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HESI RN · HESI Community Health Nursing · Epidemiology Test Questions and Answers PDF

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

Explain the purposes of blinding and randomization in clinical trials.

A. Blinding ensures participants know their treatment group; randomization guarantees equal group sizes.
B. Blinding prevents bias from knowledge of treatment; randomization balances confounding factors across groups.
C. Blinding is only used for placebo-controlled trials; randomization is optional.
D. Blinding and randomization are irrelevant in modern trials.

Expert Explanatory Rationale

Correct Answer: Blinding prevents bias from knowledge of treatment; randomization balances confounding factors across groups.

Question 2 of 5

Which of the following statements about alcoholism is true?

A. There are about 30 million alcoholics in the U.S.
B. About 10 percent of the population consumes 95 percent of the alcohol
C. The incidence of alcoholism is highest among college graduates
D. None of the above

Expert Explanatory Rationale

Correct Answer: None of the above

Question 3 of 5

Govt. of Nepal formulated the Drug act in:

A. 1978
B. 1988
C. 1976
D. 1986

Expert Explanatory Rationale

Correct Answer: 1978

Question 4 of 5

The term 'etiology' refers to:

A. The symptoms of a disease
B. The cause of a disease
C. The treatment of a disease
D. The prevention of a disease

Expert Explanatory Rationale

Correct Answer: The cause of a disease

Question 5 of 5

A woman is sitting in a corner of the clinical waiting room, crying audibly. The nurse asks, “What’s wrong? Can I help?” The woman responds, “They just told me I have a positive mammogram and I need to see my doctor for follow-up tests. I know I’m going to die of cancer. How can I tell my family?” Which of the following information does the nurse need to know in order to help the woman cope with this finding?

A. The negative predictive value of mammography
B. The positive predictive value of mammography
C. The reliability of mammography
D. The validity of mammography

Expert Explanatory Rationale

Correct Answer: The positive predictive value of mammography

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