Supraspinatus Tear: Likelihood Ratios

Introduction: Part of the Rotator Cuff.

The likelihood ratios of findings for Supraspinatus 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
[ + ] Jobe Test	+ 0 -	2.5	0.2
aka Empty Can Test Supraspinatus may be isolated by having the patient rotate the upper extremity, so that the thumbs are pointing to the floor and resistance is applied with the arms in 30 degrees of forward flexion and 90 degrees of abduction (simulates emptying of a can). Test is positive when weakness is present compared with the unaffected side, suggesting a disruption of the supraspinatus tendon. Study: Joint Bone Spine. 2008 Dec 5. PMID: 19059801
[ + ] Full Can Test	+ 0 -	3	0.3
The full can test consists in evaluating the patient's ability to resist downward pressure on the arms held at 90° elevation in the scapular plane and 45° external rotation. (positive if weakness) Study: Joint Bone Spine. 2008 Dec 5. PMID: 19059801