Which of the following increases the prevalence ofthe diseaseaEUR'
Increase in duration of disease [Ref: Park 20/e, p 58 (19/e, p 56, 57)J Prevalence refers "to all current cases (old + new) existing at a given point in time (point prevalence) or over a period of time (period prevalence) in a given population" It thus includes all the new cases, as well as those old persisting cases. It depends on 2 factors i. incidence of disease (I) ii.duration of disease (D) Thus, the longer the duration of disease, the greater its prevalence.
Immigration of healthy people
Increase in cure rates
Decrease in the number of new cases
Increase in duration of disease