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FMB
Incidence and prevalence
T1
T2
Individuals
Point Prevalence:-
total number of
existing cases
at a given time point
Period Prevalence:-
total number of
cases
over a given time period
Prevalence Rate = Point Prevalence / #at risk at time point
Incidence:-
total number of
new cases
over a particular time period
Incidence Rate = Incidence / #at risk during the period
If incidence and duration are constant:- Prevalence = incidence X duration
Time