NR511 Week 4 Midterm Examination
Differential Diagnosis & Primary Care
Practicum
SECTION 1: DIAGNOSTIC REASONING & CLINICAL DECISION-MAKING (Questions
1–35)
1. A clinician continually questions whether any key diagnoses are being
overlooked and whether each ordered test truly adds value. This reflective
process best describes which concept?
A) SOAP documentation
B) Diagnostic reasoning
C) Medical decision making
D) Differential diagnosis
Correct Answer: B) Diagnostic reasoning
Rationale: Diagnostic reasoning is a reflective, critical-thinking process where the
clinician questions their own thinking to ensure all possibilities are explored and
conclusions are evidence-based. It is the foundation of clinical judgment.
,2. What is the first step in the diagnostic reasoning process?
A) Physical examination
B) History of present illness (HPI)
C) Ordering diagnostic tests
D) Formulating a differential diagnosis
Correct Answer: B) History of present illness (HPI)
Rationale: The HPI is the first step, using the OLDCARTS mnemonic to gather
detailed information about the chief complaint.
3. A diagnostic test has very few false negatives. How is this test best described?
A) High specificity
B) Low specificity
C) High sensitivity
D) Low sensitivity
Correct Answer: C) High sensitivity
,Rationale: A highly sensitive test correctly identifies most people who have the
condition, resulting in very few false negatives. This makes it a good test to help
rule out a disease when negative.
4. The predictive value of a diagnostic test depends on which of the following?
A) The sensitivity of the test
B) The specificity of the test
C) The prevalence of the condition in the population
D) All of the above
Correct Answer: D) All of the above
Rationale: Predictive value is the likelihood that the patient actually has the
condition given the test result, and it depends on sensitivity, specificity, and
disease prevalence.
5. A 55-year-old male presents with chest pain. His pretest probability of
coronary artery disease is high based on risk factors. Which of the following
statements about test interpretation is correct?
, A) A negative stress test effectively rules out CAD
B) A positive stress test is highly likely to be a true positive
C) Test characteristics are independent of pretest probability
D) A negative stress test has high positive predictive value
Correct Answer: B) A positive stress test is highly likely to be a true positive
Rationale: When pretest probability is high, the positive predictive value
increases—a positive test is more likely to be a true positive. Conversely, negative
predictive value decreases in high-prevalence populations.
6. Which component of the history helps refine the diagnostic hypothesis by
offering new explanations for symptoms or ruling out others?
A) History of present illness
B) Past medical history
C) Review of systems
D) Chief complaint
Correct Answer: B) Past medical history
Differential Diagnosis & Primary Care
Practicum
SECTION 1: DIAGNOSTIC REASONING & CLINICAL DECISION-MAKING (Questions
1–35)
1. A clinician continually questions whether any key diagnoses are being
overlooked and whether each ordered test truly adds value. This reflective
process best describes which concept?
A) SOAP documentation
B) Diagnostic reasoning
C) Medical decision making
D) Differential diagnosis
Correct Answer: B) Diagnostic reasoning
Rationale: Diagnostic reasoning is a reflective, critical-thinking process where the
clinician questions their own thinking to ensure all possibilities are explored and
conclusions are evidence-based. It is the foundation of clinical judgment.
,2. What is the first step in the diagnostic reasoning process?
A) Physical examination
B) History of present illness (HPI)
C) Ordering diagnostic tests
D) Formulating a differential diagnosis
Correct Answer: B) History of present illness (HPI)
Rationale: The HPI is the first step, using the OLDCARTS mnemonic to gather
detailed information about the chief complaint.
3. A diagnostic test has very few false negatives. How is this test best described?
A) High specificity
B) Low specificity
C) High sensitivity
D) Low sensitivity
Correct Answer: C) High sensitivity
,Rationale: A highly sensitive test correctly identifies most people who have the
condition, resulting in very few false negatives. This makes it a good test to help
rule out a disease when negative.
4. The predictive value of a diagnostic test depends on which of the following?
A) The sensitivity of the test
B) The specificity of the test
C) The prevalence of the condition in the population
D) All of the above
Correct Answer: D) All of the above
Rationale: Predictive value is the likelihood that the patient actually has the
condition given the test result, and it depends on sensitivity, specificity, and
disease prevalence.
5. A 55-year-old male presents with chest pain. His pretest probability of
coronary artery disease is high based on risk factors. Which of the following
statements about test interpretation is correct?
, A) A negative stress test effectively rules out CAD
B) A positive stress test is highly likely to be a true positive
C) Test characteristics are independent of pretest probability
D) A negative stress test has high positive predictive value
Correct Answer: B) A positive stress test is highly likely to be a true positive
Rationale: When pretest probability is high, the positive predictive value
increases—a positive test is more likely to be a true positive. Conversely, negative
predictive value decreases in high-prevalence populations.
6. Which component of the history helps refine the diagnostic hypothesis by
offering new explanations for symptoms or ruling out others?
A) History of present illness
B) Past medical history
C) Review of systems
D) Chief complaint
Correct Answer: B) Past medical history
