ATI RN
Epidemiology Questions Questions
Question 1 of 5
What is the main purpose of a descriptive study?
Correct Answer: B
Rationale: Descriptive studies (B) describe disease patterns (e.g., who, where, when). A and C are analytical, D is clinical.
Question 2 of 5
What type of study design is often used to examine the association between a risk factor and a rare disease?
Correct Answer: B
Rationale: Case-control studies (B) suit rare diseases (e.g., mesothelioma) by focusing on cases. A, C, and D are less efficient.
Question 3 of 5
What is confounding?
Correct Answer: C
Rationale: Confounding (C) distorts exposure-outcome links via a third variable (e.g., age in smoking-cancer studies). A and B are biases, D is random error.
Question 4 of 5
What type of bias is introduced when participants drop out of a study and the dropout is related to both the exposure and the outcome?
Correct Answer: D
Rationale: Attrition bias (D) is loss to follow-up affecting results (e.g., sick dropouts in cohorts). A is broader, B is data error, C is recall.
Question 5 of 5
What is the primary purpose of obtaining informed consent from research participants?
Correct Answer: C
Rationale: Informed consent (C) upholds autonomy (e.g., voluntary choice). A, B, and D are secondary or incorrect.