ATI RN
Questions on Epidemiology Questions
Question 1 of 5
Which of the following represents a high positive predictive value?
Correct Answer: C
Rationale: PPV (C) rises with prevalence (e.g., more true positives in high-prevalence settings). A and B help, D lowers PPV.
Question 2 of 5
What does the term 'incidence rate' refer to?
Correct Answer: B
Rationale: Incidence rate (B) is new cases over time (e.g., 10/1000/year). A is prevalence, C is mortality, D is denominator.
Question 3 of 5
What is the primary purpose of conducting a multivariate analysis in epidemiological studies?
Correct Answer: B
Rationale: Multivariate analysis (B) adjusts for confounders (e.g., regression). A is descriptive, C is a byproduct, D is cross-sectional.
Question 4 of 5
Giardiasis occurs on a worldwide basis and is associated with all the following EXCEPT
Correct Answer: D
Rationale: Giardia affects small intestine, not colonic mucosa (D false). A, B, C, and E are true.
Question 5 of 5
Studies of coronary artery bypass grafting have shown that all the following are true EXCEPT
Correct Answer: C
Rationale: Mortality is ~1-3%, higher with poor LV function; 1% is too specific.