Diagnostic tests in urology: percentage of free prostate-specific antigen (PSA)
Article first published online: 29 OCT 2012
© 2012 The Authors. BJU International © 2012 BJU International
Volume 111, Issue 4, pages 683–685, April 2013
How to Cite
Yi, Y., Breau, R. H., Witiuk, K., Neuberger, M. M. and Dahm, P. (2013), Diagnostic tests in urology: percentage of free prostate-specific antigen (PSA). BJU International, 111: 683–685. doi: 10.1111/j.1464-410X.2012.11446.x
- Issue published online: 2 APR 2013
- Article first published online: 29 OCT 2012
- diagnostic test;
- percentage of free prostate-specific antigen;
- elevated PSA;
- prostate cancer;
- evidence-based medicine
What's known on the subject? and What does the study add?
- Free to total PSA ratios are commonly used as an adjunct to total PSA levels to better define an individual's risk for prostate cancer; however, its strengths and weaknesses are not well understood.
- This article illustrates the use of likelihood ratios that can be generated from the reported sensitivities and specificities from given free to total PSA thresholds in either increasing or decreasing an individual patient's probability of prostate cancer. Understanding the strengths and limitations of free to total PSA testing will help clinicians anticipate whether its use is indicated or not.