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Table 4 Correlation between sagittal parameters and NDI scores

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

  Sagittal parameters Correlation (Spearman r) P
Preoperative NDI scores Preoperative T1 s 0.489 0.001**
Preoperative C2–7SVA 0.206 0.191
Preoperative C2–7 lordosis 0.245 0.117
Preoperative Cranial tilting 0.154 0.331
Preoperative Cervical tilting 0.449 0.003**
Follow-up NDI scores Follow-up T1 s 0.421 0.006**
Follow-up C2–7SVA 0.106 0.503
Follow-up C2–7 lordosis 0.190 0.228
Follow-up Cranial tilting 0.115 0.470
Follow-up Cervical tilting 0.156 0.325
  1. SVA sagittal vertical axis, T1 s T1 slope
  2. **Correlation is significant at the P < 0.01 level (2-tailed)