All of the following statements regarding prevalence are true except-
Ref:Parks 23rd edition pg 61. Prevalence is a propoion with numerator being a pa of denominator. Prevalence refers specifically to all current cases (old and new) existing at a given point in time, or over a period of time in a given population.
It is rate
It is propoion
Duration of disease effects prevalence
Numerator is a pa of denominator
Epidemiology