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The lecture Odds Ratio – Attributable Risk and Odds Ratio (Measures of Association) by Raywat Deonandan, PhD is from the course Measures of Association.
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. Based on the prevalence of diarrhea, is the odds ratio a good approximation of the relative risk?
Which of the following studies utilizes the odds ratio as an estimate of relative risk?
At the start of a cohort study, the exposure is determined with the help of a questionnaire. During the study, there is no "loss to followup". At the end of the followup time, the number of cases is known and is divided into exposed and unexposed. The odds ratio (OR) is used as the association measure. Which statement best represent the choice of OR as the association measure?
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Good explanations with examples to help facilitate understanding. The presenter simplified some very complex measures.