Question

29. A 70yo WM presents complaining of blood in his urine. An abdominal CT shows a mass in the patient's left kidney. A new blood test for the detection of clear cell carcinoma is performed and is positive. The patient asks, "What are the chances that I truly have cancer?" The specificity of the test is 55%, and the sensitivity is 85%. Assume the pretest probability is 50%. What is the appropriate answer? A. 53% B. 79% C. 65% D. 85% E. 55%

Answer 1

/ Date Th FrS Su O. 85 0.425 0.5 O.LS O075 Have caner Ve O.45 O-225 Not tave O.SS O.275 Candey Ve elTnly have carces 0.428 t022s O.6S0 65%