Etiologic Predictive Value (EPV) is designed to calculate the predictive value of test while considering the possibility of carriers of the marker the test is designed to detect. EPV produces predictive value of tests without requiring a gold standard. More background information can be found on the webpage describing EPV as well as in the PhD thesis describing EPV. The calculator below calculates Positive and negative EPV with 95% confidence intervals.
Ronny Gunnarsson. EPV Calculator [in Science Network TV]. Available at: http://science-network.tv/epv-calculator/. Accessed March 19, 2018.