Table 5 Correlations among sagittal parameters and trapezoidal features.

From: Spinal sagittal alignment and trapezoidal deformity in patients with degenerative cervical spondylolisthesis

 

T1S

T1-T4 TK

A/Pbelow

A/SPbelow

S/Ibelow

T1S

1

    

T1-T4 TK

0.51

1

   

A/Pbelow

−0.51

−0.50

1

  

A/SPbelow

−0.40

−0.40

0.55

1

 

S/Ibelow

−0.41

−0.41

0.53

0.99

1

  1. T1S: T1 slope.
  2. TK: thoracic kyphosis angle.
  3. A/Pbelow: the ratio of anterior wall height to posterior wall height of the vertebra below seen from the slippage.
  4. A/SPbelow: the ratio of superior end-plate width to sum of superior end-plate width and inferior end-plate width of the vertebra below seen from the slippage.
  5. S/Ibelow: the ratio of superior end-plate width to inferior end-plate width of the vertebra below seen from the slippage.
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