What is Incidence Rate: September 2010

Ans. B: It represents the number of new cases in the Incidence propoion (also known as cumulative incidence) is the number of new cases within a specified time period divided by the size of the population initially at risk. For example, if a population initially contains 1,000 non-diseased persons and 28 develop a condition over two years of observation, the incidence propoion is 28 cases per 1,000 persons, i.e. 2.8%