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Good Positive and Negative Likelihood Ratios

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Aortic Dissection: Likelihood Ratios

Introduction: Part of the spectrum of acute aortic syndromes, involving separation of the intima from the media of the aorta. This can progress to rupture as well as causing end-organ ischemia by involving branch arteries.

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Tags: Vascular Tag this Diagnosis.

The likelihood ratios of findings for Aortic Dissection 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
FindingResult +LR-LR
[ + ] Chest CT + 0 - 500
[ + ] MRI + 0 - 490
[ + ] Trans-Esophageal Echocardiography + 0 - 19.60
[ + ] Widened mediastinum + 0 - 90.1
Good Negative Likelihood Ratio
FindingResult +LR-LR
[ + ] Hypertension + 0 - 1.60.5
Good Positive Likelihood Ratio
FindingResult +LR-LR
[ + ] Pulse Deficit + 0 - 5.70.7
Poorly Diagnostic Findings
FindingResult +LR-LR
[ + ] Diastolic Murmur + 0 - 1.40.9
[ + ] Elevated D-dimer Sensitivity = 94%
[ + ] Pain Sensitivity = 90%
[ + ] Chest Pain Sensitivity = 67%
[ + ] Hypertension Sensitivity = 49%
[ + ] Tearing Pain Sensitivity = 39%
[ + ] Pain radiating to Back Sensitivity = 32%
[ + ] Shock Sensitivity = 19%
[ + ] Focal Neurological Signs Sensitivity = 17%
[ + ] Friction rub, pericardial Sensitivity = 6%
[ + ] Marfan Syndrome Sensitivity = 5%