Study Design Type

Please complete the following optional assignment for up to 10 extra credit points that will be added to your overall assignment grade. Late assignments will not be accepted, under any circumstances. You are expected to complete this assignment without outside help. Answer the following questions and upload your answers by clicking on the assignment name. You must show all the steps in any calculations and write in complete sentences. 1) A 10-year long study has enrolled 1500 men and women who work for the New York MTA to study the association between prolonged exposure to noisy environments and the onset of hearing-loss. 2000 MTA administrative office workers were also enrolled as controls. Participants were chosen based on how many hours they are exposed to noisy environments (75 decibels or higher) and then followed in time to see if they develop hearing loss of any magnitude. After 10 years, they found that 47 of the office workers had developed hearing loss, and 158 of the workers in the noisy environment developed hearing loss. i) Based on the information given above, what type of study design was used? 2) What is the best measure of association used for this study design type? 3) Use the information above to complete a 2×2 contingency table with proper labels for disease status, exposure status and totals. Fill in all numbers (see lectures and textbook for examples) 4) Calculate the measure of association you indicated in question 2, showing all the steps. 5) Imagine you had to share the findings of this research with the workers, how would you explain your answer in part 4 so that it makes sense to them? (Use your lectures or textbook for examples) 6) If you had to choose a different study design, other than the one described here, which would you choose? Briefly explain what your study design would entail.

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