Calculate the prevalence if incidence is 2 cases per 1000 population per year and mean duration is 4 years-: (A) 8 cases per 1000 population, (B) 2 cases per 1000 population, (C) 0.5 cases per 1000 population, (D) 32 cases per 1000 pupulation
Answer is A. .prevalence is the product of incidence and mean duration ,that is 2* 4 per 1000 population.ref:park&;s textbook,ed22 ,pg no 57