Spearman rank correlation analysis showed there were positive correlations between hepatitis B virus ( HBV ) - DNA levels and preoperative ALT ( r = 0.414 , P = 0.044 ) and AST ( r = 0.405 , P = 0.024 ) in 33 HBV-DNA positive patients , but there was no significant correlation between HBV - DNA levels or other preoperative liver function indicators .