NSG 3480 PRACTICE COMMUNITY HEALTH EXAM 2 (PDF) |
2026 EXAM QUESTIONS AND ANSWERS + RATIONALES |
STUDY GUIDE | 100% CORRECT
1. Which of the following best defines epidemiology according to community health nursing
practice?
A) The study of how diseases are treated in clinical settings
B) The study of the distribution and determinants of health and disease in human populations
C) The study of individual patient responses to medication
D) The study of healthcare system financing and administration
Correct Answer: B) The study of the distribution and determinants of health and disease in
human populations
Rationale: Epidemiology provides the scientific foundation for community health nursing by
identifying patterns, causes, and risk factors of health problems in populations. It is not focused
on individual clinical treatment or medication responses .
2. What are the three elements of the epidemiological triangle?
A) Person, place, and time
B) Incidence, prevalence, and mortality
C) Agent, host, and environment
D) Primary, secondary, and tertiary
Correct Answer: C) Agent, host, and environment
Rationale: The epidemiological triangle consists of three elements: agent (the cause of disease),
host (the organism that carries the disease), and environment (external factors that affect the
spread of disease). Person, place, and time represent a different epidemiological model .
,3. What is the primary difference between incidence and prevalence?
A) Incidence measures all cases; prevalence measures new cases only
B) Incidence measures new cases; prevalence measures all existing cases
C) Incidence measures mortality; prevalence measures morbidity
D) Incidence measures disease severity; prevalence measures disease duration
Correct Answer: B) Incidence measures new cases; prevalence measures all existing cases
Rationale: Incidence describes the occurrence of new cases of a disease or condition in a
community. Prevalence is the number of all cases (both new and existing) of a specific disease in
a population at a given point in time .
4. The "person, place, time" model of epidemiology includes which of the following as the
"person" factor?
A) Geographic location and climate
B) Demographic characteristics, health, and disease status
C) Time of day, week, or month
D) Political and social environment
Correct Answer: B) Demographic characteristics, health, and disease status
Rationale: In the "person, place, time" model, the "person" factor includes demographic
characteristics, health, and disease status. "Place" includes geographic location and
environmental conditions, while "time" includes secular trends and time of occurrence .
5. A community health nurse is comparing local health data with data from other cities, counties,
and the nation. This process is best described as:
A) Risk assessment
B) Meaningful comparison
C) Epidemiological surveillance
,D) Community diagnosis
Correct Answer: B) Meaningful comparison
Rationale: The nurse compares data with rates from other cities, counties, districts, or states,
from the nation, and from previous records to show trends. This meaningful comparison helps
identify whether local health problems are above or below expected levels .
6. What is the definition of risk in epidemiological terms?
A) The total number of deaths from a disease
B) The probability of an adverse event
C) The number of existing cases of a disease
D) The severity of a disease condition
Correct Answer: B) The probability of an adverse event
Rationale: Risk is defined as the probability of an adverse event. It quantifies the likelihood that
a person will develop a disease or experience a negative health outcome. This is distinct from
incidence (new cases) or prevalence (existing cases) .
7. Which type of epidemiology focuses on the amount and distribution of health and health
problems within a population?
A) Analytic epidemiology
B) Descriptive epidemiology
C) Experimental epidemiology
D) Clinical epidemiology
Correct Answer: B) Descriptive epidemiology
, Rationale: Descriptive epidemiology focuses on the amount and distribution of health and health
problems within a population. Its purpose is to describe the characteristics of both people who
are protected from disease and those who have a disease. Analytic epidemiology investigates
causes .
8. A researcher is studying why a disease rate is lower in one population group than in another.
Which type of epidemiology is being used?
A) Descriptive epidemiology
B) Analytic epidemiology
C) Observational epidemiology
D) Experimental epidemiology
Correct Answer: B) Analytic epidemiology
Rationale: Analytic epidemiology investigates the causes of disease by determining why a
disease rate is lower in one population group than in another. It seeks to identify risk factors and
causal relationships through study designs like cohort and case-control studies .
9. Which of the following is an example of an observational research study in epidemiology?
A) Randomized controlled trial
B) Cross-sectional study
C) Clinical trial
D) Laboratory experiment
Correct Answer: B) Cross-sectional study
Rationale: Cross-sectional studies are a type of observational research that examine the
relationship between exposures and outcomes at a single point in time. Unlike experimental
studies (randomized controlled trials, clinical trials), observational studies do not involve
intervention .
2026 EXAM QUESTIONS AND ANSWERS + RATIONALES |
STUDY GUIDE | 100% CORRECT
1. Which of the following best defines epidemiology according to community health nursing
practice?
A) The study of how diseases are treated in clinical settings
B) The study of the distribution and determinants of health and disease in human populations
C) The study of individual patient responses to medication
D) The study of healthcare system financing and administration
Correct Answer: B) The study of the distribution and determinants of health and disease in
human populations
Rationale: Epidemiology provides the scientific foundation for community health nursing by
identifying patterns, causes, and risk factors of health problems in populations. It is not focused
on individual clinical treatment or medication responses .
2. What are the three elements of the epidemiological triangle?
A) Person, place, and time
B) Incidence, prevalence, and mortality
C) Agent, host, and environment
D) Primary, secondary, and tertiary
Correct Answer: C) Agent, host, and environment
Rationale: The epidemiological triangle consists of three elements: agent (the cause of disease),
host (the organism that carries the disease), and environment (external factors that affect the
spread of disease). Person, place, and time represent a different epidemiological model .
,3. What is the primary difference between incidence and prevalence?
A) Incidence measures all cases; prevalence measures new cases only
B) Incidence measures new cases; prevalence measures all existing cases
C) Incidence measures mortality; prevalence measures morbidity
D) Incidence measures disease severity; prevalence measures disease duration
Correct Answer: B) Incidence measures new cases; prevalence measures all existing cases
Rationale: Incidence describes the occurrence of new cases of a disease or condition in a
community. Prevalence is the number of all cases (both new and existing) of a specific disease in
a population at a given point in time .
4. The "person, place, time" model of epidemiology includes which of the following as the
"person" factor?
A) Geographic location and climate
B) Demographic characteristics, health, and disease status
C) Time of day, week, or month
D) Political and social environment
Correct Answer: B) Demographic characteristics, health, and disease status
Rationale: In the "person, place, time" model, the "person" factor includes demographic
characteristics, health, and disease status. "Place" includes geographic location and
environmental conditions, while "time" includes secular trends and time of occurrence .
5. A community health nurse is comparing local health data with data from other cities, counties,
and the nation. This process is best described as:
A) Risk assessment
B) Meaningful comparison
C) Epidemiological surveillance
,D) Community diagnosis
Correct Answer: B) Meaningful comparison
Rationale: The nurse compares data with rates from other cities, counties, districts, or states,
from the nation, and from previous records to show trends. This meaningful comparison helps
identify whether local health problems are above or below expected levels .
6. What is the definition of risk in epidemiological terms?
A) The total number of deaths from a disease
B) The probability of an adverse event
C) The number of existing cases of a disease
D) The severity of a disease condition
Correct Answer: B) The probability of an adverse event
Rationale: Risk is defined as the probability of an adverse event. It quantifies the likelihood that
a person will develop a disease or experience a negative health outcome. This is distinct from
incidence (new cases) or prevalence (existing cases) .
7. Which type of epidemiology focuses on the amount and distribution of health and health
problems within a population?
A) Analytic epidemiology
B) Descriptive epidemiology
C) Experimental epidemiology
D) Clinical epidemiology
Correct Answer: B) Descriptive epidemiology
, Rationale: Descriptive epidemiology focuses on the amount and distribution of health and health
problems within a population. Its purpose is to describe the characteristics of both people who
are protected from disease and those who have a disease. Analytic epidemiology investigates
causes .
8. A researcher is studying why a disease rate is lower in one population group than in another.
Which type of epidemiology is being used?
A) Descriptive epidemiology
B) Analytic epidemiology
C) Observational epidemiology
D) Experimental epidemiology
Correct Answer: B) Analytic epidemiology
Rationale: Analytic epidemiology investigates the causes of disease by determining why a
disease rate is lower in one population group than in another. It seeks to identify risk factors and
causal relationships through study designs like cohort and case-control studies .
9. Which of the following is an example of an observational research study in epidemiology?
A) Randomized controlled trial
B) Cross-sectional study
C) Clinical trial
D) Laboratory experiment
Correct Answer: B) Cross-sectional study
Rationale: Cross-sectional studies are a type of observational research that examine the
relationship between exposures and outcomes at a single point in time. Unlike experimental
studies (randomized controlled trials, clinical trials), observational studies do not involve
intervention .
