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Influence of anti‐HBc seropositivity on the risk of hepatocellular carcinoma in HCV‐infected patients after adjusting for confounding factors
Author(s) -
Ohki T.,
Tateishi R.,
Goto E.,
Sato T.,
Masuzaki R.,
Imamura J.,
Goto T.,
Kanai F.,
Kato N.,
Shiina S.,
Yoshida H.,
Kawabe T.,
Omata M.
Publication year - 2010
Publication title -
journal of viral hepatitis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.329
H-Index - 100
eISSN - 1365-2893
pISSN - 1352-0504
DOI - 10.1111/j.1365-2893.2009.01152.x
Subject(s) - medicine , hepatocellular carcinoma , incidence (geometry) , cumulative incidence , proportional hazards model , gastroenterology , hazard ratio , confounding , multivariate analysis , hepatitis c virus , statistical significance , hepatitis b virus , immunology , virus , cohort , confidence interval , physics , optics
Summary. It is controversial whether past hepatitis B virus infection constitutes an additional risk of hepatocellular carcinoma (HCC) among patients with hepatitis C virus (HCV). The incidence of HCC between 1994 and 2004 was analysed among 1262 patients who were only positive for HCV. The cumulative incidence of HCC was assessed by Kaplan–Meier analysis and the difference between two groups was assessed by the log‐rank test. The effect of anti‐HBc positivity on the risk of HCC was assessed with multivariate Cox proportional analysis. Anti‐HBc was positive in 522 (41.4%) patients. The proportion of male patients (56.7 vs 46.8%, P < 0.001) and mean age (60.8 vs 56.9 years, P < 0.001) were significantly higher in the anti‐HBc positive group. HCC developed in 339 patients (mean follow‐up 7.0 years), with cumulative incidence rates at 3, 5 and 10 years of 12.7, 24.5 and 41.9% in the anti‐HBc positive group and 10.6, 17.7 and 33.4% in the negative group, respectively ( P = 0.005). However, anti‐HBc seropositivity did not reach statistical significance in multivariate analysis including age and gender (hazard ratio, 1.06; 95% CI, 0.85–1.31; P = 0.63). Anti‐HBc positivity and HCC incidence were confounded by male gender and older age.