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Journal Article
Research Support, Non-U.S. Gov't
Hepatitis B virus, cigarette smoking and alcohol consumption in the development of hepatocellular carcinoma: a case-control study in Fukuoka, Japan.
The roles of the hepatitis B virus (HBV), cigarette smoking and alcohol consumption in the etiology of hepatocellular carcinoma (HCC) were examined in a case-control study involving 204 patients with HCC and 410 control subjects in Fukuoka prefecture, where HCC risk is among the highest in Japan. Information on smoking and drinking habits was obtained by a detailed interview survey, and the results were analyzed in conjunction with serum hepatitis B surface antigen (HBsAg) status after adjustment for sex, age and other possible confounding factors. Individuals positive for serum HBsAg showed a relative risk (RR) for HCC of 13.8 (95% confidence interval, Cl 5.9 to 32.5), whereas heavy drinkers experienced about a 2-fold risk increase compared with non-drinkers. Light or moderate drinkers, however, demonstrated RRs near the unity. Some risk excess was observed among ex-smokers (RR = 1.5, 95% CI 0.8 to 2.8) and current smokers (RR = 1.5, 0.8 to 2.7) compared with non-smokers, but without evidence for a dose-response relationship in terms of pack-years. Analysis among HBsAg-negative subjects revealed similar non-significant association with smoking, and there was no clear interaction between alcohol and cigarette consumption on HCC risk. Other significant risk factors included positive histories of blood transfusion (RR = 3.7, 2.2 to 6.3) and familiar liver disease (RR = 2.6, 1.6 to 4.2). Attributable risk calculations suggest that chronic HBV infection and heavy drinking may account for 17% and 13% of HCC occurrence, respectively, in this high risk area. The association of cigarette smoking with HCC was not evident in our study.
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