Referenced Quotes about HIV/AIDS Tests and Measurements

Alberta Reappraising AIDS Society

David R. Crowe, President
Phone: +1-403-289-6609
Fax: +1-403-206-7717
Email: David.Crowe@aras.ab.ca

Roger Swan, Treasurer
Box 61037, Kensington Postal Outlet
Calgary, Alberta T2N 4S6
Canada
Office
Phone: +1-403-220-0129
Email: aras@aras.ab.ca
Web: noaids.ca

Referenced Quotes about HIV/AIDS Tests and Measurements

Positive Predictive Value (PPV) of Tests

The Positive Predictive Value (PPV) of a test is as important as its specificity and sensitivity. However, this value varies with the prevalence of the disease in a population. If a test is 99% specific, and 10% of a population being tested have the disease, there will be only 1 false positive for every 10 true positives. However, if only 1 out of 1,000 people have the disease, there will be 10 false positives for every true positive!

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