ATI RN
Epidemiology Exam Questions Questions
Question 1 of 5
What is the purpose of using a receiver operating characteristic (ROC) curve in diagnostic testing?
Correct Answer: B
Rationale: ROC curves (B) plot sensitivity vs. 1-specificity to assess discrimination (e.g., test accuracy). A, C, and D are unrelated.
Question 2 of 5
What is 'case fatality rate'?
Correct Answer: A
Rationale: Case fatality rate (A) is deaths among cases (e.g., 10% for Ebola). B is incidence, C is mortality, D is at-risk.
Question 3 of 5
What does a dose-response relationship indicate in epidemiology?
Correct Answer: C
Rationale: Dose-response (C) shows risk rising with exposure (e.g., more smoking, more cancer). A, B, and D misinterpret.
Question 4 of 5
Which of the following bacteria is the most common cause of bacterial meningitis in children 3 months to 6 years of age in the United States?
Correct Answer: A
Rationale: Post-Hib vaccine, S. pneumoniae leads in this age group.
Question 5 of 5
Overconsumption of refined sugar has been shown to cause
Correct Answer: D
Rationale: Sugar contributes to obesity indirectly; no direct causation for B-D.