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Table 2 Comparison of imaging data between the two groups

From: Influence of fixed titanium plate position on the effectiveness of open-door laminoplasty for cervical spondylotic myelopathy

Group n Opening angle (°) Opening width (mm) Spinal cord drift distance (mm) Hinge fracture CCI (%)
Yes No Preop Final follow-up
Later mass group 55 39.6 ± 5.1 21.7 ± 2.3 2.7 ± 0.5 5 (9.1%) 50(90.9%) 19.6 ± 4.5 18.7 ± 4.1
Lamina group 43 42.3 ± 5.7 17.3 ± 2.1 2.2 ± 0.4 11(25.6%) 32(74.4%) 19.2 ± 4.7 18.5 ± 3.9
t value 2.469 9.759 5.352 4.804 0.428 0.245
P value 0.015 < 0.001 < 0.001 0.028 0.669 0.807
  1. CCI cervical curvature index