Zero-profile implant (Zero-p) versus plate cage benezech implant (PCB) in the treatment of single-level cervical spondylotic myelopathy

Table 4 Comparisons of Neck Disability Index (NDI) scores between two groups

Group	Case	Preoperative NDI score	3 months Postoperative NDI score	Final follow-up NDI score
Zero-p group	27	24.2 ± 4.1^**	14.1 ± 2.2^,*	13.8 ± 1.9^,*
PCB group	30	24.9 ± 3.7	14.4 ± 2.3^*	14.1 ± 1.8^*

^*Compared with the same group of preoperative P < 0.05; ^**compared with PCB group at the same time points P > 0.05

ISSN: 1471-2474