Epidemiological Study Designs c.1. Which of the following health outcomes could be studied using a cross-sectional study design? Choose all that apply and explain you answer. (5 pts) a) The prevalence of diabetes among adults in the Philippines in 2014 b) The prevalence of diabetes among all patients seen at a particular health clinic on one day in 2014 c) The number of new cases of diabetes diagnosed among at risk adults in the Philippines in 2014 d) The number of people in a population with diabetes who are obese and the number of people in a population with diabetes who are not obese, in the Philippines in 2014 c.2. Researchers are studying HIV prevalence using a cross-sectional study design. Which of the following factors may affect the researchers' assessment of HIV prevalence in their study population? Choose all that apply and explain your answer. (5 pts) a) Changes in HIV treatment b) Changes in HIV virulence (HIV virulence refers to the ability of the virus to cause disease) c) Population changes (e.g. migration) due to HIV infection, for example people who leave their community to live closer to physicians specialized in treating HIV d) Other factors which may affect survival of HIV-infected persons (e.g. changes in healthcare practices) e) Changes in HIV diagnostics () Changes in HIV awareness and education G.3. A cohort of 3,400 people followed for 10 years, of whom 1,600 were exposed to a chemical and another 1,800 who were not exposed. As the outcome, the incidence of cases of myeloid leukemia was measured. In the exposed group there were 100 cases and in the group without product exposure (25) cases in 10 years (prospective cohort shirlvl fin nal a. Prepare a contingency table b. Compute and interpret the following: b.1 Cumulative incidence b.2 Cl exposed and unexposed b.3 Relative risk b.4 Attributable risk b.5 Attributable risk among the exposed