NR 503 Week 8 Final Quiz (Collection) | Study Package
Deal | Questions and Answers | Latest Update
Section 1: Epidemiologic Foundations & Measures (Q1–Q20)
Q1. Which definition best describes epidemiology as applied in graduate nursing and public
health practice?
A. The study of individual patient diagnoses and treatment plans in clinical settings
B. The study of the distribution and determinants of health-related states or events in specified
populations and the application of this study to the control of health problems
C. The statistical analysis of hospital financial data to improve revenue cycles
D. The laboratory investigation of pathogen morphology and antimicrobial susceptibility
Correct Answer: B
Rationale: Epidemiology is fundamentally the study of population-level patterns of health
and disease, including distribution (who, where, when) and determinants (causes, risk factors),
with the explicit goal of applying findings to control health problems . Distractors A, C, and D
describe clinical medicine, healthcare administration, and microbiology, respectively.
Q2. A community health nurse tracks new cases of Type 2 diabetes in a county of 100,000 adults
over one year. There were 400 new cases diagnosed. What is the incidence rate of Type 2
diabetes in this population?
A. 4 per 1,000 person-years
B. 400 per 100,000 person-years
C. 4 per 100 person-years
D. 0.4 per 1,000 person-years
Correct Answer: A
Rationale: Incidence rate = new cases / population at risk / time = , year =
0.004 per person-year = 4 per 1,000 person-years . The standardization per 1,000 is essential for
comparing rates across populations.
Q3. On March 1, 2026, a nurse epidemiologist surveys a town of 50,000 residents and identifies
750 people currently living with asthma. What is the point prevalence of asthma on that date?
,A. 1.5 per 1,000 population
B. 15 per 1,000 population
C. 150 per 1,000 population
D. 0.15 per 1,000 population
Correct Answer: B
Rationale: Point prevalence = all existing cases at a point in time / total population = 750 /
50,000 = 0.015 = 15 per 1,000 population . Prevalence includes both new and pre-existing cases
at the specified time point.
Q4. During an outbreak of meningococcal disease on a college campus, 45 students develop the
illness and 3 die. What is the case fatality rate?
A. 6.7%
B. 3.0%
C. 15.0%
D. 0.067%
Correct Answer: A
Rationale: Case fatality rate (CFR) = deaths from disease / total cases of disease × 100 =
3/45 × 100 = 6.7% . CFR measures the severity of a disease among those diagnosed, not the risk
in the total population.
Q5. In a city of 500,000 people, there were 2,500 total deaths in 2026. Of these, 750 were due
to cardiovascular disease. What is the proportionate mortality from cardiovascular disease?
A. 0.15%
B. 1.5%
C. 15%
D. 30%
Correct Answer: D
Rationale: Proportionate mortality = deaths from specific cause / total deaths from all
causes × 100 = 750/2,500 × 100 = 30% . This differs from cause-specific mortality rate
(750/500,000), which measures risk in the total population.
,Q6. A 35-year-old dies in a motor vehicle accident. Using an age cutoff of 75 years for YPLL
calculation, how many years of potential life are lost?
A. 30 years
B. 35 years
C. 40 years
D. 75 years
Correct Answer: C
Rationale: YPLL = Age cutoff – Age at death = 75 – 35 = 40 years . Years of potential life lost
quantifies premature mortality and is a key population health indicator.
Q7. A nurse practitioner is investigating a sudden outbreak of foodborne illness among
attendees of a community potluck. Sixty of the 200 attendees developed nausea, vomiting, and
diarrhea within 6 hours of the event. Which epidemiological measure best describes the
proportion of attendees who became ill?
A. Incidence rate
B. Attack rate
C. Prevalence proportion
D. Case fatality rate
Correct Answer: B
Rationale: Attack rate is the proportion of people who become ill among a specific
population at risk during a defined, limited time period . It is the ideal measure for outbreak
investigations where the population is clearly defined and time-limited.
Q8. Which of the following represents the epidemiological triad?
A. Host, vector, treatment
B. Agent, host, environment
C. Time, place, person
D. Exposure, outcome, confounder
Correct Answer: B
, Rationale: The epidemiological triad consists of agent (pathogen or genetic factor), host
(susceptible individual), and environment (external conditions) . Time, place, and person
describe descriptive epidemiology categories, not the triad.
Q9. A public health nurse is analyzing the relationship between air pollution levels and asthma
exacerbations in an urban community. Which component of the epidemiological triad best
represents the socioeconomic factors that influence exposure to poor air quality?
A. Agent
B. Host
C. Environment
D. Vector
Correct Answer: C
Rationale: In the epidemiological triad, the environment encompasses all external factors
that influence the interaction between agent and host, including socioeconomic conditions,
physical surroundings, and broader social determinants of health .
Q10. In a community of 5,000 people, 200 developed Type 2 diabetes in 2023. At the beginning
of 2023, 150 people already had diabetes. What is the prevalence of diabetes at the end of
2023, assuming no deaths or migrations?
A. 7.0%
B. 4.0%
C. 3.0%
D. 7.4%
Correct Answer: A
Rationale: Total cases at end of 2023 = existing cases (150) + new cases (200) = 350.
Prevalence = (350/5,000) × 100 = 7.0% . Prevalence includes both new and pre-existing cases.
Q11. Which of the following statements best describes the difference between incidence and
prevalence?
A. Incidence measures existing cases; prevalence measures new cases
B. Incidence measures new cases over time; prevalence measures all existing cases at a point in
Deal | Questions and Answers | Latest Update
Section 1: Epidemiologic Foundations & Measures (Q1–Q20)
Q1. Which definition best describes epidemiology as applied in graduate nursing and public
health practice?
A. The study of individual patient diagnoses and treatment plans in clinical settings
B. The study of the distribution and determinants of health-related states or events in specified
populations and the application of this study to the control of health problems
C. The statistical analysis of hospital financial data to improve revenue cycles
D. The laboratory investigation of pathogen morphology and antimicrobial susceptibility
Correct Answer: B
Rationale: Epidemiology is fundamentally the study of population-level patterns of health
and disease, including distribution (who, where, when) and determinants (causes, risk factors),
with the explicit goal of applying findings to control health problems . Distractors A, C, and D
describe clinical medicine, healthcare administration, and microbiology, respectively.
Q2. A community health nurse tracks new cases of Type 2 diabetes in a county of 100,000 adults
over one year. There were 400 new cases diagnosed. What is the incidence rate of Type 2
diabetes in this population?
A. 4 per 1,000 person-years
B. 400 per 100,000 person-years
C. 4 per 100 person-years
D. 0.4 per 1,000 person-years
Correct Answer: A
Rationale: Incidence rate = new cases / population at risk / time = , year =
0.004 per person-year = 4 per 1,000 person-years . The standardization per 1,000 is essential for
comparing rates across populations.
Q3. On March 1, 2026, a nurse epidemiologist surveys a town of 50,000 residents and identifies
750 people currently living with asthma. What is the point prevalence of asthma on that date?
,A. 1.5 per 1,000 population
B. 15 per 1,000 population
C. 150 per 1,000 population
D. 0.15 per 1,000 population
Correct Answer: B
Rationale: Point prevalence = all existing cases at a point in time / total population = 750 /
50,000 = 0.015 = 15 per 1,000 population . Prevalence includes both new and pre-existing cases
at the specified time point.
Q4. During an outbreak of meningococcal disease on a college campus, 45 students develop the
illness and 3 die. What is the case fatality rate?
A. 6.7%
B. 3.0%
C. 15.0%
D. 0.067%
Correct Answer: A
Rationale: Case fatality rate (CFR) = deaths from disease / total cases of disease × 100 =
3/45 × 100 = 6.7% . CFR measures the severity of a disease among those diagnosed, not the risk
in the total population.
Q5. In a city of 500,000 people, there were 2,500 total deaths in 2026. Of these, 750 were due
to cardiovascular disease. What is the proportionate mortality from cardiovascular disease?
A. 0.15%
B. 1.5%
C. 15%
D. 30%
Correct Answer: D
Rationale: Proportionate mortality = deaths from specific cause / total deaths from all
causes × 100 = 750/2,500 × 100 = 30% . This differs from cause-specific mortality rate
(750/500,000), which measures risk in the total population.
,Q6. A 35-year-old dies in a motor vehicle accident. Using an age cutoff of 75 years for YPLL
calculation, how many years of potential life are lost?
A. 30 years
B. 35 years
C. 40 years
D. 75 years
Correct Answer: C
Rationale: YPLL = Age cutoff – Age at death = 75 – 35 = 40 years . Years of potential life lost
quantifies premature mortality and is a key population health indicator.
Q7. A nurse practitioner is investigating a sudden outbreak of foodborne illness among
attendees of a community potluck. Sixty of the 200 attendees developed nausea, vomiting, and
diarrhea within 6 hours of the event. Which epidemiological measure best describes the
proportion of attendees who became ill?
A. Incidence rate
B. Attack rate
C. Prevalence proportion
D. Case fatality rate
Correct Answer: B
Rationale: Attack rate is the proportion of people who become ill among a specific
population at risk during a defined, limited time period . It is the ideal measure for outbreak
investigations where the population is clearly defined and time-limited.
Q8. Which of the following represents the epidemiological triad?
A. Host, vector, treatment
B. Agent, host, environment
C. Time, place, person
D. Exposure, outcome, confounder
Correct Answer: B
, Rationale: The epidemiological triad consists of agent (pathogen or genetic factor), host
(susceptible individual), and environment (external conditions) . Time, place, and person
describe descriptive epidemiology categories, not the triad.
Q9. A public health nurse is analyzing the relationship between air pollution levels and asthma
exacerbations in an urban community. Which component of the epidemiological triad best
represents the socioeconomic factors that influence exposure to poor air quality?
A. Agent
B. Host
C. Environment
D. Vector
Correct Answer: C
Rationale: In the epidemiological triad, the environment encompasses all external factors
that influence the interaction between agent and host, including socioeconomic conditions,
physical surroundings, and broader social determinants of health .
Q10. In a community of 5,000 people, 200 developed Type 2 diabetes in 2023. At the beginning
of 2023, 150 people already had diabetes. What is the prevalence of diabetes at the end of
2023, assuming no deaths or migrations?
A. 7.0%
B. 4.0%
C. 3.0%
D. 7.4%
Correct Answer: A
Rationale: Total cases at end of 2023 = existing cases (150) + new cases (200) = 350.
Prevalence = (350/5,000) × 100 = 7.0% . Prevalence includes both new and pre-existing cases.
Q11. Which of the following statements best describes the difference between incidence and
prevalence?
A. Incidence measures existing cases; prevalence measures new cases
B. Incidence measures new cases over time; prevalence measures all existing cases at a point in
