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Table 3 Comparison of neck function and neurological function recovery between the two groups

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

Group n NDI (%) JOA score Recovery rate (%)
Preop 3 months postop Final follow-up Preop 3 months postop Final follow-up
Later mass group 55 13.6 ± 2.7 9.7 ± 1.8* 8.2 ± 1.1* 7.4 ± 1.7 12.4 ± 3.0* 13.5 ± 3.3* 64.5 ± 12.3
Lamina group 43 13.9 ± 3.0 12.6 ± 2.3* 9.4 ± 1.5* 7.2 ± 1.9 11.8 ± 2.9* 13.1 ± 3.1* 62.6 ± 11.7
t value 0.519 7.004 4.568 0.549 0.996 0.611 1.346
P value 0.604 < 0.001 < 0.001 0.583 0.321 0.542 0.181
  1. JOA Japanese Orthopedic Association, NDI neck disability index
  2. *Compared with before surgery, P < 0.05