The lecture Measures of Association: Attributable Risk and Odds Ratio by Raywat Deonandan, PhD is from the course Measures of Association. It contains the following chapters:
There is a diarrhea outbreak at a picnic of 100 people. You investigate and find that 60 people got diarrhea and 40 did not. Of the diarrhea cases, 42 had eaten the potato salad. Of the 40 people without diarrhea, 15 had eaten the potato salad. Compute the odds ratio of the association between eating potato salad and getting diarrhea, and make a conclusion about whether the salad was the likely cause of diarrhea.
There is a diarrhea outbreak at a picnic of 100 people. You investigate and find that 60 people got diarrhea and 40 did not. Of the diarrhea cases, 42 had eaten the potato salad. Of the 40 people without diarrhea, 15 had eaten the potato salad. Compute the odds ratio of the association between eating potato salad and getting diarrhea, and make a conclusion about whether the salad was the likely cause of diarrhea ... if you compute the odds ratio of the relationship between potato salad and diarrhea, would this be a good approximation of the relative risk? Why or why not?
True or false: Relative risks can be computed for casecontrol studies.
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