ADHEPTA Study: Adherence Questionnaire in Hepatitis C

Inclusion Criteria: * Ambulatory patient infected by HCV according to diagnosis criteria used en usual clinical practice. * Patient no treated previously and beginning a treatment for HCV. * Patient that signed the informed consent to participate in the study. * Group A: patient with HCV monoinfection. * Group B: patient with HCV and HCV co-infection (according to diagnosis criteria used en usual clinical practice). Exclusion Criteria: * Patient that received previous treatment for HCV. * Patient that is going to participate in a clinical trial Turing the HCV treatment period. * Patient with cognitive impairment or patient unable to understand and answer the auto-administered questionnaire. * Patient unable to read or write Spanish.