A 57-year-old man with a history of bleeding per rectum visits his physician to discuss the results of his recent CT colpography test. The test was positive for the presence of a colorectal polyp. The sensitivity and specificity of this test to detect a colorectal polyp is 75% and 90% respectively.
What is the probability that this patient indeed has a colorectal polyp?
A – 92%
B – 90%
C – 88%
D – 86%
E – 84%
Positive predictive value of the test is the probability that a patient with a positive test indeed has a disease. This patient has a positive test. To estimate the PPV of the test we must draw a 2×2 table.
RPV = TP/all positive (TP+FP)
The correct answer is C
We got 3 Correct answers. Drawing is done and the winner is Mina Shehata
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