Study Design Quiz

 

 

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1. You may remember that three years ago there was a multistate outbreak of illnesses caused by a specific and unusual strain of Listeria monocytogenes. As part of the investigation of this outbreak, CDC workers checked the food histories of 20 patients infected with the outbreak strain and compared them with the food histories of 20 patients infected with other Listeria strains. This study design is best described as which one of the following:
Analytical, experimental
Analytical, observational, case-control
Analytical, observational, cohort
Descriptive

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