NR503 Final Exam Actual Exam Style V2 |
NR 503 Population Health, Epidemiology
& Statistical Principles | Chamberlain
1. A nurse practitioner is reviewing a study that tracks a group of healthy individuals over 10
years to determine the development of heart disease based on their exercise habits. What
type of study design is this?
A. Case-control study
B. Ecological study
C. Cross-sectional study
D. Cohort study
Correct Answer: D
Expert Explanation: A cohort study follows a specific population over a period of time to
observe outcomes after exposure. This design is longitudinal and helps in determining the
incidence of a disease. It is different from case-control studies which look backward from
an outcome to a cause.
2. Which of the following describes the ability of a screening test to correctly identify those
who truly do not have the disease?
A. Sensitivity
B. Specificity
C. Positive Predictive Value
,D. Reliability
Correct Answer: B
Expert Explanation: Specificity is the proportion of people without the disease who test
negative. A high specificity means there are fewer false positives in the results. This is a
crucial metric for ensuring that healthy individuals are not subjected to unnecessary
follow-up treatments.
3. A provider is analyzing the number of new cases of influenza in a community during the
month of January. This measurement is known as:
A. Prevalence
B. Mortality Rate
C. Attack Rate
D. Incidence
Correct Answer: D
Expert Explanation: Incidence refers to the number of new cases of a disease that develop
in a population during a specific time period. It helps researchers understand the risk of
contracting the disease within that timeframe. Prevalence, by contrast, includes both new
and existing cases at a single point in time.
4. Which ethical principle from the Belmont Report emphasizes the fair distribution of the
benefits and burdens of research?
A. Justice
, B. Beneficence
C. Autonomy
D. Non-maleficence
Correct Answer: A
Expert Explanation: Justice requires that the selection of research participants is
equitable and that no group is unfairly targeted or excluded. It ensures that the rewards of
research are shared across the population rather than just by a privileged few. This
principle prevents the exploitation of vulnerable groups in clinical trials.
5. A patient asks why they need a mammogram every year. The provider explains that finding
cancer early improves treatment outcomes. This is an example of which level of prevention?
A. Primary Prevention
B. Tertiary Prevention
C. Secondary Prevention
D. Quaternary Prevention
Correct Answer: C
Expert Explanation: Secondary prevention focuses on early detection and screening to
identify diseases in their earliest stages. By catching a condition early, providers can
intervene before the disease progresses or symptoms become severe. Primary prevention,
on the other hand, aims to prevent the disease from occurring at all.
NR 503 Population Health, Epidemiology
& Statistical Principles | Chamberlain
1. A nurse practitioner is reviewing a study that tracks a group of healthy individuals over 10
years to determine the development of heart disease based on their exercise habits. What
type of study design is this?
A. Case-control study
B. Ecological study
C. Cross-sectional study
D. Cohort study
Correct Answer: D
Expert Explanation: A cohort study follows a specific population over a period of time to
observe outcomes after exposure. This design is longitudinal and helps in determining the
incidence of a disease. It is different from case-control studies which look backward from
an outcome to a cause.
2. Which of the following describes the ability of a screening test to correctly identify those
who truly do not have the disease?
A. Sensitivity
B. Specificity
C. Positive Predictive Value
,D. Reliability
Correct Answer: B
Expert Explanation: Specificity is the proportion of people without the disease who test
negative. A high specificity means there are fewer false positives in the results. This is a
crucial metric for ensuring that healthy individuals are not subjected to unnecessary
follow-up treatments.
3. A provider is analyzing the number of new cases of influenza in a community during the
month of January. This measurement is known as:
A. Prevalence
B. Mortality Rate
C. Attack Rate
D. Incidence
Correct Answer: D
Expert Explanation: Incidence refers to the number of new cases of a disease that develop
in a population during a specific time period. It helps researchers understand the risk of
contracting the disease within that timeframe. Prevalence, by contrast, includes both new
and existing cases at a single point in time.
4. Which ethical principle from the Belmont Report emphasizes the fair distribution of the
benefits and burdens of research?
A. Justice
, B. Beneficence
C. Autonomy
D. Non-maleficence
Correct Answer: A
Expert Explanation: Justice requires that the selection of research participants is
equitable and that no group is unfairly targeted or excluded. It ensures that the rewards of
research are shared across the population rather than just by a privileged few. This
principle prevents the exploitation of vulnerable groups in clinical trials.
5. A patient asks why they need a mammogram every year. The provider explains that finding
cancer early improves treatment outcomes. This is an example of which level of prevention?
A. Primary Prevention
B. Tertiary Prevention
C. Secondary Prevention
D. Quaternary Prevention
Correct Answer: C
Expert Explanation: Secondary prevention focuses on early detection and screening to
identify diseases in their earliest stages. By catching a condition early, providers can
intervene before the disease progresses or symptoms become severe. Primary prevention,
on the other hand, aims to prevent the disease from occurring at all.
