A study aims to determine the incidence and prevalence of a particular disease within the local government area of Winchelsea.What factors would decrease the
Prevalence of the disease within this study catchment area?
A)Shorter duration of disease
B)Increasing case‐fatality from the disease
C)In‐migration of healthy people to the area
D)All of the above

Question

Quizplus · Accepted Answer

All of the above.Prevalence is a function of incidence (the rate at which new
cases of disease occur) and duration (how long an incident case continues to have the
disease).A and B both reduce the time people have the disease, while an increase in the
denominator without a change in the numerator (C) necessarily reduces the size of the
measure.

A Study Aims to Determine the Incidence and Prevalence of a Particular