A Study Assessed the Association Between a New Vaccine and Traveler's

A study assessed the association between a new vaccine and traveler's diarrhea (TD) .  Researchers selected a random sample of people who intended to travel to regions where they were at increased risk for TD and who had received the new vaccine and another independent random sample of people who intended to travel to the same regions and who had not received the new vaccine.  These 2 samples of travelers were assessed for the occurrence of TD during the trip and for 7 days after returning home.  Which of the following measures of association are the investigators most likely to report?

A) Incidence
B) Median survival time
C) Odds ratio
D) Prevalence
E) Relative risk

Correct Answer:

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