NR 442 WEEK 6 ELO: INTERACTIVE EXERCISE –
EPIDEMIOLOGY
ELO: Interactive Exercise: Epidemiology
1. Define epidemiology.
Epidemiology is what is used to find the causes of health outcomes and diseases in populations.
In epidemiology, the patient is the community. It is the study (scientific, systematic, and data-
driven) of the distribution (frequency, pattern) and determinants (causes, risk factors) of health-
related states and events (not just diseases) in specified populations (neighborhood, school, city,
state, country, global).
2. There are two principal types of epidemiology: (1) analytic epidemiology and (2) descriptive
epidemiology. Describe each.
Descriptive epidemiology deals with the frequency and the distribution of risk factors in
populations to assess the extent of a disease. Analytical epidemiology is the research and study
of the risks and protector factors of diseases.
, 3. Explain the epidemiological triangle model of agent-host-environment, Wheel Model and the
web of causation model.
Epidemiologic Triad
The triad consists of an external agent, a host, and an environment that brings everything
together. Disease results from the interaction between the agent and the host in an environment
that supports transmission of the agent from a source to that host.
The wheel model is epidemiologic model that de-emphasizes the agent as the sole cause of
disease while emphasizing the interplay of physical, biologic, and social environments
EPIDEMIOLOGY
ELO: Interactive Exercise: Epidemiology
1. Define epidemiology.
Epidemiology is what is used to find the causes of health outcomes and diseases in populations.
In epidemiology, the patient is the community. It is the study (scientific, systematic, and data-
driven) of the distribution (frequency, pattern) and determinants (causes, risk factors) of health-
related states and events (not just diseases) in specified populations (neighborhood, school, city,
state, country, global).
2. There are two principal types of epidemiology: (1) analytic epidemiology and (2) descriptive
epidemiology. Describe each.
Descriptive epidemiology deals with the frequency and the distribution of risk factors in
populations to assess the extent of a disease. Analytical epidemiology is the research and study
of the risks and protector factors of diseases.
, 3. Explain the epidemiological triangle model of agent-host-environment, Wheel Model and the
web of causation model.
Epidemiologic Triad
The triad consists of an external agent, a host, and an environment that brings everything
together. Disease results from the interaction between the agent and the host in an environment
that supports transmission of the agent from a source to that host.
The wheel model is epidemiologic model that de-emphasizes the agent as the sole cause of
disease while emphasizing the interplay of physical, biologic, and social environments
