of some biochemical markers such as AFP, ALT, AKP, Υ-GT and hepatitis Bvirus marders had no statistical difference between tea intervention group and controlgroup. The study suggested that tea had no preventive effect on the development of PLCin selected special high risk population.