As part of an outbreak investigation linked to a gathering as part of a Universi
ID: 136305 • Letter: A
Question
As part of an outbreak investigation linked to a gathering as part of a University Homecoming, a questionnaire was administered to the persons who attended the social event at an University Homecoming. Information to identify cases of gastrointestinal illness during the week following the event and food consumption during the event was collected from 105 participants out of approximate 350 total participants. The two-by-two table shown below summarizes the relation between consumption of potato salad and gastrointestinal illness Total 90 15 105 Potato Salad Well Yes 57 0 12 Total 60 45 What percent of the cases of this illness among University Homecoming attendees was due to the consumption of potato salad? A.68.4% B.65.0% C.57.1% D.Cannot be calculatedExplanation / Answer
Among the samples collected from 105 participants, 90 participants consumed potato salad.
From these participants, only 57 people were ill due to consumption of potato salad.
The percent of attendees with illness cases due to consumption of potato salad
100 x 57 / 90 = 65%
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