Question 1: The nurse is formulating a clinical question using the PICOT format. Which
of the following is the "C" in PICOT?
A. Control
B. Comparison
C. Clinical condition
D. Cost
CORRECT ANSWER: B. Comparison.
Rationale: PICOT stands for Population, Intervention, Comparison, Outcome, and
Time. The "C" represents the comparison group or intervention.
Question 2: A nurse is reviewing a research study. The nurse notes that the study has a
high level of evidence. Which type of study design provides the highest level of evidence
for a therapy question?
A. Case-control study
B. Systematic review and meta-analysis of randomized controlled trials (RCTs)
C. Cohort study
D. Case series
CORRECT ANSWER: B. Systematic review and meta-analysis of randomized
controlled trials (RCTs).
Rationale: In the hierarchy of evidence for therapy questions, systematic reviews and
meta-analyses of RCTs are at the top, providing the strongest evidence.
Question 3: A nurse is searching for evidence to guide a change in practice. The nurse
understands that the "gold standard" for research design to test a cause-and-e ect
relationship is:
A. A descriptive study
B. A case study
C. A randomized controlled trial (RCT)
D. A qualitative study
CORRECT ANSWER: C. A randomized controlled trial (RCT).
Rationale: RCTs are considered the gold standard for clinical research because
randomization reduces bias and allows for the determination of causal relationships.
,Question 4: The nurse is critically appraising a research article. Which question is most
important to ask when evaluating the validity of a study?
A. Was the sample size large enough to detect a di erence?
B. What was the impact factor of the journal?
C. Did the study have a control group?
D. Are the results clinically significant?
CORRECT ANSWER: A. Was the sample size large enough to detect a di erence?
Rationale: A small sample size may not have enough power to detect a statistically or
clinically significant di erence, making the study's findings unreliable.
Question 5: A nurse is implementing an evidence-based practice (EBP) change. The
nurse understands that the first step in the EBP process is:
A. Appraising the evidence.
B. Asking a clinical question.
C. Implementing the change.
D. Evaluating the outcome.
CORRECT ANSWER: B. Asking a clinical question.
Rationale: The EBP process begins with asking a clinical question, typically in the
PICOT format, to identify a gap in knowledge.
Question 6: The nurse is evaluating the strength of a body of evidence for a clinical
practice guideline. Which of the following is a key component of "Level of Evidence"?
A. The number of citations in the article.
B. The author's credentials.
C. The study design and quality.
D. The year of publication.
CORRECT ANSWER: C. The study design and quality.
Rationale: The level of evidence is primarily determined by the study design (e.g., RCT
vs. case report) and the methodological quality of the research.
Question 7: A nurse is reading a systematic review. The nurse understands that a
systematic review is di erent from a literature review because a systematic review:
,A. Is written by a single author.
B. Uses a comprehensive, rigorous, and explicit methodology.
C. Is shorter in length.
D. Does not include an abstract.
CORRECT ANSWER: B. Uses a comprehensive, rigorous, and explicit methodology.
Rationale: A systematic review uses a structured, explicit methodology to identify,
select, and critically appraise relevant research, minimizing bias.
Question 8: The nurse is using a clinical practice guideline (CPG) to inform patient care.
The nurse understands that a CPG is:
A. A mandatory order from the hospital administration.
B. A set of systematically developed statements to assist practitioner and patient
decisions.
C. A legal document that must be followed exactly.
D. An individual nurse's opinion on best practice.
CORRECT ANSWER: B. A set of systematically developed statements to assist
practitioner and patient decisions.
Rationale: Clinical practice guidelines are evidence-based recommendations designed
to assist clinicians and patients in making decisions about appropriate healthcare.
Question 9: A nurse is conducting a literature search. The nurse wants to find the
highest level of evidence to answer a therapy question. Which database is most
appropriate to search?
A. MEDLINE/PubMed
B. CINAHL
C. The Cochrane Database of Systematic Reviews
D. PsycINFO
CORRECT ANSWER: C. The Cochrane Database of Systematic Reviews.
Rationale: The Cochrane Library is a collection of databases that contain high-quality,
systematic reviews and meta-analyses, which provide the highest level of evidence for
therapy questions.
Question 10: A nurse is assessing the applicability of a research study to a specific
patient population. The nurse should consider which factor?
, A. The study's sample size.
B. The statistical significance of the findings.
C. Whether the study subjects are similar to the patient population.
D. The impact factor of the journal.
CORRECT ANSWER: C. Whether the study subjects are similar to the patient
population.
Rationale: Applicability (or generalizability) depends on whether the study's population
is similar to the patient(s) the nurse is caring for.
Question 11: A nurse is evaluating a research article. The nurse notes that the study has
a "p-value" of 0.04. What does this result indicate?
A. There is a 4% chance that the results are due to chance.
B. The results are not statistically significant.
C. The results are clinically significant.
D. There is a 96% chance the results are due to chance.
CORRECT ANSWER: A. There is a 4% chance that the results are due to chance.
Rationale: A p-value of 0.04 (less than 0.05) means there is less than a 5% probability
that the observed results are due to chance, indicating statistical significance.
Question 12: A nurse is using the "PICOT" framework to search for evidence. Which of
the following is an example of an "Outcome" in PICOT?
A. Patients with heart failure.
B. A low-sodium diet.
C. A reduction in blood pressure.
D. Usual care.
CORRECT ANSWER: C. A reduction in blood pressure.
Rationale: The Outcome is what the nurse wants to measure or achieve (e.g., a
reduction in blood pressure).
Question 13: The nurse is reading a qualitative research study. The purpose of
qualitative research is to:
A. Test a hypothesis.
B. Understand the meaning of human experiences.
of the following is the "C" in PICOT?
A. Control
B. Comparison
C. Clinical condition
D. Cost
CORRECT ANSWER: B. Comparison.
Rationale: PICOT stands for Population, Intervention, Comparison, Outcome, and
Time. The "C" represents the comparison group or intervention.
Question 2: A nurse is reviewing a research study. The nurse notes that the study has a
high level of evidence. Which type of study design provides the highest level of evidence
for a therapy question?
A. Case-control study
B. Systematic review and meta-analysis of randomized controlled trials (RCTs)
C. Cohort study
D. Case series
CORRECT ANSWER: B. Systematic review and meta-analysis of randomized
controlled trials (RCTs).
Rationale: In the hierarchy of evidence for therapy questions, systematic reviews and
meta-analyses of RCTs are at the top, providing the strongest evidence.
Question 3: A nurse is searching for evidence to guide a change in practice. The nurse
understands that the "gold standard" for research design to test a cause-and-e ect
relationship is:
A. A descriptive study
B. A case study
C. A randomized controlled trial (RCT)
D. A qualitative study
CORRECT ANSWER: C. A randomized controlled trial (RCT).
Rationale: RCTs are considered the gold standard for clinical research because
randomization reduces bias and allows for the determination of causal relationships.
,Question 4: The nurse is critically appraising a research article. Which question is most
important to ask when evaluating the validity of a study?
A. Was the sample size large enough to detect a di erence?
B. What was the impact factor of the journal?
C. Did the study have a control group?
D. Are the results clinically significant?
CORRECT ANSWER: A. Was the sample size large enough to detect a di erence?
Rationale: A small sample size may not have enough power to detect a statistically or
clinically significant di erence, making the study's findings unreliable.
Question 5: A nurse is implementing an evidence-based practice (EBP) change. The
nurse understands that the first step in the EBP process is:
A. Appraising the evidence.
B. Asking a clinical question.
C. Implementing the change.
D. Evaluating the outcome.
CORRECT ANSWER: B. Asking a clinical question.
Rationale: The EBP process begins with asking a clinical question, typically in the
PICOT format, to identify a gap in knowledge.
Question 6: The nurse is evaluating the strength of a body of evidence for a clinical
practice guideline. Which of the following is a key component of "Level of Evidence"?
A. The number of citations in the article.
B. The author's credentials.
C. The study design and quality.
D. The year of publication.
CORRECT ANSWER: C. The study design and quality.
Rationale: The level of evidence is primarily determined by the study design (e.g., RCT
vs. case report) and the methodological quality of the research.
Question 7: A nurse is reading a systematic review. The nurse understands that a
systematic review is di erent from a literature review because a systematic review:
,A. Is written by a single author.
B. Uses a comprehensive, rigorous, and explicit methodology.
C. Is shorter in length.
D. Does not include an abstract.
CORRECT ANSWER: B. Uses a comprehensive, rigorous, and explicit methodology.
Rationale: A systematic review uses a structured, explicit methodology to identify,
select, and critically appraise relevant research, minimizing bias.
Question 8: The nurse is using a clinical practice guideline (CPG) to inform patient care.
The nurse understands that a CPG is:
A. A mandatory order from the hospital administration.
B. A set of systematically developed statements to assist practitioner and patient
decisions.
C. A legal document that must be followed exactly.
D. An individual nurse's opinion on best practice.
CORRECT ANSWER: B. A set of systematically developed statements to assist
practitioner and patient decisions.
Rationale: Clinical practice guidelines are evidence-based recommendations designed
to assist clinicians and patients in making decisions about appropriate healthcare.
Question 9: A nurse is conducting a literature search. The nurse wants to find the
highest level of evidence to answer a therapy question. Which database is most
appropriate to search?
A. MEDLINE/PubMed
B. CINAHL
C. The Cochrane Database of Systematic Reviews
D. PsycINFO
CORRECT ANSWER: C. The Cochrane Database of Systematic Reviews.
Rationale: The Cochrane Library is a collection of databases that contain high-quality,
systematic reviews and meta-analyses, which provide the highest level of evidence for
therapy questions.
Question 10: A nurse is assessing the applicability of a research study to a specific
patient population. The nurse should consider which factor?
, A. The study's sample size.
B. The statistical significance of the findings.
C. Whether the study subjects are similar to the patient population.
D. The impact factor of the journal.
CORRECT ANSWER: C. Whether the study subjects are similar to the patient
population.
Rationale: Applicability (or generalizability) depends on whether the study's population
is similar to the patient(s) the nurse is caring for.
Question 11: A nurse is evaluating a research article. The nurse notes that the study has
a "p-value" of 0.04. What does this result indicate?
A. There is a 4% chance that the results are due to chance.
B. The results are not statistically significant.
C. The results are clinically significant.
D. There is a 96% chance the results are due to chance.
CORRECT ANSWER: A. There is a 4% chance that the results are due to chance.
Rationale: A p-value of 0.04 (less than 0.05) means there is less than a 5% probability
that the observed results are due to chance, indicating statistical significance.
Question 12: A nurse is using the "PICOT" framework to search for evidence. Which of
the following is an example of an "Outcome" in PICOT?
A. Patients with heart failure.
B. A low-sodium diet.
C. A reduction in blood pressure.
D. Usual care.
CORRECT ANSWER: C. A reduction in blood pressure.
Rationale: The Outcome is what the nurse wants to measure or achieve (e.g., a
reduction in blood pressure).
Question 13: The nurse is reading a qualitative research study. The purpose of
qualitative research is to:
A. Test a hypothesis.
B. Understand the meaning of human experiences.
