MCQ – 74673

A new test in the red line has been designed to diagnose a disease condition. The test is being applied to both normal and diseased populations. The graph of which is given below. Which of the following is correct regarding the test?

A.	High sensitivity and high specificity
B.	High sensitivity and low specificity
C.	Low sensitivity and low specificity
D.	Low sensitivity and high specificity

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Correct Answer � B Explanation

Answer- B. High sensitivity and low specificity

The line in red shows the new test curve distribution is shorter than old thus, the 95% CI range of new test will be more precise than the old test. For a particular cut off point, the sensitivity of the new test will be high since the 95% CI is precise for the new test than the old test. So, high sensitivity is achieved at the expense of a decrease in specificity.