ATI RN
130 Top Epidemiology Multiple Choice Questions and Answers PDF Questions
Question 1 of 5
Which of the following statements about exposures is true?
Correct Answer: A
Rationale: In epidemiology, 'exposure' is any factor (e.g., smoking, diet, BMI) that may influence health, positively or negatively (A), making it true. B assumes all exposures increase risk, which isn’t always true (e.g., exercise reduces risk). C is false; dietary intake is an exposure despite being a choice. D is false; BMI is a single exposure linked to multiple outcomes.
Question 2 of 5
What type of study design involves following a group of individuals over time to see who develops a disease?
Correct Answer: B
Rationale: Cohort studies (B) follow groups over time to track disease development (e.g., Framingham Study). A is snapshot, C is retrospective, D is experimental.
Question 3 of 5
The concept of 'excess mortality' refers to:
Correct Answer: A
Rationale: Excess mortality (A) is deaths above expected (e.g., during a pandemic). B, C, and D are broader or specific counts.
Question 4 of 5
What is the main purpose of a control group in a case-control study?
Correct Answer: A
Rationale: Controls (A) in case-control studies compare exposure in non-diseased to diseased. B is trials, C and D are cohort/cross-sectional aims.
Question 5 of 5
In a cohort study, the exposure status is determined:
Correct Answer: A
Rationale: Cohort studies (A) define exposure at baseline (e.g., smokers vs. non-smokers) then follow outcomes. B, C, and D misalign with design.