Epidemiology and Biostatistics for Public Health Application I
Question 1
Controlled clinical trials enable researchers to:
test new drugs, new therapies, and new medical devices.
exercise control over who will receive an exposure.
identify definitive relationships between causes and effects.
All are correct.
Question 2
A major advantage of community trials is that they are able to:
control delivery of the intervention to many study units.
estimate directly the realistic impact of behavior change.
randomize subjects precisely to the study conditions.
All are correct.
Question 3
To assess clinical end points, investigators:
compare rates of disease.
compare rates of death.
compare rates of recovery.
All are correct.
Question 4
The purpose of randomization is to reduce error that results from:
the way in which the outcome is assessed.
subjects’ participation in the trial.