Which type of study is preferable when little is known about the health consequences of an exposure?
A) Cohort study
B) Ecological study
C) Case-control study
D) Cross-sectional study
Correct Answer:
Verified
Q18: Which of the following was a national
Q19: Which type of study compares the rates
Q20: Which type of variations in disease frequency
Q21: Epidemiologists have varying opinions about the usefulness
Q22: The epidemic curve of which of the
Q24: Investigators are usually confident that which type
Q25: In which type of study, cases serve
Q26: Which type of studies are fairly common
Q27: Which type of trials usually take many
Q28: Which phase of a clinical trial provides
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