Monthly Archives: May 2012

Types of epidemiological Studies

Broadly epidemiological studies may be classified into two broad types, depending upon the type of exposure:- Observational (non-experimental) studies Experimental studies Observational studies Observational studies allow nature to take its own course, the investigator observe, measure but does not intervene where the researcher has no control over the exposure. The observational studies, which comprise the …

Exposure in epidemiology

The condition of being subjected to something, as to infectious agents, extremes of weather, or radiation, which may have a harmful effect. In case of communicable disease: Negative exposure – Consumption of polluted water causes disease Positive exposure – Consumption of safe water does not causes disease In non-communicable disease: Smoking is a risk factor …

Types, uses and features of descriptive studies

Types of descriptive studies Case series studies Community diagnosis or need assessment Descriptive cross-sectional studies Ecological descriptive studies Epidemiological description of disease occurrence   Use of descriptive Study To measure incidence To measure Prevalence To generate hypothesis The essential Features of descriptive studies are: To describe present or past characteristics of persons with a particular …