A new blood test to detect prostate cancer by measuring prostate specific antigen (PSA) was given to 1,000 male members of a large HMO. Although 50 of the men actually had prostate cancer, the test was positive (PSA> 4 ng/mL) in only 15; the other 35 patients with prostate cancer had negative tests. Of the 950 men without prostate cancer, the test was positive in 200 men and negative in 750. What is the positive predictive value of this blood test?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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A new blood test to detect prostate
cancer by measuring prostate specific
antigen (PSA) was given to 1,000 male
members of a large HMO. Although
50 of the men actually had prostate
cancer, the test was positive (PSA> 4
ng/mL) in only 15; the other 35
patients with prostate cancer had
negative tests. Of the 950 men
without prostate cancer, the test was
positive in 200 men and negative in
750. What is the positive predictive
value of this blood test?
Transcribed Image Text:A new blood test to detect prostate cancer by measuring prostate specific antigen (PSA) was given to 1,000 male members of a large HMO. Although 50 of the men actually had prostate cancer, the test was positive (PSA> 4 ng/mL) in only 15; the other 35 patients with prostate cancer had negative tests. Of the 950 men without prostate cancer, the test was positive in 200 men and negative in 750. What is the positive predictive value of this blood test?
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