You conducted a prospective cohort study of 3,000 individuals who you enrolled and administered a baseline questionnaire. all participants were followed for 5 years, until they experienced the outcome, or until they were lost to follow-up. during the course of follow-up, 125 individuals experienced a stroke and the remaining 2825 did not. based on questionnaire data obtained at baseline, 28% of those experiencing a stroke reported a history of heavy drinking. among those who did not experience a stroke, 20% reported they had a history of heavy drinking. briefly explain why the odds ratio (below) from the cohort study is similar to (or not similar to) the risk ratio (below) calculated from the same cohort. calculate odds ratio. incidence rate in exposed group incidence rate in unexposed group (al b) (bl d) axd bxc 49 x 2260 565 x 126 110740 71190 1.56 or calculate the rr risk (cumulative incidence) in exposed group risk (cumulative incidence) in unexposed group a/ (a+b) c/(c+d) 49/(49+565) 126/ (126+2260) 0.0798 0.0528 rr =