Goal of this study is to verify the impact of menopause on response to antiviral therapy for CHC and in determining more severe fibrosis in comparison with age-matched men. To achieve this goal a database of all the PEG IFN/Ribavirin patients treated in the GI Unit of the University of Modena and Reggio Emilia in the last 7 years will be set up. Demographic, clinical and biochemical data as well data regarding the reproductive history, time, type, length of estrogen deprivation and of hormone-replacement therapy will be collected.