ATI RN
Epidemiologic Question Questions
Question 1 of 5
Which term describes the occurrence of more cases of a disease than expected in a given area or among a specific group of people?
Correct Answer: B
Rationale: Epidemic (B) is excess cases beyond expected (e.g., flu outbreak). A is normal, C is global, D is occasional.
Question 2 of 5
Which of the following is a limitation of cross-sectional studies?
Correct Answer: C
Rationale: Cross-sectional studies (C) can’t determine causality due to simultaneous exposure-outcome measurement. A, B, and D may apply but aren’t primary.
Question 3 of 5
Which of the following best describes a cross-sectional study?
Correct Answer: C
Rationale: Cross-sectional studies (C) survey at one time (e.g., prevalence snapshot). A is cohort, B is case-control, D is RCT.
Question 4 of 5
In a case-control study, the control group consists of individuals who:
Correct Answer: B
Rationale: Controls (B) in case-control studies lack the disease for comparison. A is cases, C and D confuse exposure status.
Question 5 of 5
Which of the following is an example of selection bias?
Correct Answer: B
Rationale: Selection bias occurs when participant selection distorts exposure-outcome relationships, but B (misclassification) is information bias. A (loss to follow-up) is attrition bias, often considered a form of selection bias in cohorts, yet the answer key lists B. C and D are recall and observer biases. The key may be incorrect; A aligns better with selection bias.