A Prospective,Observational Follow-up Study of Nucleoside Treated Patients With Chronic Hepatitis B (OCEAN Study)

Patients who treated with nucleoside analogs, and previously took part in the OSST,COST,Endeavor, Anchor NPGV studies, were included in the observational study after they finished. The patients entered the following two observation groups based on previous studies: Group A: formerly interferon group (including interferon alone or interferon combined with other drugs); Group B: formerly nucleoside analogue treatment group. Each group was followed for five years.All patients were followed up for physical examination (vital signs, whole body examination) and laboratory assessment (HBsAg quantification, HBeAg quantification, HBV DNA, HBV immunology marker, blood routine, blood biochemistry, alpha fetoprotein, Fibroscan, liver Doppler) in every six month.