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Exam (elaborations)

NR503 Exam Questions and Answers

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NR503 Exam Questions and Answers

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NR503
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NR503

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December 17, 2025
Number of pages
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2025/2026
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Terms in this set (107)


The nurse practitioner is reviewing a recent Outcomes that develop from an exposure
study that utilizes analytic epidemiology by
means of a cohort study design. The cohort
study design informs the practitioner about
which of the following

A group of providers have implemented Decreased mortality rate compared to previous year
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?

Appraisal of research publications is critical Outcome measure, Transparency, Internal Validity
as providers assess for relevance to
population health. Which of the following
items should be considered during the
appraisal process? Select all that apply.

What is being compared in a cohort study The incidence of a disease between exposed and non-exposed individuals
design?

Analytic epidemiology is best described as: Studies that investigate origins and casuals' factors of health-related events

You are part of a research group Case-Control Study
investigating association between
exposure and disease. Which study design
is a best fit for this type of study:

The provider is concerned about what Vital statistic
appears to be an increase in the mortality
rate for their community. Mortality is an
example of which of the following:

An example of a tertiary prevention Pulmonary Rehabilitation
measure for chronic obstructive pulmonary
disease is:

,Which of the following statements best It is an estimate of the benefit of treatment under ideal conditions
describe efficacy? It is an estimate of the reduction of disease in treated groups

A study is conducted for a pharmaceutical The generalizability of the study is increased
agent that has shown promise for reducing
heart disease among women. In order to
more fully test the agent, an additional
study is done restricting the participants to
be randomized to those who have a history
of hypertension. Which of the following
advantages cannot be claimed by the
researchers?

What is the main advantage of the Reduces selection bias
randomization of the 168 study participants
to one of the two drug treatment groups?

After entry into the study, patients were Randomized clinical trial with stratified randomization
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?

After assignment to treatment group, 77% Randomization was successful since the investigators did not alter the selection of
of those in the placebo group were men, participants in either group in order to ensure equal percentages of men
while 80% of those in the drug X group
were men. Which statement is most likely to
be true?

A preliminary analysis was conducted after The characteristics of patients who failed to comply with the treatment dosages
6 months and found that 87% of should be assessed as they may differ from those who complied
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?

Which of the following statements best Double blinding ensures that potential biases regarding selection, follow-up, and
describes the reason for conducting the analysis can be reduced
study as a double-blind trial?

The following data come from a study of Group QS
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?

, The following data come from a study of To avoid assigning more persons who have tried and failed to quit in the past to the
approaches to smoking cessation. Smokers control group
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.
Participants 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?

Test A has a sensitivity of 95% and a The total number of false positives found by both tests is decreased if Test B is given
specificity of 90%. Test B has a sensitivity of first
80% and a specificity of 98%. In a
community of 10,000 people with 5%
prevalence of the disease, Test A has
always been given before Test B. What is
the best reason for changing the order of
the tests?

This table represents the results of Sensitivity will decrease
coronary magnetic resonance (CMR)
angiography compared to x-ray
angiography (the gold standard in
diagnosis of coronary artery disease) in a
high-risk population of patients scheduled
to undergo x-ray angiography for
suspected coronary artery disease.After
reviewing the results of the test
comparison, an epidemiologist decides
that the specificity of the test is too low.
Using the same CMR images, he raises the
cutoff value for a positive test to increase
the specificity. What is the likely effect on
the sensitivity?

In comparing the mammography readings Overall percent agreement calculated for both readers may conceal significant
of two technicians who evaluated the same disagreements regarding positive tests
set of 600 mammograms for presence of
breast cancer from a generally
representative sample of women from the
population

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