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Good Positive and Negative Likelihood Ratios

Good Negative Likelihood Ratio

Good Positive Likelihood Ratio

Infraspinatus Tear: Likelihood Ratios

Introduction: Part of the rotator cuff.

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The likelihood ratios of findings for Infraspinatus Tear 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
[ + ] External Rotation Lag Sign	+ 0 -	inf	0.3
weakness in external rotation with arm abducted 20 degrees Study: Joint Bone Spine. 2008 Dec 5. PMID: 19059801
[ + ] Resist External Rotation	+ 0 -	2.4	0.3
arm at side, elbow flexed, resist external rotation Study: Joint Bone Spine. 2008 Dec 5. PMID: 19059801

Good Negative Likelihood Ratio
Finding	Result	+LR	-LR
[ + ] Patte Test	+ 0 -	1.8	0.4
arm at 90 degress, elbow flexed, resist external rotation Study: Joint Bone Spine. 2008 Dec 5. PMID: 19059801

Good Positive Likelihood Ratio
Finding	Result	+LR	-LR
[ + ] External Rotation Drop Sign	+ 0 -	inf	0.8
weakness in external rotation with arm abducted to 90 degrees Study: Joint Bone Spine. 2008 Dec 5. PMID: 19059801