MPH 6011 FINAL (CONT) EXAM
QUESTIONS WITH 100% CORRECT
ANSWERS!!
1 of 60
Term
T/F: Randomization is a means of minimizing the role of chance in an
association between two variables.
Give this one a try later!
false randomization
d. case series true
, Don't know?
2 of 60
Term
Your study of bone density and risk of diabetes finds a risk ratio of
4.0. You have controlled for some confounding, but are worried
other types of bias may be present. You consult with other
colleagues and discuss how much bias may or may not be present.
You conclude that even if the RR of 4.0 is somewhat biased, it is
unlikely that there is sufficient bias present that would reduce the
association to completely null. This is an example of which of causal
criteria?
Give this one a try later!
Effect modification Natural experiment
Dose-response, temporality Strength of association
Don't know?
3 of 60
Term
In a study, the association between smoking and coronary
heart disease was investigated by selecting for study a group
of 3000 smokers and 5000 non-smokers who were free of
disease at
, baseline. Both groups were followed for the development of
coronary heart disease. 84 smokers developed coronary heart
disease and 87 non smokers did too. 4913 persons did not develop
disease and did not smoke. One measure of association relating
exposed to unexposed would be:
Give this one a try later!
b. Lack of temporality Natural experiment
(84/3000) / (87/5000) taking a simple random sample
Don't know?
4 of 60
Term
A researcher wants to study the impact of a diet high in antioxidants
on the incidence of cardiovascular disease among women who have
completed treatment for breast cancer. The investigator uses the
electronic medical records from a large hospital system to
identify women who completed breast cancer treatment (and
had no cardiovascular disease at the end of cancer treatment). The
investigator mails a food frequency questionnaire to participants
asking them to report the specific foods (and amounts) consumed in
the last 2 weeks. After five years, the investigator looks to see who
was diagnosed with cardiovascular disease based on documentation
in the medical record. What type of study design is this?
, Give this one a try later!
Retrospective observational cohort
study Natural experiment
A. cohort study Prospective observational
b. case-control study cohort study
Don't know?
5 of 60
Term
The odds ratio (OR) between beer consumption and headache is
2.0. You wonder if eating pizza or not eating pizza may influence
the association between beer consumption and headache. When
you stratify by pizza consumption the OR between beer
consumption and headache is 3.0 for people not eating pizza but
1.0 for people eating pizza. This is an example of:
Give this one a try later!
Effect modification recall bias
all of the above Effect measure modification
Don't know?
QUESTIONS WITH 100% CORRECT
ANSWERS!!
1 of 60
Term
T/F: Randomization is a means of minimizing the role of chance in an
association between two variables.
Give this one a try later!
false randomization
d. case series true
, Don't know?
2 of 60
Term
Your study of bone density and risk of diabetes finds a risk ratio of
4.0. You have controlled for some confounding, but are worried
other types of bias may be present. You consult with other
colleagues and discuss how much bias may or may not be present.
You conclude that even if the RR of 4.0 is somewhat biased, it is
unlikely that there is sufficient bias present that would reduce the
association to completely null. This is an example of which of causal
criteria?
Give this one a try later!
Effect modification Natural experiment
Dose-response, temporality Strength of association
Don't know?
3 of 60
Term
In a study, the association between smoking and coronary
heart disease was investigated by selecting for study a group
of 3000 smokers and 5000 non-smokers who were free of
disease at
, baseline. Both groups were followed for the development of
coronary heart disease. 84 smokers developed coronary heart
disease and 87 non smokers did too. 4913 persons did not develop
disease and did not smoke. One measure of association relating
exposed to unexposed would be:
Give this one a try later!
b. Lack of temporality Natural experiment
(84/3000) / (87/5000) taking a simple random sample
Don't know?
4 of 60
Term
A researcher wants to study the impact of a diet high in antioxidants
on the incidence of cardiovascular disease among women who have
completed treatment for breast cancer. The investigator uses the
electronic medical records from a large hospital system to
identify women who completed breast cancer treatment (and
had no cardiovascular disease at the end of cancer treatment). The
investigator mails a food frequency questionnaire to participants
asking them to report the specific foods (and amounts) consumed in
the last 2 weeks. After five years, the investigator looks to see who
was diagnosed with cardiovascular disease based on documentation
in the medical record. What type of study design is this?
, Give this one a try later!
Retrospective observational cohort
study Natural experiment
A. cohort study Prospective observational
b. case-control study cohort study
Don't know?
5 of 60
Term
The odds ratio (OR) between beer consumption and headache is
2.0. You wonder if eating pizza or not eating pizza may influence
the association between beer consumption and headache. When
you stratify by pizza consumption the OR between beer
consumption and headache is 3.0 for people not eating pizza but
1.0 for people eating pizza. This is an example of:
Give this one a try later!
Effect modification recall bias
all of the above Effect measure modification
Don't know?
