EPI FINAL COWAN 2025 QUIZ QUESTIONS AND ANSWERS
Cohort Study is to risk ratio as:
Ecological fallacy is to cross-sectional study
genetics is to environment
case-control study is to odds ratio - CORRECT ANSWER✅✅✅case control study is to odds ratio
An example of active follow-up in cohort studies is:
A.Collection and maintenance of data by the federal government at the population level
B.A mailed survey to the participant requesting information
C.Information gathered from disease registries
D.Database containing outcome of interest collected by another organization - CORRECT
ANSWER✅✅✅B. A mailed survey to the participant requesting information
T/F: Cohort studies preserve the temporality of cause (exposure) happening before the effect (disease). -
CORRECT ANSWER✅✅✅True
T/F: A comparison group (ie- non exposed) should be used to correctly preform a cohort study. -
CORRECT ANSWER✅✅✅True
T/F: Population-based cohort studies permit investigations of exposures that are uncommon. - CORRECT
ANSWER✅✅✅False
T/F: Risk ratio is defined as the ratio of the offs of exposure among the diseased to the odds among the
non-diseased. - CORRECT ANSWER✅✅✅False
T/F: Randomized clinical trials enroll individual subjects and enable randomization of subjects to receive
and not to receive the intervention in a clinical setting. - CORRECT ANSWER✅✅✅True
, T/F: Treatment crossover refers to any change of treatment for a patient in a clinical trial that involves a
switch of study treatments. - CORRECT ANSWER✅✅✅True
T/F: Experimental designs discussed in this class include randomized controlled trials and community
trials. - CORRECT ANSWER✅✅✅True
In contrast to observational studies, experimental studies are best employed to:
A. Generate knowledge about the natural history of disease
B. Formulate strategies for prevention
C. Test efficacy of prevent or treatment measures
D. None of the above - CORRECT ANSWER✅✅✅C. Test the efficacy of prevention or treatment
measures
To assess clinical end points, investigators:
A. Compare rates of disease
B. Compare rates of death
C. Compare rates of recovery
D. All of the above - CORRECT ANSWER✅✅✅D. All of the above
The purpose of single-blinding study participants in clinical trials is to:
A. Reduce error that results from the way in which the outcome is assessed
B. Reduce error that results from subjects knowledge of their assignment to study conditions
C. Reduce error that results from non-random assignment to study conditions
D. None of the above - CORRECT ANSWER✅✅✅B. Reduce error that results from subject's
knowledge of their assignment to study conditions
Phase I of clinical trials for a cancer drug involve:
A. Initial testing in humans
B. Testing with different tumor types
C. Comparing survival rates for the new drug versus extant therapies
Cohort Study is to risk ratio as:
Ecological fallacy is to cross-sectional study
genetics is to environment
case-control study is to odds ratio - CORRECT ANSWER✅✅✅case control study is to odds ratio
An example of active follow-up in cohort studies is:
A.Collection and maintenance of data by the federal government at the population level
B.A mailed survey to the participant requesting information
C.Information gathered from disease registries
D.Database containing outcome of interest collected by another organization - CORRECT
ANSWER✅✅✅B. A mailed survey to the participant requesting information
T/F: Cohort studies preserve the temporality of cause (exposure) happening before the effect (disease). -
CORRECT ANSWER✅✅✅True
T/F: A comparison group (ie- non exposed) should be used to correctly preform a cohort study. -
CORRECT ANSWER✅✅✅True
T/F: Population-based cohort studies permit investigations of exposures that are uncommon. - CORRECT
ANSWER✅✅✅False
T/F: Risk ratio is defined as the ratio of the offs of exposure among the diseased to the odds among the
non-diseased. - CORRECT ANSWER✅✅✅False
T/F: Randomized clinical trials enroll individual subjects and enable randomization of subjects to receive
and not to receive the intervention in a clinical setting. - CORRECT ANSWER✅✅✅True
, T/F: Treatment crossover refers to any change of treatment for a patient in a clinical trial that involves a
switch of study treatments. - CORRECT ANSWER✅✅✅True
T/F: Experimental designs discussed in this class include randomized controlled trials and community
trials. - CORRECT ANSWER✅✅✅True
In contrast to observational studies, experimental studies are best employed to:
A. Generate knowledge about the natural history of disease
B. Formulate strategies for prevention
C. Test efficacy of prevent or treatment measures
D. None of the above - CORRECT ANSWER✅✅✅C. Test the efficacy of prevention or treatment
measures
To assess clinical end points, investigators:
A. Compare rates of disease
B. Compare rates of death
C. Compare rates of recovery
D. All of the above - CORRECT ANSWER✅✅✅D. All of the above
The purpose of single-blinding study participants in clinical trials is to:
A. Reduce error that results from the way in which the outcome is assessed
B. Reduce error that results from subjects knowledge of their assignment to study conditions
C. Reduce error that results from non-random assignment to study conditions
D. None of the above - CORRECT ANSWER✅✅✅B. Reduce error that results from subject's
knowledge of their assignment to study conditions
Phase I of clinical trials for a cancer drug involve:
A. Initial testing in humans
B. Testing with different tumor types
C. Comparing survival rates for the new drug versus extant therapies
