We studied on 85 patients with Acute B Hepatitis (ABH) on process of markers of Hepatitis B virus (HBV) after recovering 2 years. The results showed that the rate of chronic HBsAg carriers: not fever before jaundice; long lasting mild pain in liver; nausea and vomit before jaundice. High level of SGOT and SGPT is under 10 times and high level of Bilirubin is under 5 times compared with normal index; high level of T lymphocytes cells is mild; HBeAg positive when entering hospital and long lasting positive
Hepatitis B ; Epidemiologic Methods

Hepatitis B is common disease in the world. There were 350 millions persons who carry the chronic hepatitis B virus. The hepatitis B may cause the chronic hepatitis, cirrhosis and primary liver cancer. The hepatitis B virus transmitted mainly via blood and drug addiction. The virus also transmitted from mother to their children or by intercourse. The hepatitis B virus included 2 major types with the clinical and para-clinical features in 3 phases.
Hepatitis B ; Epidemiologic Methods

Epidemiologic Methods ; Spatial Analysis

Epidemiologic Methods ; Models, Statistical

Epidemiologic Methods ; Translational Medical Research

Population attributable fraction (PAF) is an important public health parameter that is familiar to epidemiologists. The calculation of PAF is frequently based on the relative risk (RR) of a risk factor for a certain disease and the prevalence of exposure to the risk factor in the total population (Pe). We introduce here the method for making a nomogram linking PAF to RR and Pe. The nomogram will be very handy for public health professionals in estimating PAF quickly and accurately when information on RR and Pe is available.
Epidemiologic Methods ; Humans ; Risk Factors

By monitoring the clinical and epidemiological development and prevention of SARS outbreak, the author initially informed some remarks: 1 month after outbreak, SARS just occurred in individuals who were close related with the initial sources of infection from hospitals. Not detect outbreak in community
Severe Acute Respiratory Syndrome ; Epidemiologic Methods ; Epidemiologic Studies ; epidemiology

Air pollution epidemiologic studies are intrinsically difficult because the expected effect size at general environmental levels is small, exposure and misclassification of exposure are common, and exposure is not selective to a specific pollutant. In this review paper, epidemiologic study designs and analytic methods are described, and two nationwide projects on air pollution epidemiology are introduced. This paper also demonstrates that possible confounding issues in time-series analysis can be resolved and the impact on the use of data from ambient monitoring stations may not be critical. In this paper we provide a basic understanding of the types of air pollution epidemiologic study designs that be subdivided by the mode of air pollution effects on human health (acute or chronic). With the improvements in the area of air pollution epidemiologic studies, we should emphasize that elaborate models and statistical techniques cannot compensate for inadequate study design or poor data collection.
Air Pollution* ; Data Collection ; Epidemiologic Methods* ; Epidemiologic Studies ; Epidemiology ; Humans

Academic Dissertations as Topic ; Epidemiologic Methods ; Forecasting

Epidemiologic Methods ; Meta-Analysis as Topic ; Systems Analysis