Public Health Quiz #5: Receiver Operating Characteristic Curve

1. A new diagnostic test for detecting a rare cardiac disease in an asymptomatic population is being evaluated. The test's sensitivity is 90%, and its specificity is 85%. Which of the following best describes the point representing this test on a Receiver Operating Characteristic (ROC) curve? 

Question 1 of 5

2. Which of the following characteristics of a Receiver Operating Characteristic (ROC) curve indicates the best performance of a diagnostic test?

Question 2 of 5

3. A diagnostic test for a certain infection has an area under the ROC curve (AUC) of 0.95. What does this indicate about the test's accuracy?

Question 3 of 5

4. In evaluating a new screening test for lung cancer, it is found that lowering the threshold for a positive test result increases the sensitivity but decreases the specificity. How would this adjustment affect the ROC curve for this test?

Question 4 of 5

5. A newly developed assay for detecting a biomarker in patients with a specific type of cancer demonstrates an area under the ROC curve (AUC) of 0.75. Another established test for the same biomarker shows an AUC of 0.85. Assuming both tests are applied in similar populations, which statement is correct?

Question 5 of 5


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