ATI RN
Epidemiology Test Questions and Answers PDF Questions
Question 1 of 5
Which of the following statements correctly describes emotional disturbances of the postpartum period?
Correct Answer: D
Rationale: ~20% experience blues/depression; others false.
Question 2 of 5
Indirect transmission includes which of the following? (Choose one wrong answer)
Correct Answer: A
Rationale: Indirect transmission involves vectors (B), vehicles (C), or fomites (D). Droplet spread (A) is direct, making it the wrong answer.
Question 3 of 5
The measure of central location most commonly used with the standard deviation is the:
Correct Answer: A
Rationale: The mean is used with standard deviation in normal distribution analyses.
Question 4 of 5
To study the causes of an outbreak of aflatoxin poisoning in Africa, investigators conducted a case-control study with 40 case-patients and 80 controls. Among the 40 poisoning victims, 32 reported storing their maize inside rather than outside. Among the 80 controls, 20 stored their maize inside. The resulting odds ratio for the association between inside storage of maize and illness is:
Correct Answer: C
Rationale: Odds ratio = (32/8) / (20/60) = 4 / (1/3) = 12, indicating a strong association.
Question 5 of 5
A spot map must reflect numbers; an area map must reflect rates.
Correct Answer: B
Rationale: Spot maps show case numbers by location; area maps can show rates or numbers.