,NSG3480/NSG 3480 Exam 2 | Advanced Nursing
Concepts | Galen College | Q & A | 2026/2027
Edition (PDF)
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: The study of the distribution and determinants of health and disease in human
populations
Rationale: Epidemiology is the study of the distribution and determinants of health and disease in
human populations. It provides the scientific foundation for community health nursing by identifying
patterns, causes, and risk factors of health problems. Clinical treatment and healthcare administration
are not the focus of epidemiology.
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: Agent, host, and environment
Rationale: The epidemiological triangle consists of three elements: agent (the actual cause of disease),
host (the carrier of disease), and environment (any outside factors). Person, place, and time are
components of descriptive epidemiology, not the triangle itself.
3. According to the epidemiological triangle, which component represents the actual cause of disease?
,A) Host
B) Agent
C) Environment
D) Vector
Correct Answer: Agent
Rationale: In the epidemiological triangle, the agent is the actual cause of disease. The agent can be
biological, chemical, or physical in nature. The host is the carrier of disease, and the environment
includes any outside factors that influence disease transmission.
4. Which model of disease causation is most useful for analyzing complex chronic conditions and
identifying factors amenable to nursing intervention?
A) Epidemiological triangle
B) Wheel model
C) Web of causation
D) Germ theory
Correct Answer: Wheel model
Rationale: The wheel model subscribes to multiple-causation disease theory and is more useful for
analyzing complex chronic conditions and identifying factors that are amenable to nursing intervention.
The web of causation is better at showing relationships among variables, while the triangle is simpler.
5. What is the primary difference between incidence rate and prevalence rate?
A) Incidence measures new cases; prevalence measures all existing cases
B) Incidence measures all cases; prevalence measures new cases only
C) Incidence measures mortality; prevalence measures morbidity
D) Incidence measures disease severity; prevalence measures disease duration
, Correct Answer: Incidence measures new cases; prevalence measures all existing cases
Rationale: Incidence rates describe the occurrence of new cases of a disease or condition in a
community. Prevalence rate is the number of all cases of a specific disease or condition in a population
at a given point in time. Incidence reflects risk, while prevalence reflects the total disease burden.
6. 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: Meaningful comparison
Rationale: The community 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.
7. 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: 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).
Concepts | Galen College | Q & A | 2026/2027
Edition (PDF)
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: The study of the distribution and determinants of health and disease in human
populations
Rationale: Epidemiology is the study of the distribution and determinants of health and disease in
human populations. It provides the scientific foundation for community health nursing by identifying
patterns, causes, and risk factors of health problems. Clinical treatment and healthcare administration
are not the focus of epidemiology.
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: Agent, host, and environment
Rationale: The epidemiological triangle consists of three elements: agent (the actual cause of disease),
host (the carrier of disease), and environment (any outside factors). Person, place, and time are
components of descriptive epidemiology, not the triangle itself.
3. According to the epidemiological triangle, which component represents the actual cause of disease?
,A) Host
B) Agent
C) Environment
D) Vector
Correct Answer: Agent
Rationale: In the epidemiological triangle, the agent is the actual cause of disease. The agent can be
biological, chemical, or physical in nature. The host is the carrier of disease, and the environment
includes any outside factors that influence disease transmission.
4. Which model of disease causation is most useful for analyzing complex chronic conditions and
identifying factors amenable to nursing intervention?
A) Epidemiological triangle
B) Wheel model
C) Web of causation
D) Germ theory
Correct Answer: Wheel model
Rationale: The wheel model subscribes to multiple-causation disease theory and is more useful for
analyzing complex chronic conditions and identifying factors that are amenable to nursing intervention.
The web of causation is better at showing relationships among variables, while the triangle is simpler.
5. What is the primary difference between incidence rate and prevalence rate?
A) Incidence measures new cases; prevalence measures all existing cases
B) Incidence measures all cases; prevalence measures new cases only
C) Incidence measures mortality; prevalence measures morbidity
D) Incidence measures disease severity; prevalence measures disease duration
, Correct Answer: Incidence measures new cases; prevalence measures all existing cases
Rationale: Incidence rates describe the occurrence of new cases of a disease or condition in a
community. Prevalence rate is the number of all cases of a specific disease or condition in a population
at a given point in time. Incidence reflects risk, while prevalence reflects the total disease burden.
6. 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: Meaningful comparison
Rationale: The community 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.
7. 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: 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).
