ATI RN
Epidemiology Practice Questions Questions
Question 1 of 5
What proportion of the United States population is estimated to have a mental or emotional problem that requires therapy?
Correct Answer: D
Rationale: ~20% lifetime prevalence per NIMH.
Question 2 of 5
Epidemiology, as defined in this lesson, would include which of the following activities? (Choose one wrong answer)
Correct Answer: B
Rationale: Epidemiology involves describing disease patterns (A) and analyzing risk factors (C). Prescribing antibiotics (B) is a clinical task, not an epidemiological one.
Question 3 of 5
A cohort study differs from a case-control study in that: (Choose one wrong answer)
Correct Answer: B
Rationale: Cohort studies start with exposure (A), unlike case-control’s outcome focus. Both ask about exposure (B is wrong), and C and D are not universally true.
Question 4 of 5
Which of the following are considered measures of spread? (Choose one wrong answer)
Correct Answer: B
Rationale: IQR (A), range (C), and standard deviation (D) measure spread. Percentiles (B) indicate position, not spread.
Question 5 of 5
What is the following fraction? Number of children <365 days of age who died in Country A in 2004 / Number of live births in Country A in 2004
Correct Answer: D
Rationale: This fraction is the infant mortality rate, a specific type of mortality rate.