Posterior open-door laminoplasty secured with titanium miniplates vs anchors: a comparative study of clinical efficacy and cervical sagittal balance

Table 3 Correlation analysis between radiologic parameters and clinical indicators (\( \overline{x} \) ± SD)

Item	Group A	Group B	Difference in NDI at 2 year after surgery
Item	Group A	Group B	R value	P value
Difference in NDI	21.2 ± 2.9	17.9 ± 3.7
Difference in C2-7 SVA (mm)	2.21 ± 0.71	4.77 ± 1.04	− 0.433	0.005

ISSN: 1749-799X