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Here are five differences between incidence and prevalence in a table format:
incidence and prevalence
|Definition||The number of new cases of a disease in a population over a specific period of time||The total number of cases of a disease in a population at a specific point in time|
|Calculation||Number of new cases / size of population at risk x time period||Total number of cases / size of population at risk|
|Time frame||Typically measured over a defined time period, such as a year||Measured at a specific point in time or over a longer period|
|Focus||Focuses on new cases and risk of developing a disease||Focuses on existing cases of a disease|
|Used for||Used to understand the risk of developing a disease in a population and to identify risk factors||Used to understand the overall burden of disease in a population and to evaluate the effectiveness of prevention and treatment programs|