A Nuclear Stress Test Using a New Radioisotope Tracer Has

A nuclear stress test using a new radioisotope tracer has a sensitivity of 60% and specificity of 80% for detecting hemodynamically significant coronary artery disease, defined as coronary artery narrowing > 50% by coronary angiography.  In a patient with a pre-test probability for coronary artery disease of 40%, what is the positive likelihood ratio for the test?

A) 0) 5
B) 1
C) 2
D) 3
E) 4

Correct Answer:

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