Calculate the prevalence if incidence is 2 cases per 1000 population oer 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 population
Answer is A. the relationship between incidence and prevalence can be calculated as,prevalence =incidence*mean duration ,here in this case it equals 2*4 that is 8 cases per 1000 population. ref:park&;s textbook of preventive and social medicine,22nd edition,pg no 58