ATI RN
Epidemiology Multiple Choice Questions Questions
Question 1 of 5
In a case-control study, what is the purpose of matching cases and controls?
Correct Answer: C
Rationale: Matching (C) controls confounders (e.g., age, sex) in case-control studies. A, B, and D are unrelated or incorrect.
Question 2 of 5
In a cohort study, the participants are selected based on their:
Correct Answer: B
Rationale: Cohort studies (B) select based on exposure (e.g., smokers vs. non-smokers). A is case-control, C and D are variables, not criteria.
Question 3 of 5
What is the primary limitation of a case-control study?
Correct Answer: C
Rationale: Case-control studies (C) risk recall bias from retrospective data (e.g., memory errors). A, B, and D are less primary.
Question 4 of 5
Which type of bias occurs when the selection of participants into a study is related to both the exposure and the outcome?
Correct Answer: A
Rationale: Selection bias (A) occurs when entry relates to exposure and outcome (e.g., hospital-based controls). B is data error, C is recall, D is confounding.
Question 5 of 5
When a researcher deceives participants about the true nature of a study, they must:
Correct Answer: D
Rationale: Deception requires all (D): necessity (A), debriefing (B), and ethics approval (C) (e.g., Milgram’s study).