Fagan Nomogram

Author: Michelle Lin, MD
Updated: 5/17/2012

Fagan Nomogram

Draw a line connecting your pre-test probability and your likelihood ratio. This provides you with your post-test probability.

Fagan nomogram


  • Caraguel CGB, Vanderstichel R The two-step Fagan's nomogram: ad hoc interpretation of a diagnostic test result without calculation Evidence-Based Medicine 2013;18:125-128. [PubMed]