ATI RN
Epidemiology Exam Questions Questions
Question 1 of 5
The epidemiological triad includes all of the following EXCEPT:
Correct Answer: C
Rationale: The epidemiological triad is host (A), agent (B), and environment (C). Pathogen (D) is a type of agent, not a separate component.
Question 2 of 5
What type of bias occurs when the outcome influences the exposure classification?
Correct Answer: B
Rationale: Information bias (B) includes misclassification influenced by outcome knowledge (e.g., recall bias in cases). A is selection, C is specific recall, D is confounding.
Question 3 of 5
Which study design is often used to investigate the cause of a rare disease?
Correct Answer: B
Rationale: Case-control studies (B) suit rare diseases (e.g., cancer) by starting with cases. A is better for common outcomes, C for prevalence, D for trials.
Question 4 of 5
In a case-control study, what is the main outcome measure?
Correct Answer: C
Rationale: Case-control studies use odds ratio (C) to measure association (e.g., odds of exposure in cases vs. controls). A and D are cohort measures, B is cross-sectional.
Question 5 of 5
What is the main strength of a cross-sectional study?
Correct Answer: C
Rationale: Cross-sectional studies (C) are quick and cost-effective (e.g., prevalence surveys). A, B, and D are false.