Question: 30. Consider a hypothetical case-control study conducted for an at-risk period of one year. Imagine that there was 100% completion of informed consent materials for

30. Consider a hypothetical case-control study conducted for an at-risk period of one year. Imagine that there was 100% completion of informed consent materials for all eligible invited subjects. Further assume that there is no missing data, and that controls were sampled from non-cases at the end of follow-up. Table 6 shows the data that would be obtained from this hypothetical case-control study. Using Table 6, calculate the odds ratio for this case-control study and explain briefly whether it is a good estimate of the cohort risk ratio. Table 6. Hypothetical Study Cases Controls Total Exposed 230 370 600 Unexposed 370 230 600 Total 600 600 1200

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