[An epidemiologic study on the etiology of primary hepatocellular carcinoma in Shaanxi]

The result of a matched case-control study on 110 cases of primary hepatocellular carcinoma (PHC) in Shaanxi is reported. It was shown that HBV was closely associated with PHC. Besides, psychosocial and genetics factors could be risk factors. Vegetables and fruits might be protective factors. Synergistic action between HBV and inheritance and foods was observed. Logistic regression analysis showed that HBV infection and negative events were possibly the risk factors, while vegetables and fruits were probably the protective factors.