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HESI RN · HESI Community Health Nursing · Epidemiology Questions

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

What is confounding?

A. A type of selection bias

B. A type of information bias

C. A distortion of the association between exposure and outcome due to a third variable

D. A random error in measurement

Correct Answer: A distortion of the association between exposure and outcome due to a third variable

Question 2 of 5

What type of epidemiological study involves comparing individuals with a disease to those without the disease?

A. Cross-sectional study

B. Cohort study

C. Case-control study

D. Randomized controlled trial

Correct Answer: Case-control study

Question 3 of 5

MDG stands for

A. Millennium Development Goals

B. mild development goals

C. Both a and b

D. none

Correct Answer: Millennium Development Goals

Question 4 of 5

A study in which children are randomly assigned to receive either a new vaccine or the current vaccine is an example of which type of study?

A. Experimental

B. Observational

C. Cohort

D. Case-control

Correct Answer: Experimental

Question 5 of 5

Vaccine efficacy measures are: (Choose one wrong answer)

A. The proportion of vaccinees who do not get the disease

B. 1 - the attack rate among vaccinees

C. The proportionate reduction in disease among vaccinees

D. 1 - disease attributable to the vaccine

Correct Answer: The proportionate reduction in disease among vaccinees

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