Cholelithiasis: Likelihood Ratios

Introduction: Presence of stones in the gallbladder (most commonly cholesterol). See Cholecystitis, Acute Pancreatitis, or Choledocholithiasis, which are possible sequelae.

The likelihood ratios of findings for Cholelithiasis 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 Positive and Negative Likelihood Ratios
Finding	Result	+LR	-LR
[ + ] Abdominal US	+ 0 -	84	0.2
Study: Arch Intern Med. 1994 Nov 28;154(22):2573-81. PMID: 7979854

Findings With Unspecified Accuracy
Finding	Result	+LR	-LR
[ + ] Oral Cholecystogram		No accuracy specified.
accuracy worse than abdominal US Study: Arch Intern Med. 1994 Nov 28;154(22):2573-81. PMID: 7979854