All of the following statements regarding prevalence are true except-: (A) It is rate, (B) It is propoion, (C) Duration of disease effects prevalence, (D) Numerator is a pa of denominator
Answer is A. 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.