A prophylactic trial is designed to:
A) compare rates of disease, death, and recovery in a population.
B) measure how well drugs produce improvement in a patient's illness.
C) evaluate the effectiveness of a substance used to prevent disease.
D) estimate the impact of exposure on the incidence of disease.
Correct Answer:
Verified
Q10: External validity is not connected with the
Q11: Controlled clinical trials enable researchers to:
A) test
Q12: In contrast to observational studies, intervention studies
Q13: To assess clinical end points, investigators:
A) compare
Q14: The Stanford Five-City Project, a major community
Q16: Surrogate endpoints for a clinical trial of
Q17: The purpose of a double-blind design in
Q18: Phase III clinical trials for a cancer
Q19: The purpose of randomization is to reduce
Q20: A major advantage of community trials is
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