EPI Exam 2 Questions And 100% Correct Answers
Which of the following is not commonly used as a type of analytic epidemiology study -
ANSWER Cross-sectional
The primary goal of any case-control or cohort study, so that the findings can be
generalized to the population under investigation, is to ensure that - ANSWER A valid
result
Which of the following study designs are most suitable where the exposure of interest -
the risk factor - is rare in an observational study? - ANSWER Case-control
What are the advantages of a cohort study? - ANSWER Allows establishment of
temporality of events
Which statistic is most appropriate for measuring the strength of the association
between an exposure and disease outcome in a cohort study? - ANSWER Relative risk
When several potential outcomes are being investigated with a given exposure, which
study design is more appropriate is an observational study? - ANSWER Cohort
Which of the following study design may be either retrospective or prospective but
usually used as an example of prospective? - ANSWER Cohort
The selection of controls in a case-control study may involve the general population,
hospitals, and special populations or family, friends, and relatives. Which of these
sources of controls is more likely to be most costly, to whom it would be more difficult to
ensure cooperation, but at the same time whose results would also be more valid since
it could be applied to the greatest number of people? best specified on the powerpoints
- ANSWER General population
, What measure of association is most appropriate to quantify the strength of the
association of an exposure and disease outcome in a case-control study? - ANSWER
Odds ratio
When interpreting the relative sizes of the numbers in the A, B, C, and D cells of a 2x2
table. - ANSWER A conclusion can't be made by looking at the numbers in a cell in
isolation from the others
A relatively large number in the A cell would indicate that exposure promotes risk of the
outcome
A large number in the D cell provides indirect support that the exposure promotes the
outcome
An exposure has a protective factor. This means - ANSWER The relative risk is < 1
We have a 1.5 odds ratio for living below the Mason-Dixon line and skin cancer. We can
conclude - ANSWER Statement of result is dependent upon adequate statistical
significance as determined by the chi-square
Why did we calculate odds ratio AND a relative risk for some of our 2x2 tables? -
ANSWER So we could have more practice
A larger sample size usually provides us with more confidence in the results of a study
and hence the study becomes more valid - ANSWER True
The method of selection of participants in a study must be right, be it cohort or
case-control for the validity of the study - ANSWER True
Which of the following study design is most susceptible to differential misclassification
because of recall and interviewer bias? - ANSWER Case-control
Which of the following is not commonly used as a type of analytic epidemiology study -
ANSWER Cross-sectional
The primary goal of any case-control or cohort study, so that the findings can be
generalized to the population under investigation, is to ensure that - ANSWER A valid
result
Which of the following study designs are most suitable where the exposure of interest -
the risk factor - is rare in an observational study? - ANSWER Case-control
What are the advantages of a cohort study? - ANSWER Allows establishment of
temporality of events
Which statistic is most appropriate for measuring the strength of the association
between an exposure and disease outcome in a cohort study? - ANSWER Relative risk
When several potential outcomes are being investigated with a given exposure, which
study design is more appropriate is an observational study? - ANSWER Cohort
Which of the following study design may be either retrospective or prospective but
usually used as an example of prospective? - ANSWER Cohort
The selection of controls in a case-control study may involve the general population,
hospitals, and special populations or family, friends, and relatives. Which of these
sources of controls is more likely to be most costly, to whom it would be more difficult to
ensure cooperation, but at the same time whose results would also be more valid since
it could be applied to the greatest number of people? best specified on the powerpoints
- ANSWER General population
, What measure of association is most appropriate to quantify the strength of the
association of an exposure and disease outcome in a case-control study? - ANSWER
Odds ratio
When interpreting the relative sizes of the numbers in the A, B, C, and D cells of a 2x2
table. - ANSWER A conclusion can't be made by looking at the numbers in a cell in
isolation from the others
A relatively large number in the A cell would indicate that exposure promotes risk of the
outcome
A large number in the D cell provides indirect support that the exposure promotes the
outcome
An exposure has a protective factor. This means - ANSWER The relative risk is < 1
We have a 1.5 odds ratio for living below the Mason-Dixon line and skin cancer. We can
conclude - ANSWER Statement of result is dependent upon adequate statistical
significance as determined by the chi-square
Why did we calculate odds ratio AND a relative risk for some of our 2x2 tables? -
ANSWER So we could have more practice
A larger sample size usually provides us with more confidence in the results of a study
and hence the study becomes more valid - ANSWER True
The method of selection of participants in a study must be right, be it cohort or
case-control for the validity of the study - ANSWER True
Which of the following study design is most susceptible to differential misclassification
because of recall and interviewer bias? - ANSWER Case-control
