Diagnostic tests in urology: Percentage of free prostate-specific antigen (PSA)

Yooni Yi, Rodney H. Breau, Kelsey Witiuk, Molly M. Neuberger, Philipp Dahm

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)683-685
Number of pages3
JournalBJU International
Issue number4
StatePublished - Apr 2013


  • diagnostic test
  • elevated PSA
  • evidence-based medicine
  • percentage of free prostate-specific antigen
  • prostate cancer


Dive into the research topics of 'Diagnostic tests in urology: Percentage of free prostate-specific antigen (PSA)'. Together they form a unique fingerprint.

Cite this