ARIZONA EPIDEMIOLOGY SPECIALIST EXAM
QUESTIONS WITH CORRECT ANSWERS AND
RATIONALES LATEST 2025-2026 UPDATE
Question 1
What is the primary purpose of epidemiology?
A. Treat individual patients
B. Study disease distribution and determinants in populations
C. Develop pharmaceuticals
D. Perform laboratory testing
Correct Answer: B
Rationale: Epidemiology focuses on the distribution and determinants
of health-related events in populations and applies this knowledge to
disease prevention and control.
Question 2
Which measure represents the number of new cases of a disease
occurring in a population during a specified period?
A. Prevalence
B. Mortality rate
C. Incidence
D. Attack rate
Correct Answer: C
Rationale: Incidence measures newly occurring cases within a specified
time frame.
,Question 3
Prevalence refers to:
A. New cases only
B. Existing cases at a specific time or period
C. Deaths due to disease
D. Exposed individuals only
Correct Answer: B
Rationale: Prevalence includes all existing cases of a disease within a
population.
Question 4
Which study design is best for investigating rare diseases?
A. Cohort study
B. Randomized trial
C. Case-control study
D. Ecological study
Correct Answer: C
Rationale: Case-control studies begin with diseased individuals and are
efficient for studying rare diseases.
Question 5
A cohort study typically begins with:
, A. Cases and controls
B. Exposed and unexposed groups
C. Random samples of hospitals
D. Laboratory specimens
Correct Answer: B
Rationale: Cohort studies compare disease occurrence between exposed
and unexposed populations.
Question 6
What is the epidemiologic triad?
A. Host, Agent, Environment
B. Disease, Treatment, Cure
C. Time, Place, Person
D. Incidence, Prevalence, Mortality
Correct Answer: A
Rationale: The epidemiologic triad describes interactions among host,
agent, and environment.
Question 7
Which measure is calculated as:
Cases ÷ Population at Risk × 100,000?
A. Relative risk
B. Rate
C. Odds ratio
D. Attributable risk
QUESTIONS WITH CORRECT ANSWERS AND
RATIONALES LATEST 2025-2026 UPDATE
Question 1
What is the primary purpose of epidemiology?
A. Treat individual patients
B. Study disease distribution and determinants in populations
C. Develop pharmaceuticals
D. Perform laboratory testing
Correct Answer: B
Rationale: Epidemiology focuses on the distribution and determinants
of health-related events in populations and applies this knowledge to
disease prevention and control.
Question 2
Which measure represents the number of new cases of a disease
occurring in a population during a specified period?
A. Prevalence
B. Mortality rate
C. Incidence
D. Attack rate
Correct Answer: C
Rationale: Incidence measures newly occurring cases within a specified
time frame.
,Question 3
Prevalence refers to:
A. New cases only
B. Existing cases at a specific time or period
C. Deaths due to disease
D. Exposed individuals only
Correct Answer: B
Rationale: Prevalence includes all existing cases of a disease within a
population.
Question 4
Which study design is best for investigating rare diseases?
A. Cohort study
B. Randomized trial
C. Case-control study
D. Ecological study
Correct Answer: C
Rationale: Case-control studies begin with diseased individuals and are
efficient for studying rare diseases.
Question 5
A cohort study typically begins with:
, A. Cases and controls
B. Exposed and unexposed groups
C. Random samples of hospitals
D. Laboratory specimens
Correct Answer: B
Rationale: Cohort studies compare disease occurrence between exposed
and unexposed populations.
Question 6
What is the epidemiologic triad?
A. Host, Agent, Environment
B. Disease, Treatment, Cure
C. Time, Place, Person
D. Incidence, Prevalence, Mortality
Correct Answer: A
Rationale: The epidemiologic triad describes interactions among host,
agent, and environment.
Question 7
Which measure is calculated as:
Cases ÷ Population at Risk × 100,000?
A. Relative risk
B. Rate
C. Odds ratio
D. Attributable risk
