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I’m pretty sure the test the sideline guy does with his hands is extremely high in predictive value.
The Lachman test has a sensitivity of 77.7% for acute ACL ruptures and 84.6% for subacute or chronic ACL ruptures.
Specificity
The Lachman test has a specificity of more than 95% for both acute and subacute or chronic ACL ruptures.
Accuracy
The Lachman test is considered to be the most accurate test for diagnosing ACL injuries.
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