Survey on case mix of viral hepatitis B in Tianjin City in 2005

Objective The present study was conducted to know the case mix of viral hepatitis B, use the survey results to predict the incidence and revise the reported incidence of hepatitis B. Methods Based on the number of cases with hepatitis B reported by epidemic status network in 2005, the stratified random sampling surveys with different proportion were taken at the beginning of each month according to last month's regional incidence. Cases in surveys all filled in the questionnaires of epidemiology of viral hepatitis B in Tianjin City. The data were put into the computers by Excel and analyzed by SPSS 11.5. Results The incidences of acute hepatitis, severe hepatitis, chronic hepatitis, cholestatic hepatitis, and cirrhosis due to hepatitis virus were 36.51%, 4.33%, 48.81%, 0.08%, and 10.27% respectively. The revised incidence of acute hepatitis was 19.05/lakh. Conclusion The revised incidence of acute hepatitis was far lower than the reported incidence of epidemic status. Cases with hepatitis B were mainly chronic ones. It was suggested that classification reporting of cases with acute and chronic hepatitis B should be strengthened in medical facilities.