ATI RN
Epidemiology Test Questions and Answers PDF Questions
Question 1 of 5
Sensitivity of a diagnostic test is defined as:
Correct Answer: B
Rationale: Sensitivity (B) is true positives / (true positives + false negatives), detecting diseased (e.g., 90% sensitivity = 90% of sick identified). A is specificity, C is PPV, D is an error.
Question 2 of 5
An example of secondary prevention in infectious diseases is:
Correct Answer: C
Rationale: Quarantine (C) isolates early cases (secondary). A and D are primary, B is treatment.
Question 3 of 5
What does the term 'confounder' refer to in epidemiology?
Correct Answer: A
Rationale: Confounder (A) affects exposure-outcome links (e.g., age). B is error, C is bias, D is a response.
Question 4 of 5
True statements about complications of appendicitis include all the following EXCEPT
Correct Answer: C
Rationale: A and B reflect higher perforation at age extremes. D and E align with surgical outcomes. C is false—leukocytosis indicates severity, not perforation risk directly.
Question 5 of 5
The parameter that can be used to obtain the best estimate of the prevalence of dental caries is
Correct Answer: C
Rationale: DMF rate directly measures caries prevalence.