RESULTS	At the end of 48 weeks with no treatment , all the parameters mentioned above in the PEG-IFN alpha-2a group were much better than those in the control group and they remained so , but they were different in the control group ( x2 = 11.943 , t = 3.439 , t = 6.111 , x2 = 9.930 , x2 = 9.522 , x2 = 7.920 , P < 0.01 ) .\