Test library › Shoulder & upper arm
Full can test
For: Supraspinatus tear
A tear in the supraspinatus, the rotator cuff tendon across the top of the shoulder that helps lift the arm out to the side. Tears can be partial or full-thickness.
A weak test on its ownWhat the numbers mean
- Positive result: a small shift: a positive result nudges the diagnosis up, but does not settle it.
- Negative result: a small shift: a negative result nudges the diagnosis down, but does not exclude it.
Source
Jain NB, Luz J, Higgins LD, Dong Y, Warner JJP, Matzkin E, Katz JN. The Diagnostic Accuracy of Special Tests for Rotator Cuff Tear: The ROW Cohort Study. Am J Phys Med Rehabil. 2017;96(3):176–183. PubMed · single study
Figures as they will appear in Rule It In, Rule It Out (Trokos, forthcoming). If a newer or better study changes them, this page changes with the book. Figures last updated from the book on 2 October 2026.
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This page gives the published figures. Rule It In, Rule It Out adds how to do this test, what counts as positive, how to read the result, and, where studied, whether combining it with other tests helps.
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One study, one test, once a month
Rule It In is a free evidence letter for musculoskeletal clinicians: one recent study explained, one examination test with its real numbers. From Trokos, publisher of Rule It In, Rule It Out.