ATI RN
Descriptive Epidemiology Questions Questions
Question 1 of 5
What type of study design involves observing a population at a single point in time?
Correct Answer: C
Rationale: Cross-sectional studies (C) snapshot data at one time (e.g., surveys). A is retrospective, B is longitudinal, D is experimental.
Question 2 of 5
The principle of 'beneficence' in research ethics refers to:
Correct Answer: C
Rationale: Beneficence (C) maximizes benefits and minimizes harm (e.g., risk-benefit balance). A is autonomy, B is non-maleficence, D is justice.
Question 3 of 5
Which of the following statements is true about a highly sensitive test?
Correct Answer: C
Rationale: High sensitivity (C) rules out disease (e.g., few false negatives, SnNout). A is specificity, B may occur, D contradicts high sensitivity.
Question 4 of 5
What is the primary disadvantage of using a highly specific test for screening purposes?
Correct Answer: A
Rationale: High specificity (A) may miss cases (low sensitivity) in screening. B is low specificity, C and D are not primary.
Question 5 of 5
How is 'mortality rate' defined?
Correct Answer: C
Rationale: Mortality rate (C) is deaths over time (e.g., 2/1000/year). A is incidence, B is prevalence, D is recovery.