NR 503 Population Health, Epidemiology & Statistical Principles
Midterm Exam – Chamberlain
Questions with Verified Answers, 100% Guarantee Pass
1. After entry into the study, patients were first classified into three
groups, those who had a previous AMI, those with a first AMI who were
at high risk for other cardiovascular diseases such as congestive heart
failure, and those with a first AMI who were at low risk for other
cardiovascular diseases. Which
term best describes the study design?
Answer> Randomized clinical trial with stratified
randomization
2. After assignment to treatment group, 77% of those in the placebo
group were men, while 80% of those in the drug X group were men.
Which statement is most likely to be true?
Answer> Randomization was successful since the investigators did not alter
the selection of participants in either group in order to ensure equal
percentages of men
,3. A preliminary analysis was conducted after 6 months and found that
87% of participants in the placebo group and 85% of those in the drug
X group had taken more than 90% of their prescribed dosages. Which
statement best describes this finding?
Answer> The characteristics of patients who failed to comply with the
treatment dosages should be assessed as they may differ from those who
complied
4. Which of the following statements best describes the reason for
conduct- ing the study as a double-blind trial?
Answer> Double blinding ensures that potential biases regarding selection,
follow-up, and analysis can be reduced
5. The following data come from a study of approaches to smoking
cessation. Smokers who want to quit were randomized to one of four
groups
control ..... brochures and a monthly phone call from a counselor.
Participants received mailed surveys at 8, 16, and 24 months after
,randomization. The results after 2 years are in the table below. Which
group had the least success in terms of quitting smoking?
Answer> Group QS
6. The following data come from a study of approaches to smoking
cessation. Smokers who want to quit were randomized to one of four
groups
control group C who received no intervention assistance, quitting guide
group Q who received brochures about how to quit smoking, quitting
guide and support group QS who received quitting brochures as well as
social support brochures listing benefits of smoking cessation, and
telephone support group T who received the brochures and a monthly
phone call from a counselor. Partici- pants received mailed surveys at 8,
16, and 24 months after randomization. The results after 2 years are in
the table below. What is the main purpose of randomization in this
study?
Answer> To avoid assigning more persons who have tried and failed to quit
in the past to the control group
7. The nurse practitioner is reviewing a recent study that utilizes analytic
epidemiology by means of a cohort study design. The cohort study
design informs the practitioner about which of the following
, Answer> Outcomes that develop from an exposure
8. A group of providers have implemented population-based
intervention and are now assessing the efficacy of the intervention.
Which of the following would be an example of a population based
outcome?
Answer> Decreased mortality rate compared to previous year
9. Appraisal of research publications is critical as providers assess for
rele- vance to population health. Which of the following items should be
considered during the appraisal process? Select all that apply.
Answer> Outcome measure, Trans- parency, Internal Validity
10. What is being compared in a cohort study design?
Answer> The incidence of a disease between exposed and non-exposed
individuals
11. Analytic epidemiology is best described as
Answer> Studies that investigate origins and casuals' factors of health-
related events
Midterm Exam – Chamberlain
Questions with Verified Answers, 100% Guarantee Pass
1. After entry into the study, patients were first classified into three
groups, those who had a previous AMI, those with a first AMI who were
at high risk for other cardiovascular diseases such as congestive heart
failure, and those with a first AMI who were at low risk for other
cardiovascular diseases. Which
term best describes the study design?
Answer> Randomized clinical trial with stratified
randomization
2. After assignment to treatment group, 77% of those in the placebo
group were men, while 80% of those in the drug X group were men.
Which statement is most likely to be true?
Answer> Randomization was successful since the investigators did not alter
the selection of participants in either group in order to ensure equal
percentages of men
,3. A preliminary analysis was conducted after 6 months and found that
87% of participants in the placebo group and 85% of those in the drug
X group had taken more than 90% of their prescribed dosages. Which
statement best describes this finding?
Answer> The characteristics of patients who failed to comply with the
treatment dosages should be assessed as they may differ from those who
complied
4. Which of the following statements best describes the reason for
conduct- ing the study as a double-blind trial?
Answer> Double blinding ensures that potential biases regarding selection,
follow-up, and analysis can be reduced
5. The following data come from a study of approaches to smoking
cessation. Smokers who want to quit were randomized to one of four
groups
control ..... brochures and a monthly phone call from a counselor.
Participants received mailed surveys at 8, 16, and 24 months after
,randomization. The results after 2 years are in the table below. Which
group had the least success in terms of quitting smoking?
Answer> Group QS
6. The following data come from a study of approaches to smoking
cessation. Smokers who want to quit were randomized to one of four
groups
control group C who received no intervention assistance, quitting guide
group Q who received brochures about how to quit smoking, quitting
guide and support group QS who received quitting brochures as well as
social support brochures listing benefits of smoking cessation, and
telephone support group T who received the brochures and a monthly
phone call from a counselor. Partici- pants received mailed surveys at 8,
16, and 24 months after randomization. The results after 2 years are in
the table below. What is the main purpose of randomization in this
study?
Answer> To avoid assigning more persons who have tried and failed to quit
in the past to the control group
7. The nurse practitioner is reviewing a recent study that utilizes analytic
epidemiology by means of a cohort study design. The cohort study
design informs the practitioner about which of the following
, Answer> Outcomes that develop from an exposure
8. A group of providers have implemented population-based
intervention and are now assessing the efficacy of the intervention.
Which of the following would be an example of a population based
outcome?
Answer> Decreased mortality rate compared to previous year
9. Appraisal of research publications is critical as providers assess for
rele- vance to population health. Which of the following items should be
considered during the appraisal process? Select all that apply.
Answer> Outcome measure, Trans- parency, Internal Validity
10. What is being compared in a cohort study design?
Answer> The incidence of a disease between exposed and non-exposed
individuals
11. Analytic epidemiology is best described as
Answer> Studies that investigate origins and casuals' factors of health-
related events
