ATI RN
Questions on Epidemiology Questions
Question 1 of 5
Which of the following is NOT a component of the epidemiological triad?
Correct Answer: C
Rationale: The triad is host (A), agent (B), and environment (D). Vector (C) is a transmission mode, not a core component.
Question 2 of 5
Which of the following is an example of a chronic disease?
Correct Answer: C
Rationale: Diabetes (C) is chronic, lasting long-term. Influenza (A) and measles (D) are acute, TB (B) can be chronic but is treatable.
Question 3 of 5
Which study design is often used to examine the association between exposure and outcome in a population over time?
Correct Answer: C
Rationale: Cohort studies (C) track exposure-outcome associations over time (e.g., diet and heart disease). A is snapshot, B is retrospective, D is experimental.
Question 4 of 5
Which of the following is a limitation of cohort studies?
Correct Answer: C
Rationale: Cohort studies (C) are lengthy and costly (e.g., decades for cancer studies). A and B occur, D is false as they can suggest causality.
Question 5 of 5
What is the primary limitation of a cross-sectional study?
Correct Answer: A
Rationale: Cross-sectional studies (A) can’t establish causality due to simultaneous data collection. B, C, and D are secondary.