Skip to main content

Table 2 Diagnostic validity of the “low midline sill sign” for the detection of lumbar spondylolisthesis

From: New physical examination tests for lumbar spondylolisthesis and instability: low midline sill sign and interspinous gap change during lumbar flexion-extension motion

   Radiographic lumbar spondylolisthesis
   Positive Negative
Low midline sill sign Positive      26        7
Negative         6     57
  1. The sensitivity, specificity, positive predictive value, and negative predictive value of the test were 81.3%, 89.1%, 78.8%, and 90.5%, respectively.