Lisfranc Injury: Likelihood Ratios

Introduction: The Lisfranc ligament attaches the medial cuneiform to the second metatarsal. Injuries can be fractures or simply ligament disruption.

The likelihood ratios of findings for Lisfranc Injury are listed below. See the left navigation bar to change the display.

Pre-Test Probability (Prevalence): %.	Post-Test Probability (Predictive Value): %.	Switch to display mode.
Note that calculating probabilities from more than one** finding is inherently inaccurate because findings are not independent. (For example, using two positive findings that share a common pathogenesis is likely to overestimate the true probability.)

Good Negative Likelihood Ratio
Finding	Result	+LR	-LR
[ + ] X-Ray	+ 0 -	1.8	0.3
Gold standard was CT Study: AJR Am J Roentgenol. 2012 Apr;198(4):W365-9. PMID: 22451574