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Identifying study design and making contingency tables You enroll 4,000 women in 1990 and follow them for 10 years. Liver cirrhosis is your outcome; none of the women had liver cirrhosis at the start of the study. Of those women who drank alcohol daily (n=2,200) in 1990, 200 were diagnosed with liver cirrhosis during the 10-year period. Of those who abstained from alcohol in 1990, 75 had liver cirrhosis diagnosed during the 10-year period. Nobody died or was lost to follow up during the study period. • Fill in the blanks for the exposure and disease to write the research question for this study: Is there an association between • Could we conduct this study as a randomized control trial? Why or why not? What type of study design is this? Be specific. How do you know? • Complete the standard epidemiology 2×2 table (Sample provided below). Include the numbers and the proper headings. (Use the table kon at the top of your Reply post to make your table.) 2×2 table Liver cirrhosis No Liver cirrhosis Drank alcohol daily and Did not drink 4000 • Calculate the relative risk. Show formulas and work. • Articulate your findings about the association in a sentence. • What are some public health implications of this study? • How did you find this activity/exercise? Are you finally starting to get the hang of epidemiology?
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