[Factors associated with severe evolutive forms of chronic infection with hepatitis C virus].

To assess the factors associated with the development of moderate and severe fibrosis, the medical records of 426 patients with chronic hepatitis C virus infection attended at the Infectious and Parasitic Diseases Clinic of the University of São Paulo Faculty of Medicine from January 1 to December 31, 2000 were reviewed. Of the patients included in the study, 56.3% were male and 43.