Objective:To evaluate the effect of chronic hepatitis B virus(HBV) infection on peak age of age-specific mortality of primary hepatocellular carcinoma(HCC).Methods:A cohort of 90234 subjects was assembled in Haimen City,Jiangsu in 1992.At co-hort entry,HBsAg(+) was an indicator of HBV infection,and those tested HBsAg(+) twice within 6 months were identified as chronic HBV infection.There were 14338 HBsAg(+) and 75896 HBsAg(-) subjects in the cohort respectively.The vital status of each cohort member was fol...