Final answer:
The cumulative incidence of the dependent variable per 100 people is 2.09%.
Step-by-step explanation:
The cumulative incidence of the dependent variable can be calculated by dividing the number of new cases by the population size and multiplying it by 100. In this case, there were an additional 209 cases and a study population of 100 people. So, the cumulative incidence would be (209/100) * 100 = 209%. However, the question asks for the cumulative incidence per 100 people, so we need to divide the cumulative incidence by 100. So, the cumulative incidence per 100 people would be 209/100 = 2.09%.