Computation assignment - Odds Ratio and Relative Risks A total of 520 study subjects were enrolled in a study to examine association between tea drinking and heart disease. Be sure to include your formulas (show your work)! Heart disease No heart disease Tea drinkers A 30 250 Non-tea drinkers 40 200 1. How many total tea drinkers in the study? (0.5 point) 38 280 tea drinkers 2. What is the proportion of tea drinkers among those with heart disease? (use %) (1 point) 30 3. What is the prevalence of heart disease in this entire study population? (use %) (1 point) 10 520 4. Compute the relative risk of tea drinking and heart disease (1 point) a /gtb c / ctd 30 40 / 240 0 , 107 1644 280 $ 644 0 . 16 6 5. Compute the odds ratio of tea drinking and heart disease (1 point) 24 10/450 30/ 520 30/500 4 250/ 40. AD / BC 6. From the computation of relative risk and odds ratio, would you say tea drinking is a ... a) A risk factor of heart disease or 6:25 B b) A protective factor of heart disease (0.5 point)