ATI RN
Questions on Epidemiology Questions
Question 1 of 5
The term 'prevalence' refers to:
Correct Answer: B
Rationale: Prevalence (B) is total cases at a time (e.g., diabetes prevalence). A is incidence, C is mortality, D is at-risk population.
Question 2 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 3 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 4 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.
Question 5 of 5
Which of the following is an example of information bias?
Correct Answer: B
Rationale: Information bias (B) includes misclassification of disease or exposure (e.g., wrong diagnosis). A and C are selection biases, D is confounding.