External Rotation Lag Sign |
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The External Rotation Lag Sign is used to identify supraspinatus or infraspinatus tears. Specifically, this test is helpful in identifying the presence of full thickness tears.
External Rotation Lag Sign test Sensitivity and Specificity Sensitivity = 0.46 Specificity = 0.94 +LR = 1.7 – LR = 0.60 Source: Miller CA, Forrester GA, and Lewis JS: The validity of the lag signs in diagnosing full-thickness tears of the rotator cuff: a preliminary investigation. Arch Phys Med Rehabil 2008; 89: pp. 1162-1168 |