Question: Suppose the incidence of diabetes mellitus type II among obese adults is 18% and the incidence of diabetes mellites type II in non-obese adults is 10%. You calculate the risk difference to be 8%. How do you interpret the risk difference? 1. Subjects who are obese are 8 time likely to have diabetes mellitus to non-obese people 2. Subjects who are obese has an additional 8 cases of diabetes mellitus per 100 people compared to non-obese 3. If everyone in the population was non- obese, the incidence of diabetes would decrease by 8% 4. All of the above