Question

Incidence of a disease is 4 per 1000 of population with duration of 2 years. Calculate the prevalence?

• A. 8/1000
• B. 4/1000
• C. 2/1000
• D. 6/1000

Answer 1

The Correct Option is A

The incidence rate of a disease is a measure of the frequency with which new cases occur in a population during a specified period. Here, the incidence is given as 4 per 1000 population per year, and the duration of the disease is 2 years.

Prevalence is the total number of cases (both new and existing) in a population at a given time. It is related to incidence and duration as follows:

Prevalence = Incidence × Duration

Given the incidence rate is 4 per 1000 per year and the duration of the disease is 2 years, we can calculate the prevalence:

Prevalence = 4/1000/year × 2 years = 8/1000

Thus, the prevalence of the disease in the population is 8 per 1000.