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Table 3 Correlation between the changes of sagittal alignment parameters following ACHDF

From: Analysis of sagittal alignment parameters following anterior cervical hybrid decompression and fusion of multilevel cervical Spondylotic myelopathy

   T1 s C2–7SVA C2–7 lordosis Cranial tilting Cervical tilting
T1 s r   0.118 0.334* − 0.063 0.391**
P   0.458 0.031 0.692 0.010
C2–7SVA r 0.118   −0.132 0.605** − 0.218
P 0.458   0.406 0.000 0.165
C2–7 lordosis r 0.334* − 0.132   −0.310* 0.502*
P 0.031 0.406   0.045 0.001
Cranial tilting r −0.063 0.605** − 0.310*   −0.622**
P 0.692 0.000 0.045   0.000
Cervical tilting r 0.391** − 0.218 0.502** − 0.622**  
P 0.010 0.165 0.001 0.000  
  1. ACHDF, anterior cervical hybrid decompression and fusion; SVA, sagittal vertical axis; T1 s, T1 slope
  2. *Correlation is significant at the P < 0.05 level (2-tailed);
  3. **Correlation is significant at the P < 0.01 level (2-tailed)