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Table 2 Correlations between the changes of sagittal alignment parameters following adjacent two-level ACDF

From: Analysis of a radiographic parameter K-line tilt following adjacent two-level anterior cervical discectomy and fusion: a retrospective study

 

ΔT1s

ΔC2–7 lordosis

ΔSA

ΔC2–7 SVA

ΔK-line tilt

ΔNDI

ΔT1s

r

1

.428*

.631**

.235*

.650*

.620*

p

 

.037

.005

.047

.042

.086

ΔC2–7 lordosis

r

.428*

1

.666*

− .467**

-.023

.102

p

.037

 

.022

.009

.847

.382

ΔSA

r

.631**

.666*

1

− .121

.269*

− .080

p

.005

.022

 

.312

.026

.592

ΔC2-7SVA

r

.235*

− .467**

− .121

1

.293*

.645*

p

.047

.009

.312

 

.013

.048

ΔK–line tilt

r

.650*

− .023

.269*

.293*

1

.702**

p

.042

.847

.026

.013

 

.028

ΔNDI

r

.620*

.102

− .080

.645*

.702**

1

p

.086

.382

.592

.048

.028

 
  1. T1s T1 slope, SVA sagittal vertical axis, SA segmental angle, NDI neck disability index
  2. *Correlation is significant at the p < 0.05 level (2-tailed)
  3. **Correlation is significant at the p < 0.01 level (2-tailed)