Abstract
BackgroundStudies have observed an association between the ABO blood group and risk of certain malignancies. However, no studies of the association with hepatocellular carcinoma (HCC) risk are available. We conducted this hospital-based case-control study to examine the association with HCC in patients with chronic hepatitis B (CHB).MethodsFrom January 2004 to December 2008, a total of 6275 consecutive eligible patients with chronic hepatitis B virus (HBV) infection were recruited. 1105 of them were patients with HBV-related HCC and 5,170 patients were CHB without HCC. Multivariate logistic regression models were used to investigate the association between the ABO blood group and HCC risk.ResultsCompared with subjects with blood type O, the adjusted odds ratio (AOR) for the association of those with blood type A and HCC risk was 1.39 [95% confidence interval (CI), 1.05–1.83] after adjusting for age, sex, type 2 diabetes, cirrhosis, hepatitis B e antigen, and HBV DNA. The associations were only statistically significant [AOR (95%CI) = 1.56(1.14–2.13)] for men, for being hepatitis B e antigen positive [AOR (95%CI) = 4.92(2.83–8.57)], for those with cirrhosis [AOR (95%CI), 1.57(1.12–2.20)], and for those with HBV DNA≤105copies/mL [AOR (95%CI), 1.58(1.04–2.42)]. Stratified analysis by sex indicated that compared with those with blood type O, those with blood type B also had a significantly high risk of HCC among men, whereas, those with blood type AB or B had a low risk of HCC among women.ConclusionsThe ABO blood type was associated with the risk of HCC in Chinese patients with CHB. The association was gender-related.
Highlights
Hepatocellular carcinoma (HCC) is one of the few cancers with well-defined major risk factors, including chronic hepatitis B virus (HBV) and hepatitis C virus (HCV) infection, and cirrhosis due to many causes [1]
In China, a hyper-endemic area of HBV infection, nearly 80% of hepatocellular carcinoma (HCC) cases have been linked to chronic HBV infection, and approximately 60%–90% of these develop in patients with cirrhosis [3,4]
In patients with chronic HBV infection, HBV DNA level, viral genotype, and hepatitis B e antigen (HBeAg) status have been identified as risk factors for HCC [6,7,8]
Summary
Hepatocellular carcinoma (HCC) is one of the few cancers with well-defined major risk factors, including chronic hepatitis B virus (HBV) and hepatitis C virus (HCV) infection, and cirrhosis due to many causes [1]. Not all patients with these diseases will develop HCC Within these disease groups, there are other factors that indicate greater or lesser risk[2]. In patients with chronic HBV infection, HBV DNA level, viral genotype, and hepatitis B e antigen (HBeAg) status have been identified as risk factors for HCC [6,7,8]. No studies of the association with hepatocellular carcinoma (HCC) risk are available. We conducted this hospitalbased case-control study to examine the association with HCC in patients with chronic hepatitis B (CHB)
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