Tools

Add a finding for this diagnosis

Add prevalence for this diagnosis

Switch to display mode

Switch to sensitivity and specificity

Sort findings by Tag

Sort findings by Differential Diagnosis

Jump To

Good Negative Likelihood Ratio

Poorly Diagnostic Findings

Findings With Unspecified Accuracy

Shoulder Impingement: Likelihood Ratios

Introduction: aka Subacromial impingement

[Edit Diagnosis] [Merge dx] [Add prevalence]

Tags: Musculoskeletal Tag this Diagnosis.

The likelihood ratios of findings for Shoulder Impingement 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
[ + ] Hawkins Test	+ 0 -	1.9	0.4
With examiner's hand on scapula to prevent elevation, hold arm parallel to ground with elbow flexed at 90 degrees and internally rotate (i.e. push forearm down). NOTE: odds ratio CI crosses 1! Study: Br J Sports Med. 2008 Feb;42(2):80-92. PMID: 17720798
[ + ] Neer test	+ 0 -	1.7	0.4
(forward) extension of shoulder with radius down (fully pronated) and examiner's hand placed on shoulder to prevent scapula elevation NOTE: odds ratio CI crosses 1! Study: Br J Sports Med. 2008 Feb;42(2):80-92. PMID: 17720798

Poorly Diagnostic Findings
Finding	Result	+LR	-LR
[ + ] Yocum Test		Sensitivity = 78%
specificity not measured Place hand on other shoulder, raise elbow without raising shoulder. Study: Joint Bone Spine. 2008 Dec 5. PMID: 19059801

Findings With Unspecified Accuracy
Finding	Result	+LR	-LR
[ + ] Supraspinatus Test		No accuracy specified.
aka empty-can test. Study: no study specified.
[ + ] Painful Arc Test		No accuracy specified.
the two studies that were done completely disagreed (sens/spec = 30/80 in one and 97/10 in the other) painful arc during lateral arm elevation Study: Joint Bone Spine. 2008 Dec 5. PMID: 19059801