Free Practice Quiz Question List

5 Selecting and Interpreting Investigations Online Quiz Questions

Use this free practice quiz with 20 questions to review 5 Selecting and Interpreting Investigations, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

True or false: If a diagnostic test is accurate, using it necessarily improves patient outcomes.

A
True
B
False

Choose one

1 point

A clinician is considering a test but cannot identify any change in management, follow-up, or discussion that would follow from its result. What is the best next step?

A
Order the test because more information is always useful.
B
First clarify what decision the result could change.
C
Choose the test with the greatest diagnostic accuracy, regardless of its purpose.
D
Order a broad panel to avoid missing any possible diagnosis.

Fill in the blank

1 point

A reference range is not automatically a diagnostic .

Choose one

1 point

A patient is unstable and a time-critical condition is suspected. Which approach best balances investigation with urgent care?

A
Wait for all test results before starting stabilization.
B
Complete confirmatory testing first, even if the patient is deteriorating.
C
Begin stabilization and necessary treatment promptly, obtaining tests in parallel when feasible.
D
Avoid testing until the patient is fully stable.

Written response

1 point

In a group of 1,000 people, 1% have a condition. A test has 90% sensitivity and 90% specificity. About what percentage of positive results will be true positives? Round to the nearest whole percentage point.

Choose all

1 point

Which factors should be considered as patient-specific risks when choosing an investigation? Select all that apply.

A
Pregnancy
B
Kidney function
C
The number of tests available at the clinic
D
Allergies
E
Comorbidities and ability to tolerate the procedure

Written response

1 point

What term describes a test result that is neither clearly positive nor clearly negative?

True or false

1 point

True or false: A negative result from a sensitive test can make a condition less likely, but it does not automatically rule it out in every patient.

A
True
B
False

Choose one

1 point

A patient has a low pretest probability of a condition, but a test returns positive. What is the most appropriate interpretation?

A
Treat the positive result as definitive because the test is reasonably accurate.
B
Consider confirming the finding, since a positive result may be false when the initial probability is low.
C
Ignore the result because low-probability patients should never be tested.
D
Repeat the same test until a negative result appears.

Fill in the blank

1 point

As investigation results return, the patient and update the plan as needed.

Choose all

1 point

A test result seems inconsistent with a patient's presentation. Which checks can help determine how to interpret it? Select all that apply.

A
Check whether the result is technically valid.
B
Consider whether the sample was collected at an appropriate time.
C
Check whether the test measures the condition being considered.
D
Assume the result is definitive if it falls inside a reference range.
E
Interpret the result in light of the test's intended use and limitations.

Choose one

1 point

A test result changes a clinician's estimate of disease likelihood, but it remains unclear whether to act. What should guide the next decision?

A
Interpret the result as having the same meaning in every patient.
B
Use the test result alone because pretest probability is no longer relevant.
C
Combine the result with pretest probability and decide whether the updated probability changes the next action.
D
Repeat the test routinely until the result matches the clinical impression.

Choose one

1 point

A stable patient has a low-urgency clinical question, and observation with follow-up may be reasonable. What is the best approach to choosing whether to test now?

A
Order the investigation immediately because observation cannot inform care.
B
Discuss the risks, benefits, and alternatives, including observation with planned reassessment if reasonable.
C
Proceed without discussing the patient's preferences because the patient is stable.
D
Choose the most invasive option to obtain the most definitive result.

Open ended

1 point

A patient's test result is reassuring, but the clinical presentation continues to raise strong concern for a dangerous diagnosis. Explain how you would evaluate the result and decide what to do next.

Choose one

1 point

A clinician is considering a test, but the result would not change treatment, follow-up, or a meaningful discussion with the patient. Which principle best explains why the test may have limited value?

A
Order the test because diagnostic accuracy alone guarantees better outcomes.
B
Order the test when a result could change treatment, follow-up, or a meaningful discussion.
C
Order the test whenever it can provide additional information, even if no decision could change.
D
Avoid the test unless it can establish the diagnosis with certainty.

Choose one

1 point

A patient is unstable and a time-critical condition is suspected. What is the best approach to testing and care?

A
Begin stabilization and necessary treatment promptly; obtain tests in parallel when feasible.
B
Wait for all test results before beginning treatment so the plan can be definitive.
C
Complete the most comprehensive test first, even if this delays stabilization.
D
Defer treatment until a bedside test is confirmed by a more definitive test.

True or false

1 point

A test’s diagnostic accuracy, by itself, establishes that using the test improves patient outcomes.

A
True
B
False

Choose one

1 point

A clinician is weighing investigation options for a patient with impaired kidney function. Which consideration from the investigation checklist is especially relevant to selecting a test?

A
Whether the test is commonly used, regardless of the patient’s circumstances.
B
Whether the result can provide more information, even if no decision could change.
C
The patient’s kidney function as part of assessing patient-specific risk and suitable alternatives.
D
Whether the test is available, without considering its risks or downstream consequences.

Written response

1 point

What is the estimated probability of a suspected condition before testing, based on the patient’s history, examination, risk factors, and relevant background rates called?

Written response

1 point

For a significant test result, what must be clearly assigned so that the result is reviewed, explained to the patient, and acted upon?