NR511 Differential Diagnosis & Primary Care
Practicum Final Exam Questions and Answers |
Chamberlain
NR511: Differential Diagnosis & Primary Care Practicum Final Exam
100 Verified Questions & Answers with Detailed Rationales (2026/2027 Update)
SECTION 1: DIAGNOSTIC REASONING & CLINICAL DECISION-MAKING
1. A highly sensitive test (95%) comes back negative. What is the most
appropriate interpretation of this result?
A) The patient definitely does not have the condition
B) The condition is highly unlikely given the high sensitivity (SnNout)
C) The test should be repeated because sensitivity below 100% is unreliable
D) Specificity is more important than sensitivity for ruling out disease
Correct Answer: B. The condition is highly unlikely given the high sensitivity
(SnNout). Rationale: A highly sensitive test means that 95% of people with the
disease will test positive. Therefore, a negative result on a highly sensitive test
effectively rules out the disease (SnNout: Sensitive, Negative, rules OUT).
Specificity is used to rule IN disease (SpPin) .
2. A nurse practitioner is evaluating a 45-year-old woman with a positive
mammogram. The test has a sensitivity of 85% and specificity of 90%. The
prevalence of breast cancer in this age group is approximately 1%. Which
statement about positive predictive value (PPV) is most accurate?
,A) PPV increases as disease prevalence increases in the population tested
B) PPV is independent of disease prevalence and depends only on test
characteristics
C) PPV in this scenario would be approximately 85% given the high sensitivity
D) PPV is calculated by dividing true negatives by all negative results
Correct Answer: A. PPV increases as disease prevalence increases in the
population tested. Rationale: Positive Predictive Value (PPV) is directly influenced
by disease prevalence. Even with a test that has 85% sensitivity and 90%
specificity, when prevalence is only 1%, the PPV will be relatively low because most
positive results will be false positives. As prevalence increases, TP increases
relative to FP, raising the PPV .
3. Which of the following best describes the clinical utility of a likelihood ratio
(LR+) of 12?
A) The test result moderately increases the probability of disease
B) The test result strongly increases the probability of disease
C) The test result has no meaningful effect on disease probability
D) The test result strongly decreases the probability of disease
Correct Answer: B. The test result strongly increases the probability of disease.
Rationale: A likelihood ratio positive (LR+) greater than 10 is considered strong
evidence to rule IN a disease. An LR+ of 12 means that a positive test result is 12
times more likely in a patient with the disease compared to a patient without the
disease .
4. A 32-year-old patient presents with acute onset of pleuritic chest pain,
dyspnea, and tachycardia following a long-haul flight. The nurse practitioner
calculates a Wells score of 4.5. What is the most appropriate next step in
diagnostic management?
,A) Obtain a chest X-ray as the best initial test for pulmonary embolism
B) Order a D-dimer because the Wells score is below the threshold for imaging
C) Proceed directly to CT pulmonary angiography given the high clinical probability
D) Prescribe anticoagulation and observe for 24 hours before further testing
Correct Answer: C. Proceed directly to CT pulmonary angiography given the high
clinical probability. Rationale: A Wells score of 4.5 indicates high clinical
probability for pulmonary embolism (score >4 is high). In high-probability patients,
the next step is to proceed directly to CT pulmonary angiography (CTPA), which is
the gold standard imaging study. D-dimer is most useful in low-to-moderate
probability patients .
5. What is the first step when presenting a case using the SNAPPS model?
A) Summarize the history and physical findings succinctly
B) Narrow the differential diagnosis to two or three relevant conditions
C) Analyze the differential by comparing and contrasting possibilities
D) Probe the preceptor about clinical uncertainties and learning points
Correct Answer: A. Summarize the history and physical findings succinctly.
Rationale: The SNAPPS model begins with "S" — Summarize the history and
physical findings briefly and concisely before moving into narrowing the
differential. Starting with narrowing the differential skips the essential first step of
establishing what data you are working from .
6. What does the "A" in SNAPPS stand for?
A) Assessment
B) Analyze
C) Apply
D) Assess
Correct Answer: B. Analyze. Rationale: In SNAPPS, the "A" stands for "Analyze"
(analyze the differential), not "Assessment" .
, 7. The A in SNAPPS stands for Assessment.
A) True
B) False
Correct Answer: B. False. Rationale: In SNAPPS, the "A" stands for "Analyze"
(analyze the differential), not "Assessment" .
8. According to current E/M documentation guidelines for a Level 5 established
patient office visit (99215), which element is REQUIRED for the HPI to meet
criteria as "extended"?
A) Documentation of at least four elements of the HPI (OLDCARTS)
B) Documentation of the past medical, family, and social history in detail
C) Inclusion of a comprehensive review of systems with at least 10 systems
D) Presence of at least two chronic diseases with stable status documented
Correct Answer: A. Documentation of at least four elements of the HPI
(OLDCARTS). Rationale: For an extended HPI under current E/M guidelines
(effective 2021 and beyond), documentation of four or more elements of the HPI
(such as Onset, Location, Duration, Character, Aggravating/Alleviating factors,
Radiation, Timing, Severity) satisfies the requirement for a Level 5 established
patient visit .
9. What is subjective data?
A) Anything the clinician can see, touch, feel, hear, or smell during an exam
B) Laboratory data and diagnostic test results
C) Anything the patient tells you or complains of regarding their symptoms,
including chief complaint, HPI, and ROS
D) Vital signs and physical examination findings
Practicum Final Exam Questions and Answers |
Chamberlain
NR511: Differential Diagnosis & Primary Care Practicum Final Exam
100 Verified Questions & Answers with Detailed Rationales (2026/2027 Update)
SECTION 1: DIAGNOSTIC REASONING & CLINICAL DECISION-MAKING
1. A highly sensitive test (95%) comes back negative. What is the most
appropriate interpretation of this result?
A) The patient definitely does not have the condition
B) The condition is highly unlikely given the high sensitivity (SnNout)
C) The test should be repeated because sensitivity below 100% is unreliable
D) Specificity is more important than sensitivity for ruling out disease
Correct Answer: B. The condition is highly unlikely given the high sensitivity
(SnNout). Rationale: A highly sensitive test means that 95% of people with the
disease will test positive. Therefore, a negative result on a highly sensitive test
effectively rules out the disease (SnNout: Sensitive, Negative, rules OUT).
Specificity is used to rule IN disease (SpPin) .
2. A nurse practitioner is evaluating a 45-year-old woman with a positive
mammogram. The test has a sensitivity of 85% and specificity of 90%. The
prevalence of breast cancer in this age group is approximately 1%. Which
statement about positive predictive value (PPV) is most accurate?
,A) PPV increases as disease prevalence increases in the population tested
B) PPV is independent of disease prevalence and depends only on test
characteristics
C) PPV in this scenario would be approximately 85% given the high sensitivity
D) PPV is calculated by dividing true negatives by all negative results
Correct Answer: A. PPV increases as disease prevalence increases in the
population tested. Rationale: Positive Predictive Value (PPV) is directly influenced
by disease prevalence. Even with a test that has 85% sensitivity and 90%
specificity, when prevalence is only 1%, the PPV will be relatively low because most
positive results will be false positives. As prevalence increases, TP increases
relative to FP, raising the PPV .
3. Which of the following best describes the clinical utility of a likelihood ratio
(LR+) of 12?
A) The test result moderately increases the probability of disease
B) The test result strongly increases the probability of disease
C) The test result has no meaningful effect on disease probability
D) The test result strongly decreases the probability of disease
Correct Answer: B. The test result strongly increases the probability of disease.
Rationale: A likelihood ratio positive (LR+) greater than 10 is considered strong
evidence to rule IN a disease. An LR+ of 12 means that a positive test result is 12
times more likely in a patient with the disease compared to a patient without the
disease .
4. A 32-year-old patient presents with acute onset of pleuritic chest pain,
dyspnea, and tachycardia following a long-haul flight. The nurse practitioner
calculates a Wells score of 4.5. What is the most appropriate next step in
diagnostic management?
,A) Obtain a chest X-ray as the best initial test for pulmonary embolism
B) Order a D-dimer because the Wells score is below the threshold for imaging
C) Proceed directly to CT pulmonary angiography given the high clinical probability
D) Prescribe anticoagulation and observe for 24 hours before further testing
Correct Answer: C. Proceed directly to CT pulmonary angiography given the high
clinical probability. Rationale: A Wells score of 4.5 indicates high clinical
probability for pulmonary embolism (score >4 is high). In high-probability patients,
the next step is to proceed directly to CT pulmonary angiography (CTPA), which is
the gold standard imaging study. D-dimer is most useful in low-to-moderate
probability patients .
5. What is the first step when presenting a case using the SNAPPS model?
A) Summarize the history and physical findings succinctly
B) Narrow the differential diagnosis to two or three relevant conditions
C) Analyze the differential by comparing and contrasting possibilities
D) Probe the preceptor about clinical uncertainties and learning points
Correct Answer: A. Summarize the history and physical findings succinctly.
Rationale: The SNAPPS model begins with "S" — Summarize the history and
physical findings briefly and concisely before moving into narrowing the
differential. Starting with narrowing the differential skips the essential first step of
establishing what data you are working from .
6. What does the "A" in SNAPPS stand for?
A) Assessment
B) Analyze
C) Apply
D) Assess
Correct Answer: B. Analyze. Rationale: In SNAPPS, the "A" stands for "Analyze"
(analyze the differential), not "Assessment" .
, 7. The A in SNAPPS stands for Assessment.
A) True
B) False
Correct Answer: B. False. Rationale: In SNAPPS, the "A" stands for "Analyze"
(analyze the differential), not "Assessment" .
8. According to current E/M documentation guidelines for a Level 5 established
patient office visit (99215), which element is REQUIRED for the HPI to meet
criteria as "extended"?
A) Documentation of at least four elements of the HPI (OLDCARTS)
B) Documentation of the past medical, family, and social history in detail
C) Inclusion of a comprehensive review of systems with at least 10 systems
D) Presence of at least two chronic diseases with stable status documented
Correct Answer: A. Documentation of at least four elements of the HPI
(OLDCARTS). Rationale: For an extended HPI under current E/M guidelines
(effective 2021 and beyond), documentation of four or more elements of the HPI
(such as Onset, Location, Duration, Character, Aggravating/Alleviating factors,
Radiation, Timing, Severity) satisfies the requirement for a Level 5 established
patient visit .
9. What is subjective data?
A) Anything the clinician can see, touch, feel, hear, or smell during an exam
B) Laboratory data and diagnostic test results
C) Anything the patient tells you or complains of regarding their symptoms,
including chief complaint, HPI, and ROS
D) Vital signs and physical examination findings
