ATI RN
Questions in Epidemiology Questions
Question 1 of 5
Which of the following is NOT a type of observational study?
Correct Answer: D
Rationale: RCTs (D) are experimental, not observational. A, B, and C observe natural events without intervention.
Question 2 of 5
In an observational study, the researcher:
Correct Answer: C
Rationale: Observational studies (C) observe natural events without intervention (e.g., smoking studies). A, B, and D are experimental.
Question 3 of 5
What type of study design is best suited for studying the natural history of a disease?
Correct Answer: C
Rationale: Cohort studies (C) follow disease progression over time (e.g., HIV stages). A is snapshot, B is retrospective, D is interventional.
Question 4 of 5
Which type of study design is best suited for studying the prevalence of a disease?
Correct Answer: C
Rationale: Cross-sectional studies (C) measure prevalence (e.g., diabetes rates). A and B focus on associations, D on interventions.
Question 5 of 5
What type of bias occurs when the measurement of exposure or outcome is influenced by the knowledge of the hypothesis?
Correct Answer: D
Rationale: Observer bias (D) arises when hypothesis knowledge skews measurement (e.g., biased scoring). A is selection, B is broad, C is recall-specific.