Posterior Probability of Disease Calculator

Instructions: Enter parameters in the Red cells. Answer will appear in the blue cell.

LR(test result) = Likelihood Ratio of the test result.

LR(test result)
Probability of result in patient WITH the disease		(>= 0.0 and <= 1.0, e.g. 0.95)
Probability of result in patient WITHOUT the disease		(>= 0.0 and <= 1.0, e.g. 0.01)
LR(test result)	95.000
Post-Test Probability
Pre-Test Probability		0.012 (Pre-Test Odds)
LR (test result)	95.000	1.154 (Post-Test Odds)
Post-Test	0.536

Software utilities by Michael Kohn (makohn@mkanders.com) and Mike Jarrett (mike.jarrett@quesgen.com)

Disclaimer: Software is provided on an as-is basis and no warranty is made of any kind. Calculations are believed accurate but should be verified by the user