NSG 221 Final Review Exam 2026
Questions and Answers
Analytic Epidemiology - Correct answer-method that investigates the causes of
disease by determining why a disease rate is lower in one population group than in
another
Descriptive Epidemiology - Correct answer-a form of epidemiology that describes
a disease according to its person, place, or time
Web of Causation - Correct answer-a model that can be used to illustrate complex
interrelationships of factors interacting with each other to influence the risk for, or
distribution of, health outcomes
Screening Programs - Correct answer-a secondary prevention activity that
identifies risk factors and diseases in their earliest stages
Surveillance - Correct answer-A mechanism for the ongoing collection of health
information in a community
Host-Agent-Environment - Correct answer-Epidemiological triangle model
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, Host - Correct answer-a living human or animal organism in which an infectious
agent can exist under natural conditions
Agent - Correct answer-causative factor invading a susceptible host through an
environment favorable to produce disease, such as biological or chemical agent
Environment - Correct answer-the accumulation of physical, social, cultural,
economic, and political conditions that influence the lives of communities (Chapter
14); that which surrounds the human host and where transmission of an infectious
agent is occurring
Rates - Correct answer-arithmetic expressions that allow one to consider a count of
an event relative to the size of the population from which it is extracted
Incidence Rates - Correct answer-rates that describe the occurrence of new cases of
disease or condition (e.g., teen pregnancy) in a community over a period of time,
relative to the size of the population at risk for that disease or condition during that
same period
Prevalence Rate - Correct answer-the number of all cases of a specific disease or
condition (e.g., deafness) in a population at a given point in time, relative to the
population at the same point in time
©COPYRIGHT 2025, ALL RIGHTS RESERVE 2
Questions and Answers
Analytic Epidemiology - Correct answer-method that investigates the causes of
disease by determining why a disease rate is lower in one population group than in
another
Descriptive Epidemiology - Correct answer-a form of epidemiology that describes
a disease according to its person, place, or time
Web of Causation - Correct answer-a model that can be used to illustrate complex
interrelationships of factors interacting with each other to influence the risk for, or
distribution of, health outcomes
Screening Programs - Correct answer-a secondary prevention activity that
identifies risk factors and diseases in their earliest stages
Surveillance - Correct answer-A mechanism for the ongoing collection of health
information in a community
Host-Agent-Environment - Correct answer-Epidemiological triangle model
©COPYRIGHT 2025, ALL RIGHTS RESERVE 1
, Host - Correct answer-a living human or animal organism in which an infectious
agent can exist under natural conditions
Agent - Correct answer-causative factor invading a susceptible host through an
environment favorable to produce disease, such as biological or chemical agent
Environment - Correct answer-the accumulation of physical, social, cultural,
economic, and political conditions that influence the lives of communities (Chapter
14); that which surrounds the human host and where transmission of an infectious
agent is occurring
Rates - Correct answer-arithmetic expressions that allow one to consider a count of
an event relative to the size of the population from which it is extracted
Incidence Rates - Correct answer-rates that describe the occurrence of new cases of
disease or condition (e.g., teen pregnancy) in a community over a period of time,
relative to the size of the population at risk for that disease or condition during that
same period
Prevalence Rate - Correct answer-the number of all cases of a specific disease or
condition (e.g., deafness) in a population at a given point in time, relative to the
population at the same point in time
©COPYRIGHT 2025, ALL RIGHTS RESERVE 2
