NR503 Exam 2 Actual Exam Style V2 | NR
503 Population Health, Epidemiology &
Statistical Principles | Chamberlain
1. A nurse practitioner is evaluating a new diagnostic test for a specific disease. Which term
describes the ability of a test to correctly identify those who truly do not have the disease?
A. Sensitivity
B. Positive Predictive Value
C. Specificity
D. Reliability
Correct Answer: C
Expert Explanation: Specificity refers to the proportion of people without the disease who
have a negative test result. It helps in minimizing false positives, ensuring that healthy
individuals are not incorrectly labeled as having the condition. A highly specific test is most
useful when you want to confirm a diagnosis.
2. When assessing the impact of a chronic illness within a community, which measure
provides information about the number of existing cases at a specific point in time?
A. Incidence Rate
B. Attack Rate
C. Mortality Rate
,D. Prevalence
Correct Answer: D
Expert Explanation: Prevalence is the total number of individuals in a population who
have a disease at a particular time. It differs from incidence, which measures only new
cases during a specific period. Understanding prevalence is essential for healthcare
planning and resource allocation for chronic conditions.
3. A researcher is conducting a study where they identify a group of individuals with a lung
condition and a group without the condition, then look back at their history of exposure to
environmental toxins. What type of study design is this?
A. Case-Control Study
B. Cohort Study
C. Randomized Controlled Trial
D. Cross-Sectional Study
Correct Answer: A
Expert Explanation: Case-control studies start with the outcome and look backward in
time to identify potential exposures or risk factors. This design is particularly efficient for
studying rare diseases or outcomes with long latency periods. It relies on the comparison
between cases and a control group of similar individuals without the disease.
, 4. Which of the following describes the ‘Social Determinants of Health’ according to the
World Health Organization?
A. The genetic makeup of individuals within a population
B. The conditions in which people are born, grow, live, work, and age
C. The number of hospitals available in a high-income country
D. The strict biological markers that determine lifespan
Correct Answer: B
Expert Explanation: Social determinants of health (SDOH) are non-medical factors that
influence health outcomes. They include economic stability, education access, and the
physical environment where people reside. These factors are shaped by the distribution of
money, power, and resources at global, national, and local levels.
5. In an epidemiological study, the ‘Relative Risk’ is calculated to be 2.5. How should the
provider interpret this result?
A. The exposed group is 2.5 times more likely to develop the disease than the unexposed
group.
B. There is no association between the exposure and the disease.
C. The exposure is a protective factor against the disease.
D. The disease is 2.5 times more prevalent in the general population than the exposed
group.
503 Population Health, Epidemiology &
Statistical Principles | Chamberlain
1. A nurse practitioner is evaluating a new diagnostic test for a specific disease. Which term
describes the ability of a test to correctly identify those who truly do not have the disease?
A. Sensitivity
B. Positive Predictive Value
C. Specificity
D. Reliability
Correct Answer: C
Expert Explanation: Specificity refers to the proportion of people without the disease who
have a negative test result. It helps in minimizing false positives, ensuring that healthy
individuals are not incorrectly labeled as having the condition. A highly specific test is most
useful when you want to confirm a diagnosis.
2. When assessing the impact of a chronic illness within a community, which measure
provides information about the number of existing cases at a specific point in time?
A. Incidence Rate
B. Attack Rate
C. Mortality Rate
,D. Prevalence
Correct Answer: D
Expert Explanation: Prevalence is the total number of individuals in a population who
have a disease at a particular time. It differs from incidence, which measures only new
cases during a specific period. Understanding prevalence is essential for healthcare
planning and resource allocation for chronic conditions.
3. A researcher is conducting a study where they identify a group of individuals with a lung
condition and a group without the condition, then look back at their history of exposure to
environmental toxins. What type of study design is this?
A. Case-Control Study
B. Cohort Study
C. Randomized Controlled Trial
D. Cross-Sectional Study
Correct Answer: A
Expert Explanation: Case-control studies start with the outcome and look backward in
time to identify potential exposures or risk factors. This design is particularly efficient for
studying rare diseases or outcomes with long latency periods. It relies on the comparison
between cases and a control group of similar individuals without the disease.
, 4. Which of the following describes the ‘Social Determinants of Health’ according to the
World Health Organization?
A. The genetic makeup of individuals within a population
B. The conditions in which people are born, grow, live, work, and age
C. The number of hospitals available in a high-income country
D. The strict biological markers that determine lifespan
Correct Answer: B
Expert Explanation: Social determinants of health (SDOH) are non-medical factors that
influence health outcomes. They include economic stability, education access, and the
physical environment where people reside. These factors are shaped by the distribution of
money, power, and resources at global, national, and local levels.
5. In an epidemiological study, the ‘Relative Risk’ is calculated to be 2.5. How should the
provider interpret this result?
A. The exposed group is 2.5 times more likely to develop the disease than the unexposed
group.
B. There is no association between the exposure and the disease.
C. The exposure is a protective factor against the disease.
D. The disease is 2.5 times more prevalent in the general population than the exposed
group.
