NR503 Exam 3 Actual Exam Style V2 | NR
503 Population Health, Epidemiology &
Statistical Principles | Chamberlain
1. A nurse practitioner is evaluating a new diagnostic test for influenza. The test’s ability to
correctly identify those who truly do NOT have the disease is referred to as:
A. Sensitivity
B. Negative Predictive Value
C. Positive Predictive Value
D. Specificity
Answer: D
Rationale: Specificity is the probability that a test will be negative when applied to a
person who does not have a given disease. It focuses on identifying true negatives within a
population. High specificity ensures that healthy individuals are not incorrectly diagnosed
with a condition.
2. Which of the following interventions is categorized as secondary prevention?
A. Administering a tetanus booster shot
B. Performing a routine mammogram on a 50-year-old woman
C. Providing physical therapy after a hip replacement
D. Educating high school students about the dangers of smoking
,Answer: B
Rationale: Secondary prevention involves screening and early detection of diseases to
prevent progression. A mammogram is a classic screening tool used to find breast cancer in
its early, more treatable stages. Primary prevention focuses on avoiding disease altogether,
while tertiary focuses on rehabilitation.
3. When examining the ‘Web of Causation’ model, what is the primary focus of this
epidemiological approach?
A. Mapping the complex interaction of multiple risk factors for chronic diseases
B. Identifying a single definitive cause for an infectious disease
C. Determining the rate of transmission between a host and an agent
D. Evaluating the effectiveness of a specific vaccine in a trial
Answer: A
Rationale: The Web of Causation is used to illustrate the complex interrelationships of
factors which lead to chronic diseases. It acknowledges that most health conditions do not
have a single cause but result from numerous intersecting variables. This model is
particularly useful in population health for identifying multiple points of intervention.
4. A study follows a group of smokers and non-smokers over 10 years to see who develops
lung cancer. This is an example of a:
A. Case-control study
B. Cross-sectional study
, C. Randomized Controlled Trial
D. Cohort study
Answer: D
Rationale: A cohort study identifies a group based on their exposure and follows them
over time to observe outcomes. This longitudinal approach allows researchers to calculate
the incidence of a disease. It is different from a case-control study, which starts with the
disease and looks backward at exposures.
5. Cultural humility, as opposed to cultural competence, is characterized by:
A. Mastering all the facts about a specific ethnic group’s traditions
B. Using a standardized checklist for every patient interaction
C. A lifelong commitment to self-evaluation and critique
D. Ensuring all office signs are translated into at least three languages
Answer: C
Rationale: Cultural humility involves a reflective process where the provider
acknowledges their own biases and limitations. It shifts the focus from ‘knowing’
everything about a culture to maintaining an open, learner-oriented mindset. This
approach fosters a more equitable power dynamic between the clinician and the patient.
6. In epidemiology, the ‘Epidemiological Triangle’ consists of which three components?
A. Host, Agent, and Environment
503 Population Health, Epidemiology &
Statistical Principles | Chamberlain
1. A nurse practitioner is evaluating a new diagnostic test for influenza. The test’s ability to
correctly identify those who truly do NOT have the disease is referred to as:
A. Sensitivity
B. Negative Predictive Value
C. Positive Predictive Value
D. Specificity
Answer: D
Rationale: Specificity is the probability that a test will be negative when applied to a
person who does not have a given disease. It focuses on identifying true negatives within a
population. High specificity ensures that healthy individuals are not incorrectly diagnosed
with a condition.
2. Which of the following interventions is categorized as secondary prevention?
A. Administering a tetanus booster shot
B. Performing a routine mammogram on a 50-year-old woman
C. Providing physical therapy after a hip replacement
D. Educating high school students about the dangers of smoking
,Answer: B
Rationale: Secondary prevention involves screening and early detection of diseases to
prevent progression. A mammogram is a classic screening tool used to find breast cancer in
its early, more treatable stages. Primary prevention focuses on avoiding disease altogether,
while tertiary focuses on rehabilitation.
3. When examining the ‘Web of Causation’ model, what is the primary focus of this
epidemiological approach?
A. Mapping the complex interaction of multiple risk factors for chronic diseases
B. Identifying a single definitive cause for an infectious disease
C. Determining the rate of transmission between a host and an agent
D. Evaluating the effectiveness of a specific vaccine in a trial
Answer: A
Rationale: The Web of Causation is used to illustrate the complex interrelationships of
factors which lead to chronic diseases. It acknowledges that most health conditions do not
have a single cause but result from numerous intersecting variables. This model is
particularly useful in population health for identifying multiple points of intervention.
4. A study follows a group of smokers and non-smokers over 10 years to see who develops
lung cancer. This is an example of a:
A. Case-control study
B. Cross-sectional study
, C. Randomized Controlled Trial
D. Cohort study
Answer: D
Rationale: A cohort study identifies a group based on their exposure and follows them
over time to observe outcomes. This longitudinal approach allows researchers to calculate
the incidence of a disease. It is different from a case-control study, which starts with the
disease and looks backward at exposures.
5. Cultural humility, as opposed to cultural competence, is characterized by:
A. Mastering all the facts about a specific ethnic group’s traditions
B. Using a standardized checklist for every patient interaction
C. A lifelong commitment to self-evaluation and critique
D. Ensuring all office signs are translated into at least three languages
Answer: C
Rationale: Cultural humility involves a reflective process where the provider
acknowledges their own biases and limitations. It shifts the focus from ‘knowing’
everything about a culture to maintaining an open, learner-oriented mindset. This
approach fosters a more equitable power dynamic between the clinician and the patient.
6. In epidemiology, the ‘Epidemiological Triangle’ consists of which three components?
A. Host, Agent, and Environment
