21. Principles of Disease
Characteristics of Infectious Disease
1:42 minutes
Problem 9.9a
Textbook Question
Textbook QuestionA(n) _______________________ groups the study populations by exposure versus nonexposure to a certain risk factor to see if either group develops the outcome in question.
a. experimental study
b. case report
c. cross-sectional study
d. correlation study
e. observational study
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