Prevalence and incidence-what does each one mean? How might they vary? What could influence the incidence...
Prevalence and incidence-what does each one mean? How might they vary? What could influence the incidence and prevalence rates? Which one measures the burden of disease and which one is used to investigate causes/risk factors of disease?
Homework Answers
#. Prevalence rate - The number of cases of a disease (or other healthrelated state or event) arising in a defined population at a specified point in time [point prevalence] or over a period of time
Incidence definition :-
Incidence can be defined as the number of new cases of a disease arising in a given period of time in a defined population (Relative Risk; Incidence Rate)
#. Factors effecting prevalence :-
•In-mirgration of sick or healthy people in to the original population.
•Out migration of sick or healthy people from the population
#. Prevalence measures the burden of disease and incidence is used to investigate causes /risk factors of disease
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